Programming the Multiplex Profi mc3030

Programming the Multiplex Profi mc3030
Programming the
Multiplex Profi mc3030
by Mike Shellim
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Multiplex USA
560 Library Street
San Fernando, California 91340
Phone (818) 838-6467
Fax (818) 838-3127
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Version: 2.2
Please read licence conditions on page 2
Copyright  Michael Shellim 1999, 2000
Contents
nd
Introduction to 2 Revision ........................................................................................................2
Quick Start..................................................................................................................................3
Widgets, Controls and Servos....................................................................................................4
Mixers.........................................................................................................................................6
Configuring a Model from Scratch .............................................................................................8
EXAMPLE 1: V-tail Soarer .........................................................................................................8
EXAMPLE 2: 60” Pylon Racer .................................................................................................13
More about Servo and Control Adjustments ............................................................................16
Adding Spice: Secondary Switches .........................................................................................17
Setting up Ailerons, V-tails and Spoilers..................................................................................19
Coupled Ailerons and Rudder ..................................................................................................23
The FIX VAL Virtual Control.....................................................................................................23
Managing Model Memories......................................................................................................24
EXAMPLE 3: F3F machine ......................................................................................................25
More About User Mixers ..........................................................................................................27
Advanced Techniques..............................................................................................................32
DIY Switches ............................................................................................................................35
Appendix A - Mainboard Connections .....................................................................................38
Appendix B - Controls and Attributes .......................................................................................39
Appendix C - Screens Navigation ............................................................................................40
Appendix D - Program Screens by Category...........................................................................41
Appendix E - Servo Assignment Targets .................................................................................42
Appendix F - Secondary Switch Functions ..............................................................................43
Appendix G - Predefined Mixers ..............................................................................................44
Appendix H - Program Screens ...............................................................................................45
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Introduction to 2nd Revision
Welcome to the “alternative” guide to programming the Multiplex mc3030. The purpose of the
guide is to enable you to configure your radio from scratch, without recourse to the user
manual. If you’re a 4000 user, you may also benefit from the guide since the basic
architecture is similar to the 3030. If you don’t have a Multiplex radio yet, the guide will give
you a taste of the unique features and flexibility of the system.
A central feature of this guide is a three-step procedure which allows even complex set-ups to
be programmed with the minimum possibility of error.
Hopefully you will find the style more concise than the user
manual. Since the emphasis is on programming, I’ve omitted any
reference to housekeeping topics such as airborne equipment
and NiCd maintenance – these are dealt with adequately in the
user manual. Neither have I covered helicopter-specific features,
however the same principles apply to all kinds of model.
25 ELLIPS.1 PPM9
7.56Vóóóóóóóóóó
OP.TIME
01:12
PROFI mc3030 3.0
A basic knowledge of computer radios is assumed. If you’re a complete beginner to computer
radios you may benefit from running through the mc3030 user manual first, then come back
here to do some real programming!
nd
This 2 revision has an expanded section on user mixers. I’m fairly sure there will be no more
major revisions!
Incidentally, if you are not yet an owner of a 3030, there is a detailed review available on the
R/C Soaring web site at http://www.rc-soar.com along with users feedback and tips.
Licencing
A very quick word about licencing. This guide for free for personal use.
•
•
•
You may download it free from the R/C Soaring UK web site at http://www.rc-soar.com
You may make copies for other people, as long as it is for their own personal use. Please
copy the original in its entirety without any changes.
If you receive a copy of this guide from somebody else, you also agree to abide by the
terms of the licence.
What you may not do:
•
•
•
You may not sell copies at a profit.
You may not publish it in whole or in part electronically (e.g. via a web site) without
express permission.
If you are a retailer, this licence does not enable you to distribute copies to customers. If
you wish to do this please contact me at [email protected]
Acknowledgements
First and foremost, thanks first to Multiplex USA (http://www.multiplexrc.com) for their
invaluable support. If you are looking to buy MPX equipment or accessories, please take a
look at their Dealer Locator for all the Americas at http://www.multiplexrc.com/dealers.htm.
Thanks also to Multiplex for providing the LCD font for the screen shots, Harry Curzon for his
contributions, and to those modellers who kindly provided feedback on the draft versions.
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How to Use This Guide
Terminology
I have changed some of the terms used in the user manual. For example “options” are now
called “attributes”, “lists” are called “model memories” and so on. This is done to reflect
common usage, or to improve clarity.
Typographical Conventions
The following typographical conventions are used:
•
•
•
Programming screens are bold such as when you go to the Assign Servos screen.
Control attributes are BOLD CAPS such as EXPO, DIFFER and DUALRATE
Mixers are upper case e.g. BUTTERFL
Quick Start
Let’s jump straight in with a simple example to get the feel of programming the unit and gain
some idea of the MPX 3030 software architecture. The goal is simple: to control a single
servo on channel 1 via the right hand stick.
You will need to be familiar with basic keypad and menu operation, if not, then take time off to
read the, Keypad and Menu System on page 10 of the mc3030 manual. To learn more about
the individual screens, refer to Appendix H - Program Screen in this guide.
Follow these steps:
1. Go to the File Shift screen, select an empty memory, i.e. one named “-EMPTY--“
27 -EMPTY- PPM9
---------------CHANGE TO FILE
NO. ,27:-EMPTY-2. Go to the File Name screen, change the name from “-EMPTY--” to “TEST”.
27 TEST
PPM9
-- MODEL NAME -FILE
27Ä
NAME TEST
_
3. Go to the Assign Control screen, assign Aileron to “C”.
27 TEST
PPM9
- ASSIGN CTRL. CONTROL
CÄ
IS
AILERON_
4. Go to the Assign Servo screen, assign Servo 1 to Aileron.
27 TEST
PPM9
- ASSIGN SERVO SERVO
1Ä
IS
AILERON_
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5. Press M until you get back to the opening screen.
6. Plug a servo into channel 1, switch on the transmitter and receiver, and move the right
hand stick from side to side. The servo should follow the stick.
Note that there were three “things” involved in the programming process, namely
•
•
•
Sticks
Controls
Servos
These can be represented as three layers with sticks and switches at the top, servos at the
bottom and controls in the middle. For a servo to function there must be a route from servo to
stick. We can show this diagrammatically:
Figure 1
Assigning Controls and Servos
As you can see from Fig. 1, the Assign Controls
screen is used to create the link between controls
and sticks. Similarly the Assign Servos screen links
servos to controls.
Notice the direction of the arrows. The Assign Servo
screen assigns a servo to a control (not the other
way round), so the arrow is shown pointing upwards.
Same applies to Assign Control – a control is
assigned to a stick so again the arrow is an upward
pointing one.
Stick (A-H)
á
Assign Control
á
Control (aileron, elevator etc.)
á
Assign Servo
á
Servo Channel (1 – 9)
When you set up a new configuration you will always
start with the Assign Control and Assign Servo
screens, in that order. These are the two most
important screens in the system! Note that there are
also two corresponding “Adjust” screens, namely
Adjust Control and Adjust Servo. These are used
only after the control and servo assignments. It’s a
little confusing because the Assign screens are at the
Menu 2 level even though they are the first ones
you’ll be using to set up your model. The rationale
behind this is that although you use the Assign
screens first, you will probably end up using the
Adjust screens more often during day to day flying.
Widgets, Controls and Servos
Now you’ve looked at a simple example, let’s take a detailed look at the objects involved in
programming the transmitter, namely Widgets, Controls, Servos and Mixers.
Widgets and Ports
Widgets are things which the user can move on the transmitter front panel, i.e. the sticks,
switches, sliders and knobs. I’ve called them widgets because it’s more convenient than
“sticks, switches, sliders and knobs” although I will occasionally slip into the old terminology!
Each widget has a wiring harness which plugs into a port on the main board inside the
transmitter. Each port has a code embossed next to it. The codes are used in the various
programming screens to identify the individual sticks and switches.
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The codes A-G displayed on the front of the transmitter correspond to the default wiring of the
sticks and switches. If you connect the widgets to different pots inside the transmitter, the
legends will cease to be correct. Fortunately it’s easy to identify the port that a switch or slider
is connected to internally by using the Test Widgets screen.
Ports fall into three categories:
1. The nine ports A-I are reserved for primary widgets i.e. the sticks and switches which
provide the primary functions. A, B, C and D are reserved for the twin axis sticks (one
1
code for each stick axis, that’s two per stick unit) . Ports E, F, G, H and I are for sliders
and switches.
2. Ports S1–S5 and LS are for the secondary switches. Note that the manual uses the term
“changeover/coupling switches” but this is a bit of a mouthful so I’ve shortened it – think of
S as short for “secondary”. Secondary switches are used for a variety of auxiliary
2
functions described later. They cannot be used to drive servos directly. LS is the pupilteacher (“buddy box”) switch but can also be used as a secondary switch if a buddy box is
not in use.
3. The remaining ports are DE for the Digi Adjuster and M for the Model Memory switch.
The majority of this guide is concerned with the primary and secondary widgets (the first two
groups above). For more details, see Appendix A - Mainboard Connections.
Controls
Personalities and Controls
Advanced computer radios recognise that different channels are used for different purposes
and require different adjustments. For example, ailerons often have differential adjustment to
help with axial rolls, while idle trim on the throttle allows the low throttle position to be adjusted
without altering the top end setting. It could be said that aileron and throttle functions have
distinct personalities. The 3030 uses the concept of controls to represent these personalities.
Controls have easily remembered names such as “Aileron”, “Elevator” and “Rudder”.
Control Attributes
3
Each control in the mc3030 has its own set of distinctive adjustable attributes . For example
the Aileron control has EXPO, DUAL RATE, TRAVEL, CENTRE and DIFFER attributes;
while the Spoiler control has FIX.VAL.1, IDLETRIM and NORMPOS attributes.
27 TEST
PPM9
-CTRL$C: AILERON
DIFFER. Ä
+0%_
Attributes are adjusted in the Control Setup menu. Most
attributes have an associated value e.g. the DIFFER is
adjustable between 0 (no differential) and 100 (maximum).
Some attributes appear in several controls, e.g. TRAVEL+/-
1
The stick units have five pin plugs. They are labelled KnL and KnR respectively. KnL corresponds to ports A and B,
KnR to C and D.
2
Unless used with the FIX VAL virtual control.
3
Note that the use of the term attributes is taken from computer programming practice – they are called “options” in
the user manual.
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Programming the Profi mc3030
applies to all the main controls. Others are specific to particular controls, e.g. THR.CURV is
an attribute of the Pitch control, for helicopters.
Assigning Controls to Sticks
As you saw in the Quick Start example, there is no such thing as a ready made “throttle stick”
or “flap switch” on the mc3030. To make a throttle stick, then you must assign the Throttle
control to stick B.
By the same token, if you want the left hand stick to control your airbrakes, then assign
Spoiler to stick B. In other words, always choose the correct control for the task then assign it
to your stick of choice. If you use an inappropriate control you’ll see inappropriate attributes in
the Control Setup menu, and the predefined mixers may not work as you expect.
Control Categories
Controls fall into four broad categories for Aircraft, Boats, and Helicopters, plus the four Aux
controls for simple applications. For a basic control without bells and whistles, consider using
one of Aux 1–4. These have the basic TRAVEL, CENTRE and FIX.VAL.1 attributes.
The programming screens for Controls are
•
•
Assign Controls
Control Setup
For a complete list of controls and attributes see Appendix B - Controls and Attributes. To
adjust attributes see Adjusting the Transmitter Controls on pages 37-43 of the user manual.
Servos and Channel Numbers
A servo is known to the system by its channel number 1 to 9. A servo channel is activated
simply by assigning the servo to a control (or mixer) in the Assign Servo screen. Actual
4
channel numbers are unimportant .
As an aside, flexibility in channel numbering is one of the strengths of the 3030, since you
never need more channels than you have servos. This allows you to use smaller, cheaper
receivers even for applications with sophisticated mixing.
The following screens are used for setting up servos and channels.
•
•
•
•
Assign Servo
Servo Travel
Servo Centre
Servo Limit
For a complete list of controls and mixers see Appendix E - Servo Assignment Targets.
Mixers
In this section we’ll take a brief look at mixers in general. Later on, we’ll look at user mixers in
more detail.
4
A particular servo numbering order must be observed for wing servos when using the BUTTERFL and QUADRO
mixers – see User Manual for the Profi mc 3030 p.81.
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What are Mixers?
We have seen that in order to make a servo respond to a transmitter stick, you must assign a
servo to a control. But what happens if a servo is driven by more than one control – e.g. a V
tail servo responds to both rudder and elevator commands? We have a problem, because the
Assign Servo screen will only allow you to assign a servo to a single control.
However, it will also allow you assign a servo to a mixer. A mixer is nothing more than a list of
two or more controls, conveniently bundled together and given a name. For example The
V.TAIL mixer is just a list of two controls, Rudder and Elevator.
The way it all works as follows: when you assign a servo to a mixer and press the M key in
the Assign Servo screen, the system looks at the mixer’s controls, and sets up a page in the
Servo Travel screen for each control. When you go to the Servo Travel screen, you can use
each “page” to adjust the movement of the servo for the corresponding control. This is called
adjusting the servo mix and the mixer’s controls are commonly referred to as servo’s mixer
inputs.
For example, if you assign a servo to the V.TAIL mixer, when you press the M key two pages
are created in the Servo Travel screen for the servo, one each for Rudder and Elevator
controls.
When do You Need to Use a Mixer?
As we have seen, a mixer is required if the position of a servo is determined by more than
one control. This is very important to understanding the MPX programming system and we’ll
make use of this in the 3-step programming procedures you’ll be using. Mixers can be
categorised into two types: built-in and user-defined.
Built-in Mixers
There are thirteen built-in mixers for specific applications. They have easily remembered
names like DELTA and V.TAIL. For a complete list see Appendix G - Predefined Mixers.
User Mixers
For special requirements where built-in mixers won’t do, you can create user-defined mixers.
We’ll look at these in more detail later on. The following table lists the differences between
built-in and user-mixers.
Table 1 – Comparison of built-in and user- mixers
Mixer Type
Can change
inputs?
Can change
trim mode?
Set-up Procedure
Built In
Mixer
No
No
1.
2.
Assign servo(s) to mixer in Assign Servos
Adjust mixing in Servo Travel
User Mixer
Any controls,
max 4.
Yes
1.
2.
3.
Create a USR1-3 mixer in User Mix screen.
Assign servo(s) to mixer in Assign Servos
Adjust mixing in Servo Travel
Mixer “Outputs”
Although mixers all have between two and four inputs, there is no concept of mixer outputs.
To use a mixer you simply assign a servo to the mixer in the Assign Servo screen. The
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additional pages for the mixer adjustments will automatically appear when you next go to the
Servo Travel screen.
Configuring a Model from Scratch
We’ve looked at the basic architecture of the MPX. Now it’s time to look at a set of procedures
for programming the system from scratch.
At this stage we’re only interested in the basic operation, i.e. getting servos to respond
correctly to the sticks.
The procedures are completely general: although the examples are based on gliders, they
can be applied to model of varying types and complexity, and you will see the same steps
repeated all the way up to the complex F3F example.
The steps involved in basic set-up are as follows:
STEP ONE:
Assign controls - specify sticks and sliders to be used for primary controls.
STEP TWO:
Assign servos – assign servos to controls and/or mixers.
STEP THREE: Adjust servo centres, travel and mixing.
EXAMPLE 1: V-tail Soarer
We’ll use a V-tail glider as the subject of our first example.
•
•
The model has two servos driving the V-tail and two servos driving the ailerons.
The V-tail functions as a both a Rudder and Elevator.
Step One: Assign Controls
The first step is to decide which sticks and widgets are to use. This information is needed for
the Assign Controls screen which is the first one you’ll use. Don’t concern yourself about the
servos at this stage or about secondary functions like Dual Rates etc – you should be
concerned just with the controls as listed in Appendix B - Controls and Attributes. For our
example a typical assignment would be as follows:
Table 2 - Control Assignments for V-tail Glider
Control
Widget
Rudder
A (left stick left/right)
Aileron
C (right stick left/right)
Elevator
D (right stick up/down)
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You can now invoke the Assign Control screen to set up these assignments. Make sure
unused widgets are set to UNUSED. Here are the three assignments as they appear in the
Assign Control screen:
27 TEST
PPM9
ASSIGN CTRL. CONTROL
AÄ
IS
RUDDER_
27 TEST
PPM9
ASSIGN CTRL. CONTROL
CÄ
IS
AILERON_
27 TEST
PPM9
ASSIGN CTRL. CONTROL
DÄ
IS
ELEVATOR_
Step Two: Assign Servos
You’ve linked the controls to the widgets. It’s now time to think about the other part of the
process, linking your servos to the controls. This is the most complex part of the process as it
may involve choosing a mixer, so it’s broken down into a further set of steps.
Create the Servo Assignment table
Start by making an empty table like Table 3, with one row per servo. The columns are as
follows:
•
•
•
•
•
Servo – description and location of the servo e.g. “V-Tail left”.
Channel – the channel number 1 – 9.
Controls – a list of one or more controls affecting the servo. All the controls in Table 2 will
be listed at least once somewhere in this column.
Servo Assigned To – the control or mixer that the servo is assigned to in the Assign
Servo screen.
Servo Travel Pages – a list of one or more “pages” which will appear in the Servo Travel
screen for the servo.
Specify Channel Numbers
Enter the servo descriptions and their channel numbers into the table. If you’re using a
miniature receiver with four or five channel outputs, you’ll want to use the low channel
numbers.
Table 3 –servo assignment table with channel numbers
Servo
Channel
V-tail LEFT
1
V-tail RIGHT
2
Aileron LEFT
3
Aileron RIGHT
4
Controls
Servo assigned to
Servo Travel Pages
List Controls
You now have to list the controls which will affect each servo. The easiest way is to imagine
you’re sitting in front of your model with the transmitter on, waggling the controls. Imagine
which servos move when you activate each control in Table 2, and make corresponding
entries in the Controls column.
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In our V-Tail example, displacing the elevator stick will move servos 1 and 2, so enter
“Elevator” in the Controls column of channels 1 and 2. Displacing the rudder stick also moves
servos 1 and 2, so add “Rudder” as well to channels 1 and 2.
When you move the aileron stick, only the aileron servos move, so enter “Aileron” in the
Controls column of channels 3 and 4. The table ends up like this:
Table 4 – servo assignment with controls
Servo
Channel
Controls
V-tail LEFT
1
Rudder, Elevator
V-tail RIGHT
2
Rudder, Elevator
Aileron LEFT
3
Aileron
Aileron RIGHT
4
Aileron
Servo assigned to
Servo Travel Pages
Choose Mixers
Now we need to determine the controls and mixers to use in the Assign Servos screen. A
servo can be assigned to either a control or a mixer. The rule is:
•
•
If one control is specified, the servo is assigned directly to the control.
If more than one control are specified, assign the servo to a suitable mixer.
In our example, the two aileron servos on channels 3 and 4 are driven solely by the Aileron
control, so no mixer is required for these. We therefore enter “Aileron” in the fourth column.
However, servos 1 and 2 are each driven by both rudder and elevator controls so we cannot
assign each directly to a single control – we must assign them to a mixer.
To determine which mixer to use, turn to Appendix G - Predefined Mixers and look for a mixer
which (a) has at least Rudder and Elevator as inputs, and (b) looks like it is designed for the
task!
Both the V.TAIL and V.TAIL+ mixers are suitable candidates. Note that the V.TAIL+ mix has
Spoiler and Flap inputs in addition to Rudder and Elevator. Let’s use the plain V.TAIL mixer
first. Here is the assignment table with the addition of the VTAIL mixer:
Table 5 – Servo Assignment Table (cont.)
Servo
Channel
Controls
Servo assigned to
V-tail LEFT
1
Rudder, Elevator
V.TAIL (mixer)
V-tail RIGHT
2
Rudder, Elevator
V.TAIL (mixer)
Aileron LEFT
3
Aileron
AILERON
Aileron RIGHT
4
Aileron
AILERON
Servo Travel Pages
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List Servo Travel Pages
In this step you list the pages which will appear in the Servo Travel screen.
•
•
If the servo is assigned to a mixer in column 4, enter the names of all the inputs to the
mixer into column 5. The complete list of inputs is in Appendix G - Predefined Mixers.
Unused inputs must have the operating mode set to OFF.
If the servo is assigned to a control in column 4, copy the name of the control into
column 5.
We end up with the following table:
Table 6 – Completed servo assignment using V.TAIL mixer
Servo
Channel
Controls
Servo assigned to
Servo Travel Pages
V-tail LEFT
1
Rudder Elevator
V.TAIL
Rudder, Elevator
V-tail RIGHT
2
Rudder Elevator
V.TAIL
Rudder, Elevator
Aileron LEFT
3
Aileron
AILERON
Aileron
Aileron RIGHT
4
Aileron
AILERON
Aileron
What if we envisaged using Spoiler control at a later date? In that case we’d be better off
starting with the V.TAIL+ mixer. Note that I’ve marked Flap and Spoiler inputs as “off”, in fact
in this particular example Flap and Spoiler controls are not used so these mixer inputs are
inactive anyway.
Table 7 – Completed servo assignment using V.TAIL+ mixer
Servo
Channel
Controls
Servo assigned to
Servo Travel Pages
V-tail LEFT
1
Rudder Elevator
V.TAIL+
Rudder, Elevator, Spoiler(OFF), Flap(OFF)
V-tail RIGHT
2
Rudder Elevator
V.TAIL+
Rudder, Elevator, Spoiler(OFF), Flap(OFF)
Aileron LEFT
3
Aileron
AILERON
Aileron
Aileron RIGHT
4
Aileron
AILERON
Aileron
The servo assignments are now complete, so go to the Assign Servos screen, assign
Channels 1 and 2 to V.TAIL (or V.TAIL+):
27 TEST
PPM9
ASSIGN SERVO SERVO
1Ä
IS
V-TAIL+_
27 TEST
PPM9
ASSIGN SERVO SERVO
2Ä
IS
V-TAIL+_
Assign channels 3 and 4 to AILERON:
27 TEST
PPM9
ASSIGN SERVO SERVO
3Ä
IS
AILERON_
27 TEST
PPM9
ASSIGN SERVO SERVO
4Ä
IS
AILERON_
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That’s the end of the Step Two – we now have now completed the routing of servos to
controls to sticks and switches.
Step Three: Adjusting Servo Travel and Centre
Now it’s time to get the model out and adjust the servos!
Use the Servo Centre screen to adjust the centre offset of each servo.
Next, use the Servo Travel to adjust the servo travel and mixing. Each servo has one page
for each inputs affecting that servo – these are the ones you identified in the “servo travel
pages” column of Table 6 and Table 7. The example screen shots show the pages for
elevator and rudder mixer inputs for servo 1.
27 TEST
PPM9
;SER.1: V.TAIL+
PART :ELEVATORÄ
, +30% D#
ON _
27 TEST
PPM9
;SER.1: V.TAIL+
PART : RUDDERÄ
, +30% A§
ON _
These page shows that (a) pulling back on the elevator stick D causes 30% movement on
servo 1, and (b) moving rudder stick A full left generates 30% movement in the same servo.
Each of these inputs is currently ON, although later we’ll see how they can be controlled via a
secondary switch.
If an input is unassigned, the system displays “CONTROL?” along the bottom line. In our
example, the V.TAIL+ mixer has Flap and Spoiler inputs which are unassigned - in this case
because we’re not using them, not because we forgot to assign them!
27 TEST
PPM9
;SER.1: V.TAIL+
PART : SPOILERÄ
,CONTROL?
ON _
For more information refer to:
•
•
•
Appendix H - Program Screens (p.45)
Adjusting Servo Travel (p.16)
Adjusting Servo Centre (p.17)
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EXAMPLE 2: 60” Pylon Racer
Let’s look at a real world example, that of a 60” pylon racer class model. A typical example
would have the following features:
•
•
•
•
Two servos in the wing, one for each aileron.
Two servos in the fuselage operating the V tail.
“Aileron brakes”. This is a simplified version of true crow brakes for models which do not
5
have flaps. When spoiler is applied, both ailerons move upwards together .
SpoileràElevator mixing to compensate for the pitch-up generated by crow brakes.
After you’ve done the basic set-up for the above, you’ll see how to add:
•
•
Snapflap (ElevatoràAileron mixing)
Coupled Ailerons and Rudder (optional)
How do you implement such a seemingly complex configuration? The answer is “exactly the
same as before” - there’s just a little more data entry involved!
Step One: Assign Controls.
The first example had three controls Rudder, Elevator and Aileron. Our pylon racer also has
simple crow brakes operated from the left-hand stick. Spoiler is the most appropriate control
6
for crow brakes because there is a special BUTTERFL mixer for this purpose . And since we
will use the left-hand stick to operate spoiler, the modified control assignment is as follows:
Table 8 - Control Assignments with Addition of Spoiler
Control
Port (widget)
Rudder
A (left stick left/right)
Aileron
C (right stick left/right)
Elevator
D (right stick up/down)
Spoiler
B (left stick up/down)
Step Two: Assign Servos
The servo assignment is similar to Example 1, except for the addition of spoiler control. Here
are the steps in detail.
List Controls
Let’s take the Example 1 as a basis and see the effect of adding a spoiler control. As before
imagine you’re controlling the model, moving the Spoiler stick.
What is the effect on the servos? Moving the spoiler stick will cause both ailerons to move
upwards. At the same time we want both V-tail surfaces to move down to compensate for the
5
Crow brakes normally use separate flaps and ailerons, but the flaps can be dispensed with for smaller models.
6
“Butterfly” and “crow” mixing are synonymous.
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resulting nose-up trim change. Therefore all four servos are affected by moving the Spoiler
stick, so we need to add Spoiler to the list of controls for every servo. Here is the Servo
Assignment table modified to take into account the Spoiler control:
Table 9 – Servo Assignment with Spoiler Control
Servo
Channel
Controls
V-tail LEFT
1
Rudder, Elevator, Spoiler
V-tail RIGHT
2
Rudder, Elevator, Spoiler
Aileron LEFT
3
Aileron, Spoiler
Aileron RIGHT
4
Aileron, Spoiler
Servo Assigned to
Servo Travel Pages
Choose Mixers
To recap, for each servo,
•
•
If a single control is specified against a servo, assign the servo directly to that control.
If two or more controls are specified, assign the servo to a suitable mixer.
In this case, all the servos must be assigned to mixers since each box in the Controls column
contains two or more entries. There are two groups of inputs – Rudder + Elevator + Spoiler
for the V-tail servos, and Aileron + Spoiler for the Aileron servos.
Scanning through the definitions of the predefined mixers shows you will see that we can use
two mixers, BUTTERFL for Aileron and Spoiler inputs and VTAIL+ for Rudder, Elevator and
Spoiler inputs. Note that with this scheme, the Spoiler control is an input to two mixers – that
is perfectly valid.
Having chosen the mixers, we can now enter them in column 4 of the servo assignment table:
Table 10 – Servo Assignment Table (cont.)
Servo
Channel
Controls
Servo Assigned to
V-tail LEFT
1
Rudder, Elevator, Spoiler
V.TAIL+
V-tail RIGHT
2
Rudder, Elevator, Spoiler
V.TAIL+
Aileron LEFT
3
Aileron, Spoiler
BUTTERFL
Aileron RIGHT
4
Aileron, Spoiler
BUTTERFL
List Servo Travel Pages
To recap: in this step you complete the last column showing what pages will appear in the
Servo Travel screen. Again there are two possibilities depending on whether the servo is
assigned to a mixer or directly to a control.
•
•
If the servo is assigned to a mixer in column 4, enter the names of all the inputs to the
mixer into column 5. To get the complete list of inputs, see Appendix G - Predefined
Mixers. Unused inputs must be disabled, i.e. have the operating mode set to OFF.
If the servo is assigned to a control in column 4, copy the name of the control into
column 5.
In this example all the servos are assigned to mixers rather than controls.
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Table 11 – Completed servo assignment table
Servo
Channel
Controls
Servo Assigned to
Servo Travel Pages
V-tail LEFT
1
Rudder, Elevator, Spoiler
V.TAIL+
Rudder, Elevator, Spoiler, Flap(OFF)
V-tail RIGHT
2
Rudder, Elevator, Spoiler
V.TAIL+
Rudder, Elevator, Spoiler, Flap(OFF)
Aileron LEFT
3
Aileron, Spoiler
BUTTERFL
Aileron, Spoiler, Elevator(OFF), Flap(OFF)
Aileron RIGHT
4
Aileron, Spoiler
BUTTERFL
Aileron, Spoiler, Elevator(OFF), Flap(OFF)
Step Three: Adjusting Servo Travel and Centre
Note that in this example, there is no flap control used (i.e. the Flap has not been assigned to
a stick). So any Flap inputs to the V.TAIL+ mixer are ignored in the servo travel pages.
However, the Elevator control is assigned to a stick, so remember to set the mode to OFF for
the elevator pages for servos 3 and 4.
Extra Steps: Adding Bells and Whistles
We’ve seen how to do the basic set-up for our pylon racer model. Let’s see how to soup
things a bit – hopefully without needing to completely re-programme the model. After all you
don’t want to have to completely reconfigure the system just to add a little bit more mixing!
Adding Elevatorà
àAileron mixing (“snap-flap”)
7
Now let’s add snap-flap mixing. 60” racers do not generally have separate flaps, but it’s quite
common in such models to use the ailerons as flaps for the purposes of snap-flap.
The changes are quite straightforward.
Let’s look at the servo assignment table again and do the usual trick of pretending to control
the model. Now when we pull back on the elevator stick, the ailerons droop slightly, so we
must add Elevator to the list of controls for the aileron servos.
Table 12 – Servo assignments after addition of snap-flap mixing
Servo
Channel
Controls
Servo Assigned to
Servo Travel Pages
V-tail LEFT
1
Rudder, Elevator, Spoiler
V.TAIL+
Rudder, Elevator, Spoiler, Flap(OFF)
V-tail RIGHT
2
Rudder, Elevator, Spoiler
V.TAIL+
Rudder, Elevator, Spoiler, Flap(OFF)
Aileron LEFT
3
Aileron, Spoiler, Elevator
BUTTERFL
Aileron, Spoiler, Elevator(S1), Flap(OFF)
Aileron RIGHT
4
Aileron, Spoiler, Elevator
BUTTERFL
Aileron, Spoiler, Elevator(S1), Flap(OFF)
You also now need to check that the mixer for channels 3 and 4 can handle the extra Elevator
control. Fortunately BUTTERFL can handle elevator inputs – no great surprise as it was
designed for crow brake applications.
7
Snap-flap i.e. elevatoràflap mixing is often used for aerobatic and F3F soarers.
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Another little change: since elevator is now used as input to the BUTTERFL mixer, the “OFF”
qualification against Elevator in the last column has been replaced with “S1” – this means
snap flap mixing can be switched on and off using switch S1. This is jumping ahead a bit we’ll learn more about the use of secondary switches for this purpose later - this technique for
disabling specific mixer inputs in flight is often of use.
You’ll see that the Flap control is disabled in all the servo travel pages. In fact you don’t need
to do this explicitly since the Flap control is not used on this model, however you can see that
adding a flap control for a full-house F3F or F3B machine should mean very little extra work!
Adding Coupled Ailerons and Rudder
Let’s add coupled ailerons and rudder (“CAR”). This is set in a
special screen as shown at left. It can be added retrospectively
to an existing model set-up. In fact you don’t need to consider
rudder and aileron coupling at all when creating the Servo
Assignment table for a new model, just configure it assuming no
CAR, then add it later. For more information see Coupled Ailerons and Rudder (p.23).
27 TEST
PPM9
COMBI-SW:
OFFÄ
FOLLOWING:
0%_
RUDDER$AILERON
More about Servo and Control Adjustments
Let’s take a step back and look at some tips and tricks to make life simpler when setting up
the model. As with many computer radios, there are often several ways of accomplishing the
same goal. We’ll now focus on the different ways of adjusting servo travel and centring.
Adjusting Servo Travel
There are two ways to adjust servo travel.
Using the Servo Travel Screen
The Servo Travel screen operates on individual servos. Use this screen to set the servo
travel on the bench before the first flight.
Using the TRAVEL Attribute
The TRAVEL+/- and TRAVEL attributes affect the travel of all servos affected by a control
both directly or via mixers. For example if you are using a BUTTERFL mixer and you increase
the TRAVEL of the aileron control, it will increase the travel of both ailerons and flaps.
TRAVEL+/- is an attribute of Elevator, Rudder, Aux and some of the heli controls and allows
travel adjustment in each direction. TRAVEL (i.e. without the +/-) is used for the Aileron
control and adjusts travel in both directions together – this ensures that differential settings
are preserved.
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Adjusting Servo Centres
As with servo travel adjustment, there are two ways to adjust servo centres.
Using the Servo Centre Screen
The Servo Centre screen is used to centre individual servos, during initial set-up of the model
or when readjusting due to a bent linkage. Adjust each servo till the centre is perfectly set
using whatever reference is necessary, e.g. control surfaces lining up etc.
Using the CENTRE Attribute
To adjust the trim centres, adjust the CENTRE attribute of the control. This affects all servos
affected by a control either directly or via a mixer. You can use CENTRE to re-centre your
trim levers following a flight trimming session. The way this works is as follows: when you
displace the trim lever, the system alters the value of the CENTRE attribute to reflect the
amount of trim which has been applied. You can see this happening in real time as follows:
7. Go into Control Setup, select the Aileron control and the CENTRE attribute.
8. Move the Aileron trim slider and watch CENTRE value change.
If you you’ve made some trim adjustments using the trim lever, and want to move a trim lever
back to the centre detent,
9. Note the value of the CENTRE attribute.
10. Move the trim lever back to the centre detent. Watch the value of the CENTRE attribute
change as you do this!
11. Restore CENTRE to the value in (1) above using the Digi Adjuster or +/- keys.
Note that not all controls have a CENTRE attribute. See Appendix B - Controls and Attributes
for the complete list.
Adding Spice: Secondary Switches
Let’s recap: so far you’ve learnt how to configure your sticks, you’ve got them to move the
servos correctly, the mixers are properly configured, the servos are centred and they have the
correct travel in both directions – every thing is working in a nice linear fashion. In fact at this
point you could quite happily go out and fly the model.
However with many models there will be situations where you don’t want things to work in a
nice linear fashion. You may want to switch certain functions off, or over-ride a particular
proportional function (e.g. suppress spoiler operation) or send a servo to a fixed position (for
flaps). This is where secondary switches come in handy.
Secondary switches are used in a number of ways in the MPX 3030
(1) To activate mixer inputs.
(2) To activate the DUALRATE, FIX.VAL.1 and FIX.VAL.2 control attributes.
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(3) To activate CAR (Coupled Ailerons and Rudder).
(4) To trigger the Timer function.
(5) To operate the FIX VAL virtual control.
Secondary switches are implemented in three different ways which we’ll look at in the
following sections.
Secondary Switches S1–5, L/S
Ports S1-5 and L/S use 2-position switches. They can present two states (on/off) to the
system software.
Secondary Switch “SI”
We have already seen the port I can be used for primary controls just like A-H. Alternatively it
can be used either as a secondary switch where it is identified as “SI” in the screens. (note
“ess eye”, not “ess one”!).
SI is different to the two position switches S1-5, because it can present three states to the
system software. It therefore requires a 3-position switch in this role. If you haven’t got a
spare 3-position switch then you can use the 3-position switch supplied for G – remove the
back of the transmitter, disconnect the plug in port G, and reconnect it to port I.
The three states are:
•
•
•
Switch at one side: ↑
Switch at other side: ↓
Switch in the middle: Off.
The system software uses the Off state of to provide a second preset position for Flap, via the
FIX.VAL.2 attribute. There are other undocumented uses of the Off state which we’ll see later.
Using SI for 2 preset flap positions.
SI provides a second preset position for the flap control – this feature is only available via SI
and only if a 3-position switch is plugged into port “I”. Here’s how you do it:
1. Go into Control Setup screen, and select Flap, and move to the FIX.VAL.1 attribute.
2. Set the value for FIX.VAL.1 and set the mode to SI. This sets the first preset position.
3. Change the mode from Off to SIá. At this stage the screen will look something like:
27 TEST
PPM9
;CTRL$E:
FLAP
FIX.VAL.1Ä
,SI'
60%_
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4. Move to the FIX.VAL.2 attribute. The menu displays “FIX.VAL.2 (only SI)”. Set the value
for FIX.VAL.2. This sets the second preset position:
27 TEST
PPM9
;CTRL$E:
FLAP
FIX.VAL.2Ä
(only SI)
10%_
With SI at either side of its travel, the two preset positions of 10% and 60% kick in. With SI in
the centre position the flap is controlled as normal by the slider it’s assigned to.
Secondary switch “Gx“
Gx is a “virtual” secondary switch, i.e. it’s a software switch, not a physical switch like S1-5.
However it can be used anywhere S1–5 are used. It is triggered by moving a primary stick
A-H past a user-definable position.
Typical uses are to trigger the Timer function from the towhook release control, or to switch
dual-rate setting as the throttle stick is moved from low to high, or to disable snap-flap mixer
inputs when flaps are applied.
In the Soft Switch screen, you assign the “master” widget and the trigger point. Afterwards,
wherever you can use a secondary switch you’ll see an additional choice in the secondary
switch menus, called SA, SB, SC, SD, SE, SF or SG depending on the master widget.
Choosing the Correct Type of Secondary Switch
As you’ve seen there are three different types of secondary switch, S1-S5, SI, and Gx. How
do you choose the right one for a particular application?
•
•
If you want a switch to set two preset positions for flaps, SI is the only choice.
For other cases choose S1-S5 if you want to flick a switch, or Gx if you want to trigger the
function via from another control.
Setting up Ailerons, V-tails and Spoilers
Setting up Ailerons
The mc3030 allows easy adjustment of differential and control sensitivity, with a single point
of adjustment for each, but to take advantage of this you need to be systematic in the way
you set up the model.
1. When setting up on the bench, turn off DIFFER (by setting to zero, or disabling it), and
use the Servo Travel screen to obtain maximum servo travel (subject to the mechanical
limits of the hinges) and make sure there is equal movement in both directions.
2. If differential is required, simply dial in a suitable figure say 50% for the Aileron’s DIFFER
attribute using the Control Setup screen for Aileron. The downgoing movement servos
will now be ½ the movement of the upgoing movement. If you find that the upgoing
aileron is affected instead of the downgoing, reverse the DIFFER value.
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3. During flight trials, you can reduce the control movement of all the aileron servos
together, using the Control Setup screen and the TRAVEL attribute. Or you can change
8
the differential for all servos at once simply by altering the DIFFER attribute .
Limiting Servo Travel
We’ve already seen in the examples how to set up V-tail mixing. One further consideration is
the effect of applying rudder and elevator together. If the individual controls have a large
amount of movement, then it’s possible that applying both rudder and elevator together will
cause one control surface to try to exceed the mechanical limits of the hinge. To prevent this,
there are three options:
1. Reduce the value of the TRAVEL attribute for each control.
2. Reduce the travel of individual servos, using the Servo Travel screen.
3. Use the Servo Limit screen to limit servo movement.
The first two methods are the least satisfactory as they reduce the sensitivity of the individual
controls. The third method preserves sensitivity, but bear in mind that control surface
movements will be non-linear when both inputs are at a maximum.
Setting up Spoilers
Spoilers are supported in two ways on the mc3030 (a) by the Spoiler controls attributes, and
(b) by three special mixers.
The Spoiler Attributes
There are many different types of design of spoiler: letter-box, scissor airbrakes, crow brakes
(2- and 4-servos) and canopy brakes spring to mind. Fortunately the Spoiler attributes
NORMPOS and IDLETRIM have been design to deal with all these variants so you can use
the Spoiler control for any of these applications. Let’s look at these attributes in more detail.
NORMPOS
You set the NORMPOS attribute to indicate to the system software the position of your stick
for “spoiler closed”. Unlike other controls there is no convention for the direction of operation
of the spoiler stick or slider – some pilots have forward-to-open, others back-to-open. The
system must have this information in order to calculate how far the spoiler is displaced from
the “closed” position. In practice there is a bug in v3.0! We’ll come to that later.
IDLETRIM
With letterbox and scissor-action spoilers, it’s often desirable to be able to fine adjust the
“spoiler closed” side of the servo travel without affecting the “open” side. This lop-sided trim
function is called Idle Trim, a term borrowed from power flyers who need to do the same sort
of thing with Throttle – in fact Idle Trim is also available on the Throttle control.
If you are using stick B or D to operate spoiler you can use the Idle Trim attribute to control
the maximum trim range at idle. The larger the value of Idle Trim, the greater the trim range
in the “closed” side. Whatever value is set, the trim range decreases progressively to zero as
8
You can even do this in flight using the DigiAdjuster, but remember to close the flap to the programming panel first!
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the spoiler is opened so that at fully open, displacing the trim lever has no effect. Note Idle
trim does not operate with the BUTTERFL mixer as neutral adjustment is handled via the
aileron and flap trim levers.
Mixers for Spoilers
In addition to the Spoiler attributes, there are three built-in mixers designed for use with the
Spoiler control. These are called BUTTERFL, ELEV MIX, and V.TAIL+.
The BUTTERFL Mixer (and the NORMPOS Bug!)
The BUTTERFL mixer is used to implement crow-brake and snapflap (elevatorèflap) mixing
for F3x models. You assign all the wing servos to the BUTTERFL mixer. As we have seen in
the 60” racer example, it can also be used for simple “ailerons up” braking in 2-servos-in-wing
models by disabling the Flap input.
The BUTTERFL mixer also provides aileron differential suppression: as full crow is applied,
any aileron differential is gradually reduced until at full spoiler the differential is zero. This
provides better aileron control when crow brakes are deployed. However because of a bug in
the software, it only works properly if NORMPOS = á. If you set NORMPOS = â, aileron
differential is suppressed when the brakes are closed, which is the opposite of what’s
required.
The ELEV and V.TAIL+ Mixers
A side effect of applying crow brakes is to apply a nose-up pitching moment. To compensate
for this you will need SpoilerèElevator mixing so that some down elevator movement is
applied as brakes are deployed. For a V-tail model assign the V-tail servos to the V.TAIL+
mixer. For a conventional tail model, assign the elevator servo to ELEV MIX. Each of these
mixers has Spoiler and Elevator inputs.
In fact, a common configuration for F3F, F3J and F3B models is to use BUTTERFL together
with either ELEV MIX or V.TAIL+.
Scissor, Letterbox and Canopy brakes
Simple brakes such as scissor, letterbox and canopy brakes can be set up without complex
mixing:
1. Assign the Spoiler control to a suitable widget, normally the left hand (ratchet) stick.
2. Assign the airbrake servo to the Spoiler control.
3. If you want mix spoilerèelevator for elevator trim compensation, then
•
•
for a conventional tail model, assign the Elevator servo to the ELEV MIX mixer.
for a V-tail model, assign the V tail servos to the V.TAIL+ mixer.
4. To adjust the spoiler-closed position using the trim lever, set the Spoiler control’s
IDLETRIM attribute to a suitable value.
Disabling Spoiler via a Switch
Sailplane pilots often use the left hand stick to control spoiler. However, if the same stick is
used to operate the rudder, it’s possible to nudge the spoiler accidentally, with undesirable
consequences.
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Consequently a switch is often used to disable the spoiler function during normal flight,
enabling the spoiler only during the landing phase. There are two ways to program a switch to
do this: the obvious way – and a better way.
Method 1 – disable mixer inputs
The obvious way is to use a switch say S1 to disable all “Spoiler” mixer inputs. To do this you
do the following for each servo affected by the spoiler control:
1. Go to the Servo Travel screen
2. Go to the Spoiler page
3. Assign S1, so that when S1 is active, the spoiler input is disabled.
4. Repeat steps 1-3 for all servos affected by the spoiler control
There are two problems with this method:
First, we need to repeat this adjustment for several servos, in a six servo F3F model this can
be very tiresome.
Secondly, this doesn’t completely solve the problem if BUTTERFL mix is used. Because of a
bug/feature in the operating system, aileron differential suppression (one of the special
features of BUTTERFL) is affected by the spoiler stick position even if all spoiler inputs to the
BUTTERFL mixer are disabled.
To demonstrate this:
1. Set up a model with the BUTTERFL mixer and with say 50% aileron differential
2. Disable the spoiler according to the instructions above.
3. Switch on the radio, and with full aileron applied, move the spoiler stick up and
down…
See how the varying aileron differential suppression affects one of the ailerons, even though
crow operation (where both ailerons go up) is suppressed correctly.
Method 2 – Using FIX VAL
A simpler solution is to use a secondary switch to enable Spoiler’s FIX.VAL.1 attribute. This
also deals with the aileron differential suppression problem. Here’s how it works:
With FIX VAL active, the spoiler control appears to be at a fixed position, irrespective of the
actual position of the stick. By setting FIX VAL to the value corresponding to the “spoiler
closed” position, we can effectively use the switch to disable the spoiler: in one position (FIX
VAL enabled) the spoiler is closed, in the other (FIX VAL disabled) it’s governed by the stick
position as normal.
1. Go to the Control Setup screen
2. Choose the Spoiler control,
3. Choose the FIX.VAL attribute and set the value to zero, corresponding to the spoiler
closed position.
4. Change the FIX VAL “mode” from OFF(inactive) to S1-5 (controlled by a switch).
Using this method, only one adjustment has to be made and aileron differential suppression is
switched off when the spoiler is disabled as you would expect.
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Coupled Ailerons and Rudder
9
CAR is the traditional acronym for Coupled Ailerons and Rudder . CAR mixing is always
available if Rudder and Aileron controls have been assigned.
CAR is set in the Combi Switch screen. It operates in three modes – ON, OFF or controlled
10
by a secondary switch. The default mode is OFF.
Normally, it would be set up so that aileron is the primary control and rudder is the slave
however it can be set for reverse operation.
CAR differs from user and built-in mixers as follows
•
•
•
It has its own dedicated screen.
It works with other mixers. For example, CAR can be added retrospectively to a set-up
which uses a V.TAIL mixer.
You do not need to take it into account when planning a new configuration – you can
easily add it afterwards.
The FIX VAL Virtual Control
11
The FIX VAL virtual control is new in version 3.0 of the system software. The fly-sheet for
v3.0 states “The FIXED VALUE facility also opens up some interesting new possibilities in
conjunction with the USR-MIX mixers.”
So what’s the difference between the FIX VAL control, and the regular controls like Aileron,
Elevator etc?
First, FIX VAL only provides a two-position function, it can’t be used for proportional control.
Second, you don’t assign it using the Assign Control screen. Instead you assign a servo to
FIX VAL in the Assign Servo screen. Then you go to the Servo Travel screen and assign a
secondary switch. When the switch is active, the servo moves to the position set in Servo
Travel, when inactive, the servo goes to neutral as set in Servo Centre.
FIX VAL therefore provides a method of activating a servo for simple 2-position applications
as an alternative to using a primary widget D-H. Note that whichever method you choose, you
only get ½ servo travel (from neutral to one end-point). We’ll see a way around this later on
using a user mixer.
You can assign as many servos as you like to the FIX VAL control limited by the number of
secondary switches and channels available. Each servo will see its own “clone” with its own
centre and end point and switch mode.
Since FIX VAL is a control – albeit a strange one - it can be used as an input to a user mixer.
And like other controls, you can even specify the FIX VAL control as all the inputs to the same
9
CAR was common even before the days of computer radios, because as the name suggests, it’s a coupling rather
than a mixing function which can easily be implemented mechanically.
10
It’s acceptable to have CAR permanently on when if you are new to ailerons. However, for experienced pilots CAR
hinders rather than helps co-ordinated turns. In a high aspect ratio sailplane for example, to do a turn without skid or
slip, rudder is normally maintained throughout the turn, but ailerons are used only to roll into and out of the turn and
neutralised or even reversed once the correct angle of bank has been achieved.
11
Not to be confused with the FIX.VAL attribute, which is used for setting preset positions for some controls.
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Programming the Profi mc3030
mixer. Each mixer input sees its own independent “clone” of FIX VAL. When you assign a
servo, the Servo Travel shows a separate page for each input.
The use of FIX VAL in conjunction with user mixers does indeed provide some interesting
possibilities including the ability to provide full servo travel from a standard 2-position switch –
we’ll see an example later.
Managing Model Memories
The 3030 provides to manage the 99 memories available. You can move from one model
memory to another. You can erase memories. You can also copy one memory to another
one. There are two main uses for this:
1. Provide a second or third configuration for the same model, for different phases of
flight e.g. for F3B you might have launch, cruise, duration memories. By keeping
these memories in consecutive memory locations, and assigning the models names
with a number sequence in the last character, you can switch between memories
using the M switch in flight. Bear in mind that if you need to re-centre a servo for any
reason, you’ll need to repeat the adjustment across all the memories which is
tiresome. Quite a lot can be accomplished by means of a single memory and
changeover switches which is my preferred method for F3F. Your mileage may vary.
2. Use one memory as your “main” memory, and another as your “working” memory for
experimenting with different settings etc. When you’re happy with your working
memory, copy it to your main memory. This is my favoured approach.
The naming conventions in the manual are a little confusing, “File” is used in the program
while “List” is used in the manual. They both refer to what is conventionally know as a model
memory.
Memory management is one of the few weak areas in the system. Here are some gotchas.
First, Multiplex don’t provide a backup program to transfer configurations to a PC. This is
essential in my view – I have heard of two users (of another brand radio) who lost all their
settings when the Lithium backup battery failed. Another MPX owner almost ran over his set
with his car. Fortunately there are a couple of third-party sources of backup software. mcTool
from Airworld does this job very well. The software is simple and robust – their web site is
http://www.airworld.de. At the time of writing the software is in German but they are
considering an English version.
Neil Gillies of Seagull Technology produces sMPX which is a very reasonably priced
shareware backup program for the 3030 with some neat features such as the ability to shuffle
memories off-line. See http://www.sea-gull.demon.co.uk.
The second gotcha is a user-interface problem which makes it easy to accidentally erase
memory 15. When you’re in the File Copy screen, if you cycle the copy mode past the
“EXPORT” option and the current memory number is greater than 15, the memory number
jumps to 15. If you don’t notice this, and delete what you think is your current model memory,
you’ll end up deleting memory 15. The cure is not to use memory 15!
The third gotcha concerns copying a model memory in Full mode. The model name is copied
along with the data, leading to duplicate names. When copying in Controls Only mode the
original name is retained, so the user interface is rather inconsistent in this area.
That’s all I’ll say about model memories here - there’s a full treatment in the user manual.
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EXAMPLE 3: F3F machine
Let’s now consider a sophisticated set-up – that of a racing F3F model. The purpose of this
example is to demonstrate practical uses for some of the more advanced techniques, such as
the secondary switches and Gx switch.
The example is based on my Ellipse 2V machine which is set up for F3F slope racing.
The Requirements for F3F
Obviously different pilots have their own ideas about how a model should be set up. The first
step for any complex model, or programming task for that matter, is to define the
requirements. Here are my requirements for a V-tail model for F3F competition such as the
Ellipse 2V.
V-tail
•
•
Rudder/Elevator (V-tail) mixing.
Coupled Ailerons and Rudder activated via switch or by flap setting.
Wing
•
•
•
•
•
Crow brake on throttle stick, suppressible from a switch to prevent inadvertent operation
during cruising flight.
Elevator trim compensation for crow brake.
3 preset positions for flap: “speed”, “normal”, “thermal”.
Flaps applied to both inboard and outboard wing surfaces.
Elevator à Flap (“snap flap”) mixing. Automatically disabled when flaps are deployed.
Control Assignments
The only change from the 60” Pylon Racer example is the addition of flaps which are
activated by a 3-position switch on G.
Table 13 – F3F control assignments
Control
Port (widget)
Rudder
A (left stick left/right)
Aileron
C (right stick left/right)
Elevator
D (right stick up/down)
Spoiler
B (left stick up/down)
Flap
G (3-position switch)
Servo Assignments
By this stage you should be familiar with the steps involved in building the servo assignment
table. The method is exactly the same as the previous examples, there’s just more of it! So I
won’t repeat the steps in detail.
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Table 14 – F3F servo assignments
Servo
Channel
Controls
Servo Assigned to
Servo Travel Pages
Aileron RIGHT
1
Aileron, Spoiler, Elevator,Flap
BUTTERFL
Aileron, Spoiler, Elevator(Gx), Flap
Aileron LEFT
2
Aileron, Spoiler, Elevator,Flap
BUTTERFL
Aileron, Spoiler, Elevator(Gx), Flap
Flap RIGHT
3
Spoiler, Elevator,Flap
BUTTERFL
Aileron(OFF), Spoiler, Elevator(Gx), Flap
Flap LEFT
4
Spoiler, Elevator,Flap
BUTTERFL
Aileron(OFF), Spoiler, Elevator(Gx), Flap
V-tail LEFT
5
Rudder, Elevator, Spoiler
V.TAIL+
Rudder, Elevator, Spoiler, Flap(OFF)
V-tail RIGHT
6
Rudder, Elevator, Spoiler
V.TAIL+
Rudder, Elevator, Spoiler, Flap(OFF)
Channel numbers 1-4 are assigned alternately to Aileron Right/Left then Flap Right/Left. This
is required for correct operation of aileron differential (see the user manual, p. 33).
There’s a lot of mixing going on here. Let’s see what’s going on with the aileron servos, which
have four entries in the Control column:
•
•
•
•
Applying crow brake (spoiler) control lifts both ailerons.
Applying up-elevator droops both the ailerons (snap-flap mixing).
Applying flaps also droops the ailerons
Applying aileron control moves the aileron servos (!).
Note the entry for “Elevator(Gx)” in the last column for the flap servos 5 and 6: Gx is used to
suppress Snap Flap when flaps are in the thermal position. See below for details of Gx setup.
Programming Screens for F3F Example
The following programming screens are used in setting up F3F:
Table 15 - programming screens used in F3F set-up
Program
Screen
Notes
Assign Control
As in Table 13
Assign Servo
As in Table 14
Servo Travel
Set servo travel and mixing
Servo Centre
Set servo neutrals
Servo Limit
Limit movement of V-tail servos when both Rudder and Elevator are applied together.
Limit movement of Up-going aileron when both Spoiler (crow) and Aileron are applied.
Control Setup
See below for control attributes.
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Table 15 (cont.)
Combi Switch
CAR mode = ON or controlled by secondary switch.
One possible variation would be to control CAR via Gx, so that CAR is disabled when flaps are in
thermal position12.
Soft Switch
The Gx “virtual” secondary switch is slaved off the flap widget “G”. When flaps are in thermal
position, Gx is OFF, otherwise Gx is ON.
In the Servo Travel screen, Gx is used to control ElevatoràFlap mixing.
Control Attribute Settings for F3F Example
Table 16 – Control attributes for F3F set-up
Control
Task
Attribute
VALUE
Aileron
Set differential.
DIFFER
50
Spoiler
See “Disabling Spoiler via a Switch” (page 21)
FIX.VAL.1
0
NORMPOS
á
More About User Mixers
Let’s now take a closer look at user mixers.
As we have seen, built-in mixers like ELEV.MIX, BUTTERFL etc. are fine for many
applications. However flyers of scale and aerobatic models often have more complex
requirements which can only be satisfied with custom mixers, i.e. mixers with a specific set of
inputs for the particular application. In the following section, we’ll see how to design and set
up user mixers.
To understand this section, you will need to have read What are Mixers? (page 7), if not
please refer back to it first.
Setting up a User Mixer
There are three user mixers designated USR-MIXn where n is 1, 2 or 3. A user mixer can
have up to four control inputs. Any of the standard controls like Aileron and Flap can be used,
as well as the Fix Val virtual control. You can even assign the same control to more than one
input.
To create or modify a user mixer, you use the UserMix screen. This is where you specify
inputs and trim mode.
12
This would allow more precise thermalling during the F3F climbout phase, while providing coupling for snappier
entry into turns during the racing legs.
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Note that the mixer is simply a list of control inputs, we say nothing about servos in the
UserMix screen - mixers are associated with servos in the Assign Servo screen. Another
point important worth mentioning here: when a user mixer is created or modified, its definition
13
is available to all model memories not just the one it was set up in. For more details of the
UserMix screen, see Appendix H - Program Screen.
Activating a User Mixer
You activate a mixer by assigning a servo to it. When you assign a servo, the system looks at
the mixer definition, and sets up “pages” in the Servo Travel screen, one page for each mixer
input. This occurs at the moment you press the M key in the Assign Servo screen.
Recycling
There are only three user mixers, so does that mean you are restricted to three possible
mixing schemes for all your servos? Fortunately not, the reason follows from the previous
section.
Say you create a user mixer with Elevator and Rudder inputs, assign servo 1 to it, then add
Spoiler to the list of inputs. Remember that servo 1 will not “see” a page for the new Spoiler
input until you re-assign the servo to the user mixer.
What if instead of reassigning the first servo, you assign servo 2 to the mixer? This leaves
servo 1 with the original (before the changes) mixer inputs, and servo 2 with the new
combination of inputs including Spoiler. Using this technique one mixer can provide a different
mixing scheme for two, three or even all your servos. I call this technique “re-cycling”.
Just to recap,
1. After you create or alter a user mixer, you must assign a servo to it to make it effective.
To reinforce the point, the system takes you straight to the Assign Servo screen when
you hit the M key in the UserMix screen.
2. You can “recycle” a user mixer by changing the inputs and assigning it to a different
servo.
13
It’s even available in supposedly “—EMPTY--” model memories. You can demonstrate this as follows:
1.
2.
3.
4.
Make a copy of one of your model memories, using the File Copy screen, and call it say TEST.
Go to the UserMix screen and define a user mixer say USR-MIX1 with say Elevator and Aileron inputs.
Delete the TEST model memory (using the FileCopy screen). Note that the model name is automatically
changed to “Empty”.
Go into the UserMix screen, and take a look at USR-MIX1. It still has the same Elevator and Aileron inputs,
i.e. it is still there, even though we deleted the model memory!
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So a user mixer can be used in two ways.
•
As a “permanent” mixer. If you have a combination of inputs which you would like to use
for several models, then reserve a user mixer for this purpose. User mixers are available
across all model memories, so you can use it exactly as you would a predefined mixer.
•
As a “recycleable” mixer. If you have lots of complex models with more than three mixing
schemes in total, then re-cycle one or more user mixers as described above.
Example 1 – “Knife Edge Plus” mixer
14
Our first example is a sophisticated mixer for an aerobatic model . The requirements are:
•
•
•
Knife-edge facility: rudderèelevator and rudderèaileron mixing controlled via S5.
Engine side/down thrust compensation: Throttleèelevator and throttleèrudder are
permanently mixed to simulate engine thrust line adjustment.
Loop tracking: Elevatorèaileron mixing is also permanently enabled.
Lets build the servo assignment table. We will keep an open mind at this stage as to whether
we really need a user mixer to do the job.
Considering the requirements above, we do our trick of waggling our imaginary sticks and
seeing which servos respond, and end up with the following table:
Table 17 - Servo Assignment Table with Controls
Servo
Controls
Aileron
Aileron
Elevator
Rudder
Elevator
Throttle
Elevator
Rudder
Rudder
Throttle
Rudder
Throttle
Throttle
Servo assigned to
Servo travel pages
Looking at column 2, we see that mixers must be used for all controls except Throttle. We will
ignore the Throttle for the rest of the discussion as it does not involve a mixer.
Next look at Appendix G - Predefined Mixers to confirm there are no suitable pre-defined
mixers.
The next step is a new one, specific to user mixers: we need to decide on the trim mode for
each input. If you want to include the trim lever in the mixer input signal, then the trim mode
must be set to ON. Normally you would only want to set the trim mode to On for the primary
input for a particular servo e.g. the Elevator input for the elevator servo. Note that if you need
the trim mode to be on for some servos and off for others, you will need two separate inputs
e.g. Elevator and Elevator+T.
14
With thanks to Harry Curzon
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Table 18 - Servo Assignment Table with Trim Mode
Servo
Controls
Aileron
Aileron+T
Elevator
Rudder
Elevator
Throttle
Elevator+T
Rudder
Rudder
Throttle
Rudder+T
Servo assigned to
Servo travel pages
Now gather up the controls in column 2.
•
•
•
•
•
•
•
Aileron
Aileron+T
Elevator
Elevator+T
Rudder
Rudder+T
Throttle.
These will be our mixer inputs. Since there are more than four, we will have to split them up
between two or more user mixers since a single user mixer can only have a maximum of four
inputs. The obvious solution is to have one user mixer per servo.
Table 19 - Servo Assignment Table with Three User Mixers
Servo
Controls
Servo assigned to
Servo travel
pages
Aileron
Aileron+T
Elevator
Rudder
User-Mix 1, inputs:
Aileron+T
Elevator
Rudder
Aileron ON
Elevator ON
Rudder S5
Elevator
Throttle
Elevator+T
Rudder
User-Mix 2, inputs:
Throttle
Elevator+T
Rudder
Throttle ON
Elevator ON
Rudder S5
Rudder
Throttle
Rudder+T
User-Mix 3, inputs:
Throttle
Rudder+T
Throttle ON
Rudder ON
You’ll see that we are using all three user defined mixers, one for each servo. However, there
is an alternative: we could use a single mixer and recycle it by performing the following
sequence.
1.
2.
3.
4.
5.
6.
Create USR-MIX1 with Aileron+T, Elevator and Rudder inputs.
Assign Aileron servo to USR-MIX1
Edit USR-MIX1 so it has Throttle, Elevator+T and Rudder inputs.
Assign Elevator servo to USR-MIX1.
Edit USR-MIX1 so it has Throttle, and Rudder+T inputs.
Assign Rudder servo to USR-MIX1.
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Table 20 – Servo Assignment Table Using Recycled USR-MIX-1
Servo
Controls
Servo assigned to
Servo travel
pages
Aileron
Aileron+T
Elevator
Rudder
User-Mix 1, inputs:
Aileron+T
Elevator
Rudder
Aileron ON
Elevator ON
Rudder S5
Elevator
Throttle
Elevator+T
Rudder
User-Mix 1, inputs:
Throttle
Elevator+T
Rudder
Throttle ON
Elevator ON
Rudder S5
Rudder
Throttle
Rudder+T
User-Mix 1, inputs:
Throttle
Rudder+T
Throttle ON
Rudder ON
We have now effected all the mixing using just one user mixer definition. This is fine for a
one-off setup but not very convenient if we have several models using the same mixing
scheme - we’d have to go through the whole process of editing USR-MIX1 before assigning
each servo.
This inconvenience can be overcome if we are prepared to compromise a little. As you saw
earlier, Aileron and Aileron+T are two different inputs as far as a user mixer is concerned.
What if we made all the controls “+T”? We would then have just four inputs: Aileron+T,
Throttle+T, Elevator+T and Rudder+T. Since the maximum number of inputs for a user mixer
is four, we could then use a single mixer for all servos without recycling as follows:
Table 21 - Servo Assignment Table with “+T” on All Controls
Servo
Controls
Servo assigned to
Servo travel
pages
Aileron
Aileron+T
Elevator+T
Rudder+T
User-Mix 1, inputs:
Aileron+T
Elevator+T
Rudder+T
Throttle+T
Aileron ON
Elevator ON
Rudder S5
Throttle OFF
Elevator
Throttle+T
Elevator+T
Rudder+T
As above
Aileron OFF
Elevator ON
Rudder S5
Throttle ON
Rudder
Throttle+T
Rudder+T
As above
Aileron OFF
Elevator OFF
Rudder ON
Throttle ON
Note that inputs which are Off in the last column will have to disabled explicitly in the Servo
Travel screen.
We have implemented the whole scheme using a single user mixer. Beware though that we
have compromised by enabling the trim mode “+T” for all inputs. This means that trim
movement on all the controls will be included in all the outputs, e.g. moving the elevator trim
will cause a displacement of the aileron. Often as in this example it will be a very small
second order effect - whether this is acceptable depends on the particular application.
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Mimicking Built-in Mixers
You can cook your own version of the BUTTERFL mixer - complete with Aileron Differential
15
Suppression - by setting up a user mixer with Aileron+T, Elevator, Flap+T and Spoiler
inputs. This could be useful if you want to create your own variations on the built-in mixer.
Advanced Techniques
This section puts together some of the features of the system to do some tricks. You may not
need to use these functions in your models, but if you understand how they work you can
devise your own solutions.
Switching Mixer Inputs
A secondary switch can be used to activate either of two mixer inputs. This is a very powerful
technique with a number of applications. The best way to illustrate this is by an example.
Example – Idle Up
On some large power models, it is required to have two different ranges of throttle travel, one
for “flight idle” and the other for “ground idle”, selectable via a switch. Typically the top end is
the same for both settings of the switch, only the low range is different. This is how you can
do it with S1:
1. Go to the USER MIX screen and set up USR-MIX1 with two identical inputs: Input 1 =
Throttle + T, Input 2 = Throttle + T. Note that T must be specified for Throttle’s IDLE TRIM
attribute to work via the trims.
2. Assign the throttle servo to USR-MIX1
3. The Servo Travel screen for the throttle servo will have two pages, both of them for
Throttle (since we have specified Throttle for both inputs to the user mixer). Go to the first
page, and set the mode to S1á
á. With S1 in the up position, adjust the servo end points
for full throttle and ground idle.
4. Go to the second Throttle page. Set the mode to S1↓. With S1 in the down position,
adjust one end point for full throttle as above, and the other end for flight idle.
And that’s it! With S1 up, the first input (ground idle) is selected, the second (in-flight idle) is
disabled. Vice versa with S1 down. Note that the IDLE TRIM attribute functions through the
mixer.
Table 22 – Servo assignment table for Idle Up mixer
Servo
Controls
Servo assigned to
Servo Travel Pages
Throttle
Throttle
User-Mix 1, inputs:
Throttle + T
Throttle + T
Throttle S1 á
Throttle S1 â
15
Aileron Differential Suppression is touted as a “feature” of the BUTTERFL mixer. In fact, ADS is active with any
user mixer which has both aileron and spoiler inputs.
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Using SI to Switch or Disable Mixer Inputs
In the previous example, we saw how to switch between mixer inputs, using a two position
switch. In this example we see how to switch between two inputs, and additionally disable
them both. For this a three position switch is required in conjunction with SI (that’s SI as in
“ess-eye”) – note this use of SI is not documented in the user manual.
Example: +ve and –ve snapflap switch.
16
For advanced aerobatics on a scale power machine, it is required to have a three position
switch controlling ElevatoràFlap mixing as follows:
•
•
•
UP: Elevator to Flap mixing, surfaces move in opposite directions
DOWN: Elevator to Flap mixing, surfaces move in same direction
MIDDLE: Elevator to Flap mixing is disabled.
Here’s how it’s done:
1. Create a user mixer say USR-MIX1, with three inputs: Flap, Elevator and Elevator
(Elevator is specified twice).
2. Assign one or more flap servos to USR-MIX1
3. Go to the Servo Travel screen for one of the flap servos. Set the mix:
•
•
•
Flap input: set the required movement and set the mode to ON.
First Elevator input: set the required ElevatoràFlap mixing and set the mode to SIá.
Second Elevator input: set the required ElevatoràFlap mixing set the mode to SIâ.
4. Repeat 3 and 4 for the other flap servo.
With SI in the Up position, Flap and the first Elevator input are enabled. With SI Down, Flap
and the second Elevator input are enabled. With SI in the middle (OFF), both Elevator inputs
are disabled and the flaps are controlled purely from the Flap input.
Using SI with Flaps
Here’s a way of getting four preset positions for flaps. This could be useful for any
applications, where four different flap settings are required for e.g. launch, duration, cruise
and speed. The method involves a two position switch for the main Flap control, with a three
position switch on SI providing two further preset positions.
SI (3-pos switch)
Flap control
(2-pos switch)
Flap Position
MIDDLE
Up
Determined by Servo Travel 1st end-point
MIDDLE
Down
Determined by Servo Travel Centre
UP
Determined by Flap’s FIX.VAL.1 attribute
DOWN
Determined by Flap’s FIX.VAL.2 attribute
16
Thanks to Harry Curzon for posing the problem and the solution.
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How to Get Full Travel Using a 2-position Switch.
It is not possible to obtain full servo movement from a simple switched function using a
standard 2-position two-wire switch as supplied with the set.
There are two ways of getting round this limitation
Method 1 - using the FIX VAL control, and a user mixer.
1. Go to the User Mixer screen
2. Choose the first mixer “USR1” and assign the FIX VAL control to inputs 1 and 2.
3. Go to the Assign Servo screen and assign servo 1 to USR1.
4. Go to the Servo Travel screen. There should be two FIX VAL pages, which will look
identical so you may not notice that you are stepping from one to the other as you
switch pages. Just choose the first one at this stage.
5. Set the travel to –100% and assign the switch S1 to it so it looks like this: S1â
â
6. Go to the other FIX VAL page.
7. Set the travel to +100% and assign switch S1 so it looks like this: S1á
á
S1 should now move the servo between its end points. Note the servo centre in the Servo
Centre screen should be set to zero.
The way it works is this:
•
•
•
•
The mixer has two inputs, each seeing an independent copy of FIX VAL.
With S1 down, one mixer input sees the FIX VAL of –100, the other input is disabled (0).
Add the inputs and we get -100 at the output.
With S1 up, the first input is disabled, while the other input sees the second FIX
VAL(100). Add them together and you get +100 at the output.
Operating switch S1 therefore alternates the outputs between –100 and +100 i.e. full
travel either side of neutral.
Note that this method doesn’t use up any valuable controls like AUX or FLAP, it works purely
via a single secondary switch.
Method 2 – using a three wire harness
The second method doesn’t involved any special programming. It requires a third wire to be
added to a standard two-position SPDT switch (as supplied for the secondary switches).
Solder the wire between the spare tag on the switch and the spare tag on the port plug.
To test it, plug the harness into port H, assign AUX to the H, assign a servo to AUX. Toggle
the switch, and the servo should now have full travel either side of neutral. Note that you will
not be able to use the modified switch for secondary switch applications after this modification
(although no damage will be done if you try).
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A Binary Servo Controller
This is a solution looking for a problem, but it does illustrate what can be done with a little
thought. The idea is to enable switches S1 to S4 to move a servo to any one of 16 positions
as follows:
•
•
•
All switches off = binary 0000 è servo is at centre
All switches on = binary 1111 = 1510 è servo is at one end point.
Other configurations è servo position is determined by value 0 – 15.
The solution is as follows:
1. Create USR MIX 1 with four inputs, all of them FIX VAL control.
2. Assign Servo 1 to USR MIX 1 in the Assign Servo screen.
3. Go to the Servo Travel + Rev screen and select Servo 1. There will be four "pages",
one for each copy of FIX VAL input. Initially they will all be identical so there will only
appear to be one page! Plough on nevertheless...
4. For page 1, set travel to 48 and assign to S1
5. For page 2, set travel to 24 and assign to S2
6. For page 3, set travel to 12 and assign to S3
7. For page 4, set travel to 6 and assign to S4
DIY Switches
In this section we’ll investigate how to wire up DIY switches for the various ports. We’ll divide
17
the ports into three groups namely E-I (primary switches), S1-S5 (two-state secondary
switches) and SI (three-state secondary switch).
Switches
All switches on the mc3030 are SPDT type. Both 2-way and 3-way switches are used.
Switches may be mechanically biased to one side via an internal spring, but this does not
affect the electrical properties.
Harnesses
Switch harnesses may be 2-wire or 3-wire.
Port Logical States
Ports S1 – S5 have two states 0 and 1.
Ports E-H and SI have three states 0, 1 and 2.
Note the numbers are only used to indicate the possible states, the actual values are not
significant. The state of a port depends on the state of the switch to which it is connected,
which in turn depends on the position of the switch and the number of wires (2 or 3) in the
harness.
17
A thru D as are reserved for the stick units.
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Table 23 – Port States
Switch type
Switch Position
State of S1-S5
State of E-H,
and SI
2-way 2-wire
Up
1
1
Down
0
0
Up
1
1
Down
1
2
Up
1
1
Middle
0
0
Down
0
0
Up
1
1
Middle
0
0
Down
1
2
2-way 3-wire
3-way 2-wire
3-way 3-wire
Port states and system software
The following tables show the effect of the different port states.
Table 24 - Servo assigned to AUX, AUX assigned to 2 position switch on E-H.
Port
State
Servo Position
1
End point 1
2
End point 2
0
Neutral
Table 25 – Logic for S1–5 & L/S
Port State
Software state
Normal
Rev
1
á
â
0
â
á
Table 26 - Logic for port SI
Port State
Software state
Normal
Reverse
1
á
â
2
â
á
0
Neither
Neither
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Making Your Own Plug/Switch Assemblies
My mc3030 was supplied with gold-plated switches by manufactured by C&K. These are
available from the Farnell catalogue.
Table 27 - Farnell part numbers for SPDT sub-miniature switches
Action
Positions
Farnell Part No.
On/On
2
151-165
On/Off/On
3
151-167
On/Mom
2
917-930
For information on making up the plugs which connect to the mainboard, I’m indebted to
Harry Curzon: “The part I used from Maplins to make plugs for switches is a ‘straight
bipolarised locking plug assembly’ at 0.1inch pitch, meant for pc boards. It is a strip of plastic
with pins pushed through, solder the lead on to one end and the other goes into the sockets in
the mc3030 mainboard. For a 3-pin assembly the part is BX96E at 45p. Much better value is
the 12 pin assembly YW14Q at 70p which can be carefully cut into 4 plugs.”
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Appendix A - Mainboard Connections
Ports for Primary Sticks & Switches
PCB Socket
Code
Type of Widget Allowed
Default Factory Connection
KnR18
A,B
2-axis stick with trims
Stick without ratchet
A=ßà
B= áâ
KnL
C,D
2-axis stick with trims
Stick with ratchet
C=ßà
D=áâ
E
E
Slider or 2/3 position switch
Slider
F
F
Slider or 2/3 position switch
Slider
G
G
Slider or 2/3 position switch
3-position switch
H
H
Slider or 2/3 position switch
(no widget supplied)
I
I
Slider or 2/3 position switch
(no widget supplied)
Secondary Switches
PCB Socket
Switch Code
Type of Widget Allowed
Default Factory Connection
S1
S1
2 position switch
2 position
S2
S2
2 position switch
2 position
S3
S3
2 position switch
2 position
S4
S4
2 position switch
(no widget supplied)
S5
S5
2 position switch
2 position
I
SI
2 or 3 position switch
(no widget supplied)
Miscellaneous Ports
PCB Socket
Application
M
3-position switch for switching model memories.
DE
Digi Adjuster
LS
Teacher/pupil (“buddy box”) switch.
MNT
Multinaut module
18
The dual-axis sticks each have identical 5-pin plugs which can apparently be swapped round, however this is not a
good idea. If you need to switch from Mode 1 to Mode 2 (throttle right to throttle left) then the ratchets should be
swapped as described in the manual.
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Appendix B - Controls and Attributes
This table shows all the controls selectable Assign Control screen, and their attributes.
Controls
Attributes
EXPO
DUAL
RATE
Aileron
Y
Y
Elevator
Y
Y
Y
Y
Rudder
Y
Y
Y
Y
Name
Applic.
TRAVEL TRAVEL CENTRE DIFFER
+/-
Y
Y
Throttle
FIX.
VAL. 1
FIX.
VAL. 2
NORM
POS
IDLETRIM
THR.
CURVE.
DIR.
THRO.
Y
Y
SUPPRESS
Y
Y
Y
Thrott 2
Y
Spoiler
Y
Flap
Y
Y
Retract
Y
Y
Towhook
Y
Y
Mixture
Heli
Roll
Heli
Y
Y
Y
Y
Nose á/â
Heli
Y
Y
Y
Y
Yaw
Heli
Y
Y
Y
Y
Pitch
Heli
Y
Y
Y
Gyro
Heli
Y
Y
Ship Rudd
Boat
Motor
E-flite
Y
Motor2
E-flite
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Aux.1
Y
Y
Y
Aux.2
Y
Y
Y
Aux.3
Y
Y
Y
Aux.4
Y
Y
Y
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Appendix C - Screens Navigation
Screen Name
Navigation
Servo Travel
ServoàTrvl+Rev
Servo Centre
ServoàCentre
Servo Limit
ServoàLimit
Servo Test
ServoàTest
Control Setup
ControlàSetup
Control Slow
ControlàSlow
Combi Switch
ControlàCombi-sw.
Test Widgets
ControlàTest
File Copy
FilesàCopy
File Name
FilesàName
File Shift
FilesàShift
Check Trims
FilesàChktrim
Timer
Menu2àTimer
Op Time
Menu2àOP.time
Assign Control
Menu2àAssignàControl
Assign Servo
Menu2àAssignàServo
UserMix
Menu2àAssignàUserMix
Soft Switch
Menu2àAssignàSoftsw.
Pupil
Menu2àMenu3àPupil
Teacher
Menu2àMenu3àTeach
RPM
Menu2àMenu3àRPM
Transmission Mode
Menu2àMenu3àPCM/PPM
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Appendix D - Program Screens by Category
Category
Screen
Navigation
Assigning Controls
Assign Control
Menu2àAssignàControl
Assigning Servos
Assign Servo
Menu2àAssignàServo
Servo Adjustments
Servo Travel
ServoàTrvl+Rev
Servo Centre
ServoàCentre
Servo Limit
ServoàLimit
Control Attributes
Control Setup
ControlàSetup
Mixers
User Mix
Menu2àAssignàUserMix
Combi Switch
ControlàCombi-sw.
File Copy
FilesàCopy
File Name
FilesàName
File Shift
FilesàShift
Timer
Menu2àTimer
Op Time
Menu2àOP.time
Gx
Soft Switch
Menu2àAssignàSoftSwitch
Miscellaneous
Servo Test
ServoàTest
Control Slow
ControlàSlow
Test Widgets
ControlàTest
Check Trims
FilesàChktrim
Pupil
Menu2àMenu3àPupil
Teacher
Menu2àMenu3àTeach
RPM
Menu2àMenu3àRPM
Transmission
Mode
Menu2àMenu3àPCM/PPM
Memory Management
Timers
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Appendix E - Servo Assignment Targets
The items which servos can be assigned to, in the Assign Servos screen.
Item
Type
Item
Type
AILERON
Control
ELEV. MIX
Mixer
ELEVATOR
Control
V. TAIL
Mixer
RUDDER
Control
V.TAIL+
Mixer
THROTTLE
Control
FLAPERON
Mixer
THROTT 2
Control
BUTTERFL
Mixer
SPOILER
Control
SNAPFLAP
Mixer
FLAP
Control
QUADRO
Mixer
RETRACT
Control
DELTA
Mixer
TOWHOOK
Control
TAILROT.
Mixer
MIXTURE
Control
HEIM-MIX
Mixer
ROLL
Control
FLAREMIX
Mixer
NOSE á/â
Control
HEAD-MIX
Mixer
YAW
Control
DYN.THR.
Mixer
PITCH
Control
USR-MIX1
User Mixer
GYRO
Control
USR-MIX2
User Mixer
SHIP RUDD
Control
USR-MIX3
User Mixer
MOTOR
Control
UNUSED
(channel output = centre)
MOTOR2
Control
AUX.1
Control
AUX.2
Control
AUX.3
Control
AUX.4
Control
FIX.VAL
Virtual Control
---------
Undocumented,
sends servo to
one end of
travel.
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Appendix F - Secondary Switch Functions
The table shows which control attributes are controllable via secondary widgets.
Attribute
Can be enabled/disabled by secondary switch?
EXPO
No
DUAL RATE
Yes
TRAVEL
No
TRAVEL +/-
No
CENTRE
No
DIFFER
No
FIX. VAL. 1
Yes
FIX. VAL. 2
Only using SI
NORM POS
No
IDLE-TRIM
No
THR. CURVE.
No
DIR. THRO.
No
SUPP-RESS
No
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Appendix G - Predefined Mixers
Mixer
Control Inputs
Recommended Servo
Assignment
Application
ELEV MIX19
Elevator
Spoiler
Flap
Elevator servo
Conventional tail models with elevator trim
compensation for spoiler/flaps.
V.TAIL
Elevator
Rudder
V-tail servos
Simple V-tail models
V.TAIL +
Elevator
Rudder
Spoiler
Flap
V-tail servos
V-tail models with elevator trim compensation
for spoiler/flaps.
FLAPERON
Aileron
Flap
Wing servos
Combined flaps/ailerons
BUTTERFL20
Aileron
Flap
Spoiler
Elevator
Two or four servos in the wing.
Models with four wing servos and crow
brakes
Models with two wing servos and aileron
brakes
Also provides Snap Flap mixing
(elevatoràflap + elevatoràaileron) and
Use in conjunction with ELEV MIX or
V.TAIL+.
QUADRO
Aileron
Flap
Elevator
Wing Servos
Separate flaps and ailerons, with optional
snap flap mixing (elevatoràflap). Crow
brakes not supported.
DELTA
Aileron
Elevator
Elevon servos
Delta and tailless models.
TAILROT.
HELI
HEIM-MIX
HELI
FLAREMIX
HELI
HEAD-MIX
HELI
DYN.THR.
HELI
19
Wrongly labelled ELEVATOR+ on p. 57 of the manual
20
Wrongly labelled “aileron brake (Crow) mixer” on p. 58 of the manual
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Appendix H - Program Screens
Screen Name
Navigation
Servo Travel
Servoà
àTrvl+Rev
Description
Adjusts the travel and direction of a servo for each mixer input.
Operation
;
+/-
Cycles over servos 1 – 9. The display shows the control or mixer the servo is assigned to. If the servo is
not assigned to a control or mixer UNUSED is displayed.
Ä
+/-
If the servo is assigned to a control pressing +/- has no effect.
If the servo is assigned to a mixer, +/- cycles over mixer inputs.
,
+/-
Adjusts the amount of servo travel. The display shows the following fields:
A number between –110 and +110 representing the amount of travel. The sign indicates the direction
of rotation of the servo.
Code A-I of widget associated with the control.
An arrow indicating which side of neutral this adjustment applies.
To adjust servo travel for the other side of neutral:
1.
Move the widget until the arrow changes direction,
2.
Adjust travel as above.
Note: if “CONTROL?” is displayed in this area, it means that the control has not been assigned to a
stick/switch. This is not necessarily a problem, it just means that the page is disabled.
_
R
Reverses rotation of servo for both sides of stick/switch travel. To reverse direction for one side only,
use the +/- keys as above.
+/-
Cycles through modes: ON, OFF and changeover switch.
R
•
Mode = ON: control or mixer input is active.
•
Mode = OFF: control or mixer input is ignored.
•
Mode = SECONDARY SWITCH: control or mixer input is enabled by a switch.
If mode is OFF or ON, flips between modes. If in “secondary switch” mode, reverses the sense of the
switch.
Notes
The Mode adjustment allows mixing to be switched on, off or controlled by a switch.
The Servo Travel adjustment can also be used to make the MPX compatible with other makes, so that switching
transmitters between makes does not cause significant difference in servo travel. For Futaba/JR/Hitec/Sanwa
compatibility, start off with a base Servo Travel value of around 75% each way. See also Servo Centre.
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Program Screens (cont)
Screen Name
Navigation
Servo Centre
Servoà
àCentre
Description
Adjust the centre position of a single servo. Use this adjustment for fine tuning the position of control surfaces on the
bench, before flight, or to compensate for bent or knocked linkages on the field.
Operation
;
+/-
Cycles through servos 1-9. The display shows the control or mixer the servo is assigned to. If the servo
is not assigned to a control or mixer UNUSED is displayed.
Ä
+/-
Adjust the centre position between 0-110.
Notes
To maintain the full range of servo movement, keep the centre value in the range –10 to +10. Between 10 and 110,
the amount of servo travel on one side decreases linearly to zero (it is not changed on the other).
A centre value of –10 corresponds to a pulse width of 1.5ms, which is the standard for JR/Hitec/Futaba. Setting the
centre to –10 for all servos allows MPX or other transmitters to be used without re-splining the servos.
When Ä is pressed, any mixing and trim values for the servo are temporarily cancelled to move the servo to its true
centre. As a result, the servo may appear to jump on entering and again on leaving the Servo Centre. This is normal
behaviour.
This screen is not suited for trim lever adjustments, for that use adjust the Centre attribute.
Screen Name
Navigation
Servo Limit
Servoà
àLimit
Description
Places an absolute limit on the displacement of a servo.
Operation
;
+/-
Cycles through servos 1-9. The display shows the control or mixer the servo is assigned to. If the servo
is not assigned to a control or mixer UNUSED is displayed.
_
+/-
Sets the limit between 0 – 110. The number represents a displacement from the neutral position.
The limit can be set for each direction of travel independently. Set the limit for one side, then move the
associated stick/switch in the other direction until the arrow changes and set the other side.
Notes
Limit is used most commonly in conjunction with mixers where applying maximum inputs simultaneously might cause
control hinges to bind or other unwanted effects.
Changing the servo centre will necessitate a readjustment of the Limit value.
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Program Screens (cont)
Screen Name
Navigation
Servo Test
Servoà
àTest
Description
Exercises the servos assigned to a control. This screen is useful for checking servo travel without having to handle
the transmitter.
Operation
Ä
+/-
Cycles between controls/mixers
_
R
Sets test mode on or off
Notes
When in test mode, the MPX operating system takes over the selected control - operating the stick/knob manually
has no effect.
If the selected control is an input to a mixer, all the servos assigned to the mixer are exercised.
Screen Name
Navigation
Control Setup
Controlà
àSetup
Description
Adjust control attributes. There is a separate page for each attribute.
Operation
;
+/-
Cycles between sticks/switches A-H. The name of the associated control is displayed alongside. If no
control has been assigned to the stick/switch, “UNUSED” is displayed.
Ä
+/-
Cycles between the attributes of selected control.
Notes
See mc3030 User Manual (pp. 37-43, 64-67).
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Program Screens (cont)
Screen Name
Navigation
SoftSwitch
Menu2à
à Assignà
àServo
Description
Assign a servo to a control
Operation
;
+/-
Cycles through servos 1-9. The display shows the control or mixer the servo is assigned to. If the servo
is not assigned to a control or mixer UNUSED is displayed.
_
+/-
Changes the control or mixer the servo is assigned to.
Notes
A servo cannot be assigned to more than one control or mixer. However… Several servos can be assigned to the
same control or mixer (equivalent to using a Y-lead).
See also
Appendix E - Servo Assignment Targets
Screen Name
Navigation
Control Slow
Controlà
àSlow
Description
Sets the servo speed to between 0.4 and 10 secs in each direction.
Operation
;
+/-
Cycles between controls. Both the widget code A-I and control name are displayed.
_
+/-
Adjust the servo transit time. Can be adjusted for each direction independently.
Notes
Applies to controls assigned to any widget except A and C.
To disable servo slow set the transit time to zero.
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Program Screens (cont)
Screen Name
Navigation
Combi Switch
Controlà
à Combi-sw.
Description
Implements Coupled Ailerons and Rudder (also known as “CAR”)
Operation
Ä
_
Sets mode:
+/-
Cycles between OFF/ON and changeover switches S1 – S5, SI and L/S
R
Toggles between OFF and ON
+/-
Movement of slave relative to master 0 – 200%
R
Toggles master/slave mode AILERONàRUDDER and RUDDERàAILERON
Notes
Cascades its output to other mixers, i.e. you set CAR on top of other mixing such as VTAIL or VTAIL+.
Screen Name
Navigation
Identify Widgets
Controlà
à Test
Description
Reveals the codes for all the widgets (except dual-axis control sticks). Displacing a widget highlights the associated
code. Use this screen to
Determine the codes of each widget.
Check switches and levers have been assembled the right way up.
Operation
,
DigiAdjuster test. After pressing this key, “>” should be displayed if digi-adjuster is rotated clockwise,
and “<” if anticlockwise.
Notes
The display shows secondary switches (S1 – S5 and L/S) in lines 1 and 2, and stick/switches E – I in lines 3 and 4.
Also shown are the Memory switch and Digi Adjuster.
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Program Screens (cont)
Screen Name
Navigation
File Copy
Filesà
àCopy
Description
Copy or erase a model memory
Notes
See mc3030 User Manual (p. 47).
Screen Name
Navigation
File Name
Filesà
àName
Description
Change the name of a model memory
Notes
See mc3030 User Manual (p. 47)
Screen Name
Navigation
File Shift
Filesà
àShift
Description
Change the active model memory
Notes
See mc3030 Users Manual (page 50)
Screen Name
Navigation
Check Trims
Filesà
àChktrim
Description
Check the position of the slider trims
Notes
See mc3030 User Manual (p. 51).
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Program Screens (cont)
Screen Name
Navigation
Timer
Menu2à
àTimer
Description
Set up the stopwatch
Notes
See mc3030 User Manual (pp. 16-18).
Screen Name
Navigation
Op Time
Menu2à
àOP.time
Description
Reset the operating time
Notes
See mc3030 User Manual (p.16).
Screen Name
Navigation
Assign Control
Menu2à
à Assignà
àControl
Description
Assign a control to a stick or switch
Operation
Ä
+/-
Cycle over widgets A-I
_
+/-
Cycle over controls
Notes
Unused controls should be explicitly assigned to “UNUSED”. Otherwise they may be providing unwanted inputs to
mixers.
If you assign more different controls to the same stick/knob only one assignment will actually work. Best avoided!
Rules for Assigning Controls
•
Rule One: You can’t assign the same control to two different widgets A-I.
•
Rule Two: Do not assign different controls to the same stick/knob (you are physically able to do this but the
results are unpredictable).
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Program Screens (cont)
Screen Name
Navigation
UserMix
Menu2à
à Assignà
àUserMix
Description
Define a user mixer.
Operation
;
+/-
Cycle between four mixers USR-MIX1 to USR-MIX3
,
+/-
Cycle between four inputs for the selected mixer
_
+/-
Select the control to use as input.
R
Toggle between Normal and With Trim (identified by +T).
Notes
If With Trim is selected the trim lever contributes to the mixer input signal (and hence all the outputs).
After you press M to finalise the mixer definition, you must assign (or re-assign) your servos to the mixer. When you
assign a servo, the system alters the servo definition so that the correct inputs appear in the Servo Travel pages.
Failure to assign the servo to the mixer means that any changes will not be reflected in the servo travel pages. In
order to remind you of this, the system takes you directly to the Assign Servos screen when you press M to exist the
UserMix screen. If you don’t reassign your servos, the old (unedited) mixer definitions will continue to be used.
Screen Name
Navigation
Soft Switch
Menu2à
à Assignà
àSoftsw.
Description
Define a virtual secondary switch
Operation
Ä
+/-
Choose master widget A-H. The corresponding control is displayed.
_
+/-
Choose the switching threshold
Notes
Gx appear in the secondary switch lists as SA, SB, SC, SD, SE, SF or SG depending on the master stick/switch
chosen.
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Program Screens (cont)
Screen Name
Navigation
Pupil
Menu2à
àMenu3à
àPupil
Description
Master-Pupil connection (a.k.a. “buddy box”).
Notes
See mc3030 User Manual (pp.74).
Screen Name
Navigation
Teacher
Menu2à
àMenu3à
à Teach
Description
Master-Pupil connection (a.k.a. “buddy box”).
Notes
See mc3030 User Manual (pp.75).
Screen Name
Navigation
RPM
Menu2à
àMenu3à
àRPM
Description
Rev counter readout. Requires MPX rev counter sensor.
Notes
See mc3030 User Manual (pp.18)
Screen Name
Navigation
Transmission
Mode
Menu2à
àMenu3à
àPCM/PPM
Description
Select transmission mode.
Notes
If using a Futaba or other third party PPM receiver, select PPM9. See mc3030 User Manual (pp.18) for more info.
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