Futaba GY701 Gyro Manual

INSTRUCTION MANUAL
1M23N23906
TABLE OF CONTENTS
• Precautions ----------------------------------3
• Warranty and Repair Service (in U.S.A.) --8
• Introduction ---------------------------------9
• Features --------------------------------------9
• Contents ----------------------------------- 11
‡6SHFL¿FDWLRQV ----------------------------- 14
• Recommended Servos ------------------- 15
• Replacement and Optional Items ------- 15
• Connecting the GY701 to your Receiver 16
• LED Indicator Description -------------- 19
• Mechanics Preparation------------------- 20
• Opening Screen --------------------------- 22
• Home Screen ------------------------------ 23
• Warning Display -------------------------- 28
• Edit Screen -------------------------------- 30
• Gyro Basic Setting ----------------------- 32
• Gyro Sensor Installation ----------------- 34
• Tail Rotor Servo Installation and Setup-- 35
• Before Flight Checklist ------------------ 38
• Adjustments During the Test Flight ---- 39
• Using Normal Mode --------------------- 41
• Setting the Gain--------------------------- 42
• Governor Basic Setting ------------------ 44
• Mounting the Magnet and Sensor ------ 52
• Fuselage Setting Precautions ----------- 56
• Governor Operation ---------------------- 58
• Governor Speed Setting ----------------- 60
TABLE OF CONTENTS
Gyro
Governor
: Instructions for gyro function
: Instructions for governor function
Technical updates and additional programming
examples can be found at:
www.futabausa.com
PRECAUTIONS
Meaning of Special Markings
Pay special attention to safety where indicated
by the following marks:
DANGER - Procedures which may lead to dangerous conditions and cause death/serious injury
if not carried out properly.
WARNING - Procedures which may lead to a
dangerous condition or cause death or serious
injury to the user if not carried out properly, or
procedures where the probability of superficial
injury or physical damage is high.
CAUTION - Procedures where the possibility
of serious injury to the user is small, but there is
a danger of injury, or physical damage, if not carried out properly.
: Prohibited
: Mandatory
• S.BUS Basic Setting --------------------- 62
• Gyro Expert Setting ---------------------- 65
• Governor Expert Setting----------------- 74
2
3
PRECAUTIONS
PRECAUTIONS
The GY701 requires 5-10 seconds to initialize when the power is turned on. Do not move
the helicopter and do not move the tail rotor
stick during this initialization or the gyro may
not initialize properly. Once the initialization
process is complete, the tail rotor servo will
move to the left extent and then to the right
extent. This will occur twice. The indicator
light will change to solid red for AVCS Mode
or solid blue for Normal Mode.
Verify that the gyro is operating correctly.
Verify that the gyro compensates in the correct
direction before flight. If the compensation direction is incorrect the model will pirouette uncontrollably, at a very high rate.
Verify that the gyro is operating in the desired
mode.
Verify that the gyro mounting pads are in good
condition.
Verify that the gyro wires are not contacting the
frame of the helicopter.
The servo type parameter within the GY701
must match the type of servo you are using. Incorrect setting may damage the GY701 or the
servo, possibly resulting in a loss of control during
flight.
Always ensure that there is some slack in the
gyro cables to help maximize performance. Always use the supplied gyro mounting pads to attach the gyro to the helicopter mechanics. Do not
use a strap that encompasses the GY701 sensor.
This may affect the overall performance of the
gyro.
Always allow the gyro to adjust to the surrounding environmental temperature before flight.
A large temperature change during use will cause
drift and other operational issues.
The GY701 sensor uses a high strength aluminum die cast case. Do not allow anything to touch
the gyro case as it may cause a short circuit.
If you are switching between Normal Mode
and AVCS Mode in flight, please keep in mind
that you must have the gyro re-learn the center
position after making a trim change within the
transmitter. To memorize the new center position
simply flip the gain switch on the transmitter three
times between Normal Mode and AVCS Mode
(Normalt AVCSt Normalt AVCS) within one
second. The tail rotor servo will center indicating
that the new center position has been memorized.
4
5
WARNING
Failure to follow these safety precautions may
result in severe injury to yourself and others.
• Read through the entire manual before operating this product.
BEFORE EACH FLIGHT:
Always check the transmitter and receiver battery voltage to ensure they have enough remaining capacity to complete the flight.
Always exit programming mode before attempting to fly the model.
Only use the GY701 with a 2.4GHz system
such as the Futaba FASST system, or a PCM
system. Use with a FM system is strongly discouraged since interference can cause serious
operational problems.
Gyro operating precautions:
Gyro
PRECAUTIONS
PRECAUTIONS
When operating the gyro in AVCS Mode, all tail
rotor compensation and revolution mixing must be
disabled and any tail rotor offsets for flight modes
must be disabled.
When the GY701 is operated in AVCS mode
the tail rotor servo will not center when the stick
is released. This is normal operation for AVCS
mode. The servo may also move to the extent
while the model is being carried out to the flight
line. Before take off, you must center the tail rotor
servo by moving the tail rotor stick full left, then
full right, back to full left and then allow the stick
to center within one second. You can also visually
center the tail rotor pitch slider by using the tail
rotor stick.
Do not drop the GY701 sensor onto a hard
surface or subject the GY701 sensor to a strong
shock as this may damage the sensor.
Always use the supplied mounting pads or the
Futaba replacement mounting pads available
from your local hobby dealer.
Governor operating precautions:
Governor
Always set battery fail safe function at the
GY701. Since the GY701, when used, controls
the throttle, the battery fail safe function that is in
a receiver will not be used.
Throttle fail safe function (transmitter setting):
Use the fail safe function for the channel that
turns the governor on and off to set the fail safe
position to the point at which the governor is
turned off. With this setting, when the system enters the fail safe state, the governor will be turned
off and the receiver throttle signal (fail safe position preset) will be output directly.
6
When using the condition hold function, transmitter’s function), always set the throttle servo
maximum operating point to less than the point
at which the governor is turned on. Depending on
the conditions, this setting will turn on the governor and prevent the engine from exceeding the
set speed even when condition hold is set.
At the beginning of flight, keep the governor in
the off state by setting the throttle stick to maximum slow side.
When the model is on the ground, lower the
pitch to the position at which the model does not
try to lift off. Do not take your eyes off the model.
When the governor operates and the rotor speed
increases the lift also increases causing the
model to try lift off , depending on the pitch position.
Check the sensor output not only when installing the sensor but periodically. Since the magnet
rotates at high speed, it is subjected to a large
centrifugal force. Check the magnet output and
mounting state after about every 10 flights.
If the model begins to shake during operation,
immediately turn off the governor. The carburetor
design, etc. may cause the engine to operate unstable. If this occurs, lower the maximum speed
setting to the range over which there is no problem.
7
WARRANTY & REPAIR SERVICE (IN U.S.A.)
If any difficulties are encountered while setting
up or operating your GY701, please consult the
LQVWUXFWLRQPDQXDO¿UVW)RUIXUWKHUDVVLVWDQFH\RX
may also refer to your hobby dealer, or contact the
Futaba Service Center at the web site, fax or telephone number listed below:
www.futabausa.com
Phone:1-256-461-9399 FAX:1-256-461-1059
If you are unable to resolve the issue, pack the
system in its original container with a note enclosed and a thorough, accurate description of the
GL൶FXOW\,QFOXGHWKHIROORZLQJLQ\RXUQRWH
• Symptoms (including when the problem occurred)
• System (Transmitter, Receiver, Servos and model
numbers)
• Model (Model name)
• Model numbers and quantity
• Your Name, Address and Telephone number
Send the respective items to the authorized Futaba
Service Center Address below:
FUTABA Corporation of America
2681 Wall Triana Hwy Huntsville, AL 35824,
U.S.A.
8
INTRODUCTION
The Futaba© GY701 is combined heading hold
AVCS gyro and head speed governor in one box.
Its cutting-edge MEMS (Micro Electro Mechanical System) sensor design, ultra high-speed processing speed and advanced PID control algorithm
put it a quantum leap ahead of all other heading
hold gyros in size, weight and performance. The
GY701 has been optimized to work for model helicopter competition.
FEATURES
• Combined Gyro and Governor in one box. Individual either Gyro or Governor working mode
are supported.
• The fastest operation scheme is utilized both the
Gyro and Governor section.
‡/RZSUR¿OHVPDOOVL]HDQGOLJKWHUZHLJKW
• Small size of the combined one box gyro and
governor controller, 44 x 29 x 12mm, 13 g
• Using the 128 x 36 dots graphical white color
OLED (Organic Light Emitting Display), high
brightness and contrast.
• Easy setting divided by Basic and Expert editing
menu. The basic setting is for initial setting and
Expert setting is for precise setting.
• Firmware can be updated from PC through CIU-2.
• Supporting the S.Bus connection. Only one
wire connection to the receiver can operate the
GY701.
9
FEATURES
CONTENTS
• Gyro section
Your GY701 includes the following components:
• Advanced and adaptive PID operation is utilized
‡6PDOODQGORZSUR¿OHJ\URVHQVRUFRORUV/('DUH
installed on the top surface. Using the Aluminum
Alloy metal case. 21 x 21 x 8mm, 14.5 g
• Wide operation dynamic ranges up to +/- 1,200
deg/sec.
• 3 kinds of servo type are supported
• 3D and F3C operation mode is selectable
• The Feed forward operation is utilized. Pitch signal
can be added to the gyro operation. (F/F mixing,
only S.BUS connection)
• New operation algorithm achieves the more consistent pirouette and smooth Yaw control .
• Governor section
•Advanced and adaptive PID operation is utilized
•Fastest operation.
•Wider revolution control ranges, 1000 rpm-3000
rpm
•Both digital and analog servo can be selected
•Revolution compensation by Yaw rate is installed
•Governor or Rev. Limit mode selectable
•New operation algorism achieves more faster and
smooth revolution control .
•Back plate sensor can be selected by the option (for
OS-91, OS-55, OS-50)
Type of set
• Gyro & Governor set w/BLS251
• Gyro & Governor set
• Governor set
• Gyro set
SET CONTENTS
GY701 Control Amp
*Mini Screwdriver
*Dust Covers (x3)
X
X
X
Gyro Sensor
*Mounting Pads (x3)
X --- X
X
Governor Sensor
*Sensor Mounting Hardware
*Magnet (x2)
--- X
X
BLS251 Servo
*Servo horn and mounting parts
--- --- --- X
Extensions (Black/Red)
1
X: supplied
1
---: not supplied
• Other function
• Maximum revolution memorization
• Engine runtime integration
• OLED power saving
‡/('RQR൵VHOHFWDEOH
10
X
11
X
2
2
CONTENTS
CONTENTS
GY701 Control Amp
Sensor Mounting Stay
Dust Cover
Adjustment Screwdriver
SENSOR
& Sx
Tx
Mounting Pads
Gyro Sensor
GV-1
SENS.
THRO
MXTR
r.p.m 1 r.p.m 2 r.p.m 3
m.trim GOV on GOV off
on / off
m.trim
r.p.m
THRO
2mm Thick (three)
BLS251 Servo
Governor Sensor
Extensions:
Extension (Black)
Magnet
12
Extension
E t
i (Red)
(R d
13
SPECIFICATIONS
RECOMMENDED SERVOS
Width (Controller):
(Gyro sensor):
(Speed sensor):
Length (Controller):
(Gyro sensor):
(Speed sensor):
Height (Controller):
(Gyro sensor):
(Speed sensor):
Weight (Controller):
(Gyro sensor):
(Speed sensor):
Maximum* Operating Voltage:
Current Drain:
Selectable Servo Frame:
Center Pulse Width:
Flight Mode:
Control Resolution:
Speed stability accuracy:
Speed Control Range:
Operating Temperature:
Control System:
Sensor:
Angular Velocity Range:
1.14in [29mm]
0.83in [21mm]
0.30in [7.5mm]
1.73in [44mm]
0.83in [21mm]
0.63in [16mm]
0.47in [12mm]
0.31in [8mm]
0.39in [10mm]
0.459oz [13g]
0.353oz [10g]
0.141oz [4g]
3.8V to 8.4V DC
80mA
70Hz, 280Hz and
570Hz(Gyro only) Rate
1520μS (70Hz & 280Hz
Frame Rate)
User selectable F3C
or 3D (Gyro)
0.1Hz (6rpm)
(Engine speed)
1%
1,000-3,000rpm
(Rotor speed)
14°F to 113°F
(-10°C to +45°C)
Digital advanced control
Vibrating structure gyro/
Magnetic sensor
(Gyro/Governor)
±1,200 Degrees Per
Second (Gyro)
.91 Size Helicopters
Futaba S9254 Digital Servo Heli: FUTM0224
(280Hz/1520μS)
Futaba S9256 Digital Hi Speed: FUTM0226
(560Hz/760μS)
Futaba BLS251 Brushless Heli Servo: FUTM0521
(560Hz/760μS)
REPLACEMENT & OPTIONAL ITEMS
Futaba PC Interface CIU-2: FUTM0951
FSH64 GY520 Extension 200 mm (2): FUTM4664
FSH65 GY520 Extension 350 mm (2): FUTM4665
FSH66 GY520 Extension 55 mm (2): FUTM4666
FSH67 GY520 Extension 80 mm (2): FUTM4667
FSH68 GY520 Extension 130 mm (2): FUTM4668
FSH69 GY520 Mounting Pad: FUTM4669
2x22x22 mm (10)
FSH70 GY520 Mounting Pad: FUTM4670
3x22x22 mm (10)
FSH71 GY520 Shield Plate: FUTM4671
1x22x22 mm (3)
* The maximum operating voltage listed only applies to
the GY701. Always verify that your receiver, servos,
tail rotor servo, switch and any other electronic components used in your installation are capable of operating at the voltage you plan to use.
14
15
CONNECTING THE GY701 TO YOUR RECEIVER
CONNECTING THE GY701 TO YOUR RECEIVER
(1) Gyro: Gyro
• Connect the gyro sensor.
*Insert the sensor connector until it
is firmly locked.
OLED Display
• Displays the set data and
operation status.
(2) Rsen: Governor
• Connect the speed sensor.
(1)
(2)
(3) Rin/SB:
• S.BUS receiver: Connect to the S.BUS output of the receiver.
• Other than S.BUS receiver: Connect to the
rudder channel output. Gyro
(3)-(6)
(7)
Edit Keys
• Used when setting data.
• Operated by pushing with the
accessory mini screwdriver.
• Connect the GY701 and the
receiver with the supplied extensions. [(3) to (6)]
When using an S.BUS receiver, (4) to (6) are not connected.
• GY701 power requirement:
4.8V (from receiver)
16
Receiver
(8)
(4) Tin: Governor
• Connect to the throttle channel output.
(5) Gain: Gyro
• Connect to the gyro gain channel output.
(6) rpm: Governor
• Connect to the governor speed channel
output.
(7) Tout: Governor
• Connect the throttle servo.
(8) Rout: Gyro
• Connect the rudder servo.
17
CONNECTING THE GY701 TO YOUR RECEIVER
Connect the supplied extensions to the GY701
connecter. Route the wires through the helicopter
mechanics and connect them to the appropriate
receiver channels. To determine the appropriate
receiver channels please check your transmitter’s
instruction manual. Using wire mounts, wiring
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loop material, route the extensions to the receiver.
Ensure that the extensions leading to the receiver
cannot become entangled in rotating components
and make sure the extensions are not rubbing
DJDLQVWPHWDORUFDUERQ¿EHUZKLFKPD\GDPDJH
the wires.
Once the power system is installed into your helicopter please move onto the later section to learn
how to program the gyro.
18
LED INDICATOR DESCRIPTION
Slow Flash: 1/2 Second or longer
Fast Flash: 1/4 Second or shorter
LED Indicator
CONDITION LED INDICATOR DESCRIPTION
Initialization Red Double Flash No Receiver Pulse or Sensor
Error
Slow Blue Flash
Warm-Up
Fast Blue Flash
Sensor Initialization
Slow Red Flash
Governor Warning
P r o g r a m - Blue Single Flash Parameter Programming
ming
Mode
Slow Blue Flash
Rudder Limit Setting Mode
Operating Solid Blue
Normal Mode, Ready for
Flight
Solid Red
AVCS Mode, Ready for
Flight
Slow Violet Flash Offset from the Neutral Position (AVCS)
Fast Blue or Red Gyro is Rotating
Flash
19
MECHANICS PREPARATIONS
WARNING
Newer high end servos and other radio
equipment are capable of placing large demands on the power systems in use today.
When using a regulator you must ensure that
the regulator is capable of delivering the current demands of the equipment you have selected. In addition to this make sure the wiring
and switch you have selected are capable of
handling high current draws.
Even though the GY701 is a high performance
gyro and governor it will be necessary to ensure
that the helicopter mechanics are also in optimum
operating condition. Please use the guidelines
below and address all issues before installing and
test flying the GY701.
MECHANICS PREPARATIONS
• Vibration will affect the GY701’s overall performance. All rotating components on the helicopter should be balanced to minimize vibrations in
flight. Ensure that your motor is running smooth
and all vibrations have been addressed before
installing and test flying the GY701.
• The GY701 must be used with a rigid tail rotor
drive system. Any modern torque tube or belt
drive system should be adequate. Do not attempt to fly the GY701 using a wire driven tail
rotor system.
• Always ensure the drive gears, torque tube,
pulleys, belt, bearings and shafts are in proper
working condition. If any of these items are
damaged or worn they must be replaced.
• The linkage rod, tail rotor bell crank, pitch slider
and tail rotor grips must operate without friction
to obtain the best performance from the GY701.
If any binding is present it must be fixed before
the helicopter can be flown. Binding in the tail rotor control linkage will decrease the performance
of the GY701 gyro and this may also shorten the
servo lifespan. Please take the time now to ensure
the tail rotor system on your helicopter is working
correctly, without friction or binding. Gyro
20
21
OPENING SCREEN
HOME SCREEN
The GY701 starts the initializing process when
powered up. After it is finished initializing, the
GY701 starts initializing and moves to the home
screen.
Boot up display
The OLED shows the screen below. The upper
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DQGWKHOLQHEHORZLQGLFDWHVWKH¿UPZDUHYHUVLRQ
Initializing display
The helicopter images are displayed during initializing. After completing the initialization, the
UXGGHUVHUYRPRYHV&:!&&:DVLW¿QLVKHVDQG
moves to home screen. The helicopter must not be
moved during the initializing process.
$IWHU¿QLVKLQJWKHLQLWLDOL]DWLRQVHTXHQFH2/('
changes the display to Home screen. There are 3
kinds of the Home screen related by the operation
mode. The home screen shows the information
follows.
Initial Home screen
•Gyro+Governor mode
2. Stop boosting
3. Gyro working mode
1. Neutral compensation
4. Gyro gain
5. on/off switch
8. Orientation indicator
6. Yaw rate comp.
7. Battery voltage
•Gyro only mode
•Governor only mode
9. Setting
revolution
1. Neutral compensation Gyro
It indicates the function of the neutral compensation
when the pirouette stop is active. No display shows
when inhibited.
2. Stop boosting Gyro
It indicates the function of the gain boosting when
pirouette stop is active. “G” character is displayed
when inhibited.
22
23
HOME SCREEN
HOME SCREEN
3. Gyro working mode Gyro
This indicates the gyro working mode is either AVCS
or Normal mode. The inverse “A“ character is disSOD\HGZKHQWKHUXGGHUQHXWUDOLVR൵VHW
At the AVCS
mode
At the normal
mode
Neutral offset at
AVCS mode
At the AVCS mode, move the rudder stick more than
2 times left and right full within the period of 1 second and return the stick to neutral position, the rudder
servo memorized the neutral position. The OLED
shows the "--------" display at this condition.
Reset AVCS
Hold the rudder stick to neutral and move the gyro
JDLQ FKDQQHO 1RUPDOĺ$9&6ĺ1RUPDOĺ$9&6 LQ
the 1 second period. After doing so, the rudder stick
neutral is memorized by the GY701 to match the
rudder stick neutral. This operation is useful for rudder neutral re_trimming from normal mode to AVCS
mode. After finished the operation, OLED shows
"********". The GY701 always renews the rudder
neutral position during power up with AVCS mode.
The rudder stick must be left in the neutral position
during starting up.
5. on/off switch Governor
This shows the switch condition of the governor. The
governor is active when ”On” displayed.
6. Yaw rate comp. Governor
This indicates the revolution compensation when the
pirouette is active. No display shows when the function is inhibited.
7. Battery voltage
This indicates the battery voltage. The Low battery is
displayed at below 3.8 volts.
8. Orientation indicator
This acts as the operation guide. Pushing the key
switch below this indicator changes the editing mode.
9. Setting revolution display Governor
This displays the setting revolution of the governor. It
shows only in the governor operation mode.
Revolution display
Governor
Reset rudder neutral
4. Gyro gain Gyro
It indicates the gyro working gain.
24
The battery voltage display automatically changes
to the engine revolution display once the engine
is running, and returns to battery voltage display
25
HOME SCREEN
HOME SCREEN
when the engine stop. The revolution mode can
be selected either during main rotor revolution or
engine revolution. The rpm character starts blinking slowly when the governor starts operating
and blinking fast when the revolution reaches +/2% of the setting revolution. The rpm character
changes to inverse character as the revolution
increases to within +/- 1% of the setting when the
revolution is locked.
For the governor only mode, the revolution is displayed on the top of the display line during engine
run.
the data + or – key for more than one second.
2. Engine runtime
Governor
This displays the engine runtime integration. The display is changed to runtime mode by pushing mode +
key 2 times from home screen. The display unit will
show seconds until 100 hours is reached xxHxxMxx,
over 100 hours, minutes as xxxxHxxM. The display
is reset by pushing data + or – key for more than 1
second.
3. OLED display mode [default: Saver]
Sub_Home screen
At the home screen display, the display below
WKH OLQH LV VFUROOHG WR %DWWHU\ YROWDJHĺ0D[
UHYROXWLRQĺ(QJLQH UXQWLPHĺ2/(' GLVSOD\
PRGHĺ/(' GLVSOD\ PRGHĺ2SHUDWLRQ PRGH E\
pushing the mode + or - key.
This selects the OLED display mode. The Saver mode
reduces the brightness and saves the power consumption after no editing has been done for 60 seconds.
The brightness is returned by pushing any key. The
Light mode always lights to the maximum brightness.
4. LED display mode [default: ON]
1. Max. revolution
Governor
This memorizes the maximum engine revolution during operation. The display is changed to Max. revolution by pushing the mode + key. The revolution data
is stored in the memory. The data is reset by pushing
26
It selects the display mode of the LED on the gyro
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by Off setting for power saving. The mode can be
changed by pushing the data + or – key.
27
HOME SCREEN
WARNING DISPLAY
5. Operation mode [default: Gyro+Gov]
This sets the operation mode of the GY701. Set to
“Governor” when the gyro sensor is not used and set
“Gyro” when the governor sensor is not used. Set
“Gyro+Gov” when the both gyro and governor sensor
are installed. Mode is changed by pushing the data +
or – key. The home screen is changed after changing
the operation mode. The “SensorER” is displayed
when the gyro sensor is not installed and the operation mode is set “Gyro” or “Gyro+Gov” mode. Push
any key to escape this display and set the operation
mode to “Governor”.
When the operation mode is changed, you will need
to reboot the GY701. During the operation, you can
not change the mode.
Input error
Gyro
This indicates no rudder or throttle signal input.
The GY701 does not work in this condition.
Sensor error
Gyro
The gyro sensor is not working. The gyro does not
work in this condition.
Low battery
The warning symbol is displayed when the governor is on during power up. The governor is never
activated at this time. The governor will work
once the condition is turned off. The governor
PXVWEHR൵ZKLOHVWDUWLQJWKHHQJLQH
It displays as the battery voltage becomes less
than 3.8 v. If low battery is recognized for more
than 1 second, the governor goes info low battery
condition and the governor operation is stopped.
If the B/FS function is activated, the throttle servo
is moved to setting position by B/FS function. The
B/FS condition is reset for 30 seconds by moving
the throttle stick to low full. Throttle servo can be
controlled by stick. After 30 seconds have passed,
you can go into B/FS condition again. This seTXHQFHODVWVLQGH¿QLWHO\7KHKHOLFRSWHUVKRXOGEH
landed immediately if B/FS is active.
28
29
WARNING Display
Governor warning display
Governor
EDIT SCREEN
EDIT SCREEN
The edit mode is changed to Gyro basic, Governor basic, or S.Bus basic mode by pushing the
data+ or- key. These modes set the basic operation
IRULQLWLDOÀLJKW%\SXVKLQJWKHPRGHRU±NH\
for more than 1 second at the gyro or governor
screen, the editing mode is changed to the expert
mode, more precise setting can be done in this
mode. Pushing the mode+ or – key for 1 second
again, the editing menu will return to basic menu.
The setting of the governor functions are skipped
in the gyro only mode and the gyro function are
skipped in the governor only mode as well.
Pushing the mode+ or – key at basic or expert
mode, the edit menu will scroll and the parameters
can be set in each menu.
At the home screen, the display is changed to
0D[ UHYROXWLRQĺ(QJLQH UXQWLPHĺ2/(' GLVSOD\PRGHĺ/('GLVSOD\PRGHĺ2SHUDWLRQPRGH
by pushing the data+ or - key.
The diagram below shows the edit sequence. The
instruction describes the Gyro+Governor mode
after.
Push DATA
+/– key
Push MODE
+/– key
Max. revolution
Home
screen
Engine runtime
OLED display mode
LED display mode
Operation mode
Gyro Basic
Gyro Expert
Governor Basic
Governor Expert
S.Bus Basic
Push MODE +/– key
for 1 second
30
31
GYRO BASIC SETTING
This sets the gyro’s fundamental functions. The
menu (4) Servo limit point setting should be set
¿UVW
Push MODE
+/– key
(1) Start display
GYRO BASIC SETTING
WARNING
Verify that the gyro compensates in the correct direction before flight. If the compensation
direction is incorrect the model will pirouette
uncontrollably, at a very high rate.
The editing menus are
scrolled by pushing the mode
+ or – key.
(4) Limit setting [default: 100%, setting
range: 50 〜 150%]
(2) Servo type [default: DG:1520]
Selection of the servo type to be used. The
servo type is changed to Digital 1520, Digital
760 or Analog by pushing data+ or – key.
DG 760: BLS251, S9256, S9251
DG 1520: BLS254, BLS257, S9254, S9257
WARNING
This parameter must match the type of servo
you are using. Incorrect setting may damage
the GY701 or the servo, possibly resulting in a
loss of control during flight.
Adjusting the maximum servo throw. Set the
amount to limit the rudder throw.
Move the rudder stick right (left) maximum. At
this point, increase or decrease the movement
by pushing the data+ or – key.
WARNING
When using the GY701 for the first time, or
when making changes in the throw of a servo,
always perform the limit setting operation.
(5) Flight mode [default: F3C]
(3) Gyro direction [default: Normal]
Setting the gyro operation direction. Set the direction as the gyro operates the servo to right direction when the helicopter moves to left. The direction is changed by pushing the data+ or – key.
32
Selection of the flight style. F3C mode is more
precise rudder control, the 3D mode is more
active rudder control, pirouette speed is faster
than F3C mode. The mode is changed by pushing the data+ or – key.
Pirouette rate at AFR100% to full stick:
F3C = 450 deg/sec
3D = 720 deg/sec
33
GYRO SENSOR INSTALLATION
The gyro sensor should be mounted on a rigid
platform, at least 6in [152mm] away from a Nitro Engine. It is not necessary to mount the gyro
near the main shaft of the helicopter but it is very
important that the mounting area chosen is rigid.
Please refer to your helicopter manufacturer’s instructions for recommended mounting locations.
Installing the gyro sensor
The GY701 is supplied with three 2mm Mounting
Pads. When mounting the gyro in a larger electric
or .50 through .91 size nitro helicopter we recommend using a supplied 2mm Mounting Pad.
Gyro Sensor
2mm Mounting Pads
Gyro Mount
TROUBLESHOOTING
If you experience erratic gyro operation (drifting,
not holding well or inconsistent pirouette rate),
please follow the troubleshooting tips listed below.
1. Always verify that your model’s tail rotor control
and drive system are working correctly.
2. Electromagnetic interference could affect the
gyro or tail rotor servo. Mount the gyro in a different location, away from the electronic speed
control, servos and drive motor.
3. The trouble may be caused by vibration. Verify
that your helicopter’s components are balanced. If problems persist, try mounting the
gyro in a different location.
34
TAIL ROTOR SERVO INSTALLATION AND SETUP
Following your transmitter instructions, program your transmitter as follows:
Enable the gyro function within the transmitter.
Set the gyro mode to AVCS (GY) within the
transmitter.
Set the remote gyro gain to 70% AVCS in the
transmitter for the Normal and Hold flight
conditions and use 40% AVCS for all idle up
conditions. See “Setting The Gain” section
later in this manual for more details.
Set the Tail Rotor ATV/EPA to 100% for both
left and right.
Set D/R to 75% for both left and right. This
will reduce the maximum pirouette rate.
Make adjustments to these values once the
LQLWLDOWHVWÀLJKWKDVEHHQFRPSOHWHG
It is recommended that you run 30% softening expo on the tail rotor channel.
WARNING
Do not connect the tail rotor servo to the gyro
until the servo type has been selected. Operating
the servo using the incorrect setting may damage
the GY701 or the servo.
Once these steps are completed, turn the receiver
power on and allow the gyro to initialize. Follow
the instructions within the “Gyro Basic Setting”
section of the manual and select the Servo Type
that matches the servo you have chosen to use.
Power down the receiver for now.
35
TAIL ROTOR SERVO INSTALLATION AND SETUP
Install the tail rotor servo into the mechanics
and connect the servo to the gyro. Remove
the servo arm screw from the servo. Turn the
receiver power on and allow the gyro to initialize. Enter the “Gyro Basic Setting” mode
and go to parameter (4) “Servo Limit Point
Setting”. While in the servo limits parameter
the servo will remain centered.
90°
Place an appropriate servo arm onto the servo
and ensure that it is perpendicular to the tail
rotor pushrod as shown. Remove the unused
sides of the servo arm.
Install the control ball supplied with your helicopter onto the servo arm. For larger electric
models or nitro powered models we recommend placing the ball 13.5mm from center.
Once the control ball has been installed place
the arm back onto the servo ensuring that it is
perpendicular to the tail rotor pushrod. Install
the servo arm screw.
13.5mm
TAIL ROTOR SERVO INSTALLATION AND SETUP
Follow the instructions within the “Servo
Limit Point Setting” section and set the servo
limits for the tail rotor servo. Hold the tail
rotor linkage over the linkage ball to avoid
damaging the servo. Once the limits are set
you can place the linkage onto the linkage
ball. When using AVCS mode the optimum
setup is to have 0° of pitch with the tail rotor
servo centered and use all of the available
pitch range in the tail without binding.
7XUQWKHUHFHLYHUSRZHUR൵WRH[LWSURJUDPming mode and then turn the receiver power
back on. Once the gyro has completed initialization move the tail rotor stick to the right
on the transmitter and verify that right (clockwise rotation) tail rotor pitch is inputted to
the tail rotor blades. If left tail rotor pitch is
inputted to the tail rotor blades, then it will
be necessary to reverse the tail rotor channel
in the transmitter.
Pick the helicopter up by the main shaft
and rotate the mechanics counter-clockwise
(from the top). The gyro should compensate
by adding clockwise rotation pitch to the tail
rotor blades. If the gyro compensates by adding counter-clockwise rotation pitch to the
tail rotor blades then it will be necessary to
reverse the “Gyro Direction” setting within
the gyro (refer to the “Gyro Basic Setting”
section earlier in this manual).
,I\RXDUHJRLQJWRÀ\$9&6+HDGLQJ+ROGPRGH
exclusively, then the gyro setup is now complete.
36
37
BEFORE FLIGHT CHECKLIST
Transmitter and Receiver batteries are fully
charged.
The gyro mounting pads are in good condition.
The gyro wiring has some slack in it and all
wires are clear of the main frame.
Power on the transmitter and receiver. Allow
the gyro to initialize.
The GY701 servo type parameter matches
the servo you are using.
The Tail rotor servo arm is perpendicular to
the pushrod and the pitch slider is centered.
The servo does not bind when full left or full
right tail rotor is applied.
The gyro is operating in the correct mode
(AVCS or Normal).
The tail rotor stick operates the tail rotor the
correct direction.
The gyro compensates the correct direction
when the helicopter is rotated.
The gain is set correctly and the gyro operates in the correct mode (AVCS or Normal)
LQHYHU\ÀLJKWFRQGLWLRQ
38
ADJUSTMENTS DURING THE TEST FLIGHT
WARNING
Always make small (1%) adjustments to the tail
rotor D/R or EPA once the value exceeds 100%.
Over 100%, it is possible to exceed the sensor’s
Angular Velocity Sensing Range (+/- 1,200° per
second). The gyro will then no longer control the
pirouette rate or consistency. The pirouette rate
will be extremely fast.
If you experiment with the ultra-fast pirouette rate,
make sure that your flight battery and fuel tank
are secure. Also be certain that your model’s tail
rotor drive train is up to the task.
The Tail Rotor AFR or D/R function within the
transmitter is used to adjust the pirouette rate of
the helicopter. For example at 100% D/R, with the
gyro set to F3C mode, the helicopter will achieve
a 450 deg/sec pirouette rate. If you would like the
model to pirouette faster, then increase the AFR
or D/R. If you would like the model to pirouette
slower, then decrease the AFR or D/R.
The gain should be raised until the tail begins to
oscillate quickly (also called Tail Wag). Once this
point has been achieved, reduce the gain by a couSOHRISHUFHQWDQGWHVWÀ\WKHPRGHODJDLQ&KHFN
and set the gain for each flight mode. Typically
the gain will be lower for the Idle up 1 and Idle up
ÀLJKWPRGHVGXHWRWKHKLJKHUKHDGVSHHGEHLQJ
used. The gain for the Hold condition can also
EHPXFKKLJKHUWKDQRWKHUÀLJKWPRGHVVLQFHWKH
head speed is lower and the engine vibration is
minimized.
39
ADJUSTMENTS DURING THE TEST FLIGHT
USING NORMAL MODE
The tail rotor ratio, tail rotor pitch range and tail
blade length play a large part in achieving optimum tail rotor performance. The gain value can
vary drastically from model to model and the exact value should not play a part in the evaluation
of the gyro’s performance. How the gyro operates
GXULQJÀLJKWLVWKHRQO\FRQFHUQRIRXUV
Most pilots today are using AVCS Mode. If
you are just starting out, it is recommended that
you use AVCS Mode exclusively from the start.
Normal Mode is rarely used today due to the performance benefits of AVCS mode. When using
AVCS mode all trimming of the tail is automatically handled by the gyro. If you should decide to
use Normal Mode than all trimming and mixing
must be setup by you.
If you will be using the Normal Mode (also referred to as Rate Mode) then a few changes to the
setup will be necessary. The tail rotor should be
set to 10 degrees of tail rotor pitch (to counteract
torque) when the tail rotor servo is centered. With
clockwise rotating main rotor blades this means
10 degrees of right tail rotor pitch will be necessary to counteract torque. In addition to this it will
be necessary to use the tail rotor compensation or
revolution mixing functions of your transmitter to
help counteract torque. Please see your transmitter
instruction manual for more information on how
to set this up.
If you decide to switch between Normal Mode
and AVCS Mode in flight, you must have the
gyro re-learn the center position after making a trim change within the transmitter. To
memorize the new center position simply flip
the gain switch on the transmitter three times
b e t w e e n N o r m a l M o d e a n d AV C S M o d e
(NormaltAVCStNormaltAVCS) within one
second. The tail rotor servo will center, indicating
that the new center position has been memorized.
40
41
SETTING THE GAIN
SETTING THE GAIN
Most modern computer transmitters will have a
gyro function built into them. If this is the case,
please refer to your transmitter’s instruction
manual. Most modern gyro functions will allow
you to set the mode of operation and the gains for
several flight conditions. The use of these functions is strongly encouraged. Shown below is a
recommendation of settings:
Recommended Gyro
Function Settings:
Switch: Condition
Type: GY or AVCS
Gain Values
Normal: 70% A (AVCS)
Idleup 1: 40% A (AVCS)
Idleup 2: 40% A (AVCS)
Hold: 70% A (AVCS)
If your transmitter does not have a Gyro function built in then it will be necessary to use the
ATV or EPA function to control the gain. The
Gyro Gain channel will generally be assigned to
a switch which provides two gain values. Simply
set the ATV or EPA for the gyro channel to the
desired gain value and set the Gain Switch to the
desired mode of operation. Unfortunately since
you will only have one gain value available it will
be necessary to use the lowest value needed (for
example Idleup 2). When using this method of
controlling the gain, one direction of the switch
will be AVCS mode and the other direction of the
switch will be Normal mode. Always ensure the
J\URVZLWFKLVVHWWRWKHGHVLUHGPRGHEHIRUHÀ\ing. Do not accidentally change the gyro switch in
ÀLJKW
2-Position
Switch
A
Gyro Mode
B
NORMAL
Gain Channel
ATV or EPA
70%
AVCS
70%
Normal Side
AVCS Side
GAIN %
100%
50%
0%
+100%
42
Neutral
0%
-100%
43
GOVERNOR BASIC SETTING
This sets the governor’s fundamental functions.
The menu (9) Servo limit point setting must be
VHW¿UVW
GOVERNOR BASIC SETTING
(3) Gear ratio [default: 8.00, range: 3 〜 30]
Input the main rotor gear ratio by pushing the
data + or-key.
Notes:
Push MODE
+/– key
(1) Start display
The editing menus are scrolled
by pushing the mode + or – key.
• If the gear ratio is not properly set, the set
speed and actual engine speed will be different.
• The gear ratio should be given in the helicopter instruction manual. If the helicopter instruction manual does not give the gear ratio,
calculate the gear ratio as follows:
Engine
pinion gear
N2
Rotor
main gear
N1
(2) Revolution setting [range: 1000 〜 3000
rpm]
Setting the main rotor revolution. This is calculated by engine revolution with the gear ratio of
the main shaft.
• Using by 3position switch
Make sure the display is changed to 1, 2, 3 by moving the switch. Set the desire RPM at each position
by pushing the data + or – key.
• Direct set by transmitter on Gov. mixing
Use default governor mixing as in the T14MZ and
T12FG functions, calibration of the 3 point first,
then direct RPM setting can be set after that.
44
Gear ratio = N1/N2
• Carry values less than 1/1000 to the next
whole number.
45
GOVERNOR BASIC SETTING
GOVERNOR BASIC SETTING
(Governor operating point)
(4) Servo selection >GHIDXOW$QDORJ@
Select the throttle servo type. Digital servos offer the best response. The type is changed by
pushing data + or – key.
Set speed
Set point or more and
60% of set speed
WARNING
This parameter must match the type of servo
you are using. Incorrect setting may damage
the GY701 or the servo, possibly resulting in a
loss of control during flight.
• Throttle stick set to least the set point from slow
side and is engine running at 60% or more of
set speed´´´ON
• Throttle stick held at the set point or
more´´´Remains ON
• Throttle stick lowered past the set point or less
than the slow side´´´OFF
100%
(5) Stick switch [default: 30%]
The governor can be activated by throttle
stick position. Move the throttle stick to the
on position and push SET key, the on point is
memorized. When you push the RSET key, the
function is inhibited. When the governor on/off
switch is inhibited, the stick switch is automatically turned on.
set point or less
(OFF region)
0%
(OFF at slow side)
:KHQJRYHUQRULVWXUQHGRQDQGRৼE\WUDQVmitter throttle stick
The data is set so that the governor can be
WXUQHG RQ DQG R൵ ZLWK WKH WUDQVPLWWHU WKURWWOH
stick. The following describes this operation.
46
47
GOVERNOR BASIC SETTING
GOVERNOR BASIC SETTING
Invalid display
(at PWM)
*RYHUQRURQRৼVZLWFK [default: Inhibit]
It selects the governor activate switch if additional switch is used. Pushing the SET (Data+)
key activates the function. The on/off direction
is changed by pushing the SET key again. The
function is inhibited by pushing the RSET (Data-)
key. This function is only available at S.Bus connection. “Invalid” is displayed at PWM connection.
(7) Battery failsafe setting [default: Inhibit]
The governor goes into the failsafe mode
when the battery voltage is below 3.8 v. When
activated, the governor is deactivated and the
throttle servo is moved to B/FS position. Move
the throttle stick to idle position, the B/FS condition is deactivated for 30 seconds, and returned
to B/FS after 30 seconds has passed.
Move the throttle stick to B/FS position as desired, push set key to confirm the setting. Pushing RSET will inhibit the function.
When governor turned on and off by switch
(S.BUS connection only)
Setting the switch to the ON position turns on
the governor. The following describes this operation.
(8) Yaw rate compensation [default: CW/
TOP]
Governor can be turned
on and off by a switch.
• Switch set to on position and engine running at
60% or more of set speed´´´ON
• Throttle stick set to maximum slow
position´´´Remains ON
• Switch set to off position´´´OFF
48
This works the revolution compensation during pirouette. Set the mode to match the gyro
installing direction, either CW/TOP, CW/BOTM,
CCW/TOP, CCW/BOTM by pushing the Set key.
Pushing the RSET key inhibits the function.
At the governor only mode, this function is inhibited.
CW: clockwise
CCW: counter clockwise
TOP: normal side
BOTM: reverse side
49
GOVERNOR BASIC SETTING
GOVERNOR BASIC SETTING
(11) Revolution sensor testing
(9) Servo limit point setting
It sets the throttle servo maximum throw. It is
fundamental for governor operation. It must be
set prior to other function setting. It must be set
when the throttle linkage is changed or trim is
changed as well.
For this setting, idling position is set first, then
high position guided by the display, push the
data + or – key to memorize. “*Finish*” is displayed when the setting is completed, “*Error*”
is displayed when the setting position is out of
range (too narrow from high to idle below 50 %
through).
It tests the output level of the revolution sensor.
Turn the engine by hand, and check the output
level. The display indicates the current level on
left side numbers, maximum level on right side
numbers. The output level needs to be more
than 60 % for correct operation.
When using the GY701 for the first time, or
when making changes in the throw of a servo,
always perform the limit setting operation.
(10) Limit point testing
It tests the limit point if they are correct. Push
data + or – key, throttle servo moves to setting
point followed to the display.
50
51
MOUNTING THE MAGNET AND SENSOR
Modify the cooling fan and install the accessory
magnet and attach the magnetic sensor to the engine at the position shown below.
Cooling fan
Magnet (Embedded in cooling fan.)
Sensor (Attached to engine flange
through a stay.)
When installing the sensor magQHWWRWKHPX൷HUVLGHDOVRUHIHU
to the needle side mounting.
MOUNTING THE MAGNET AND SENSOR
&RROLQJIDQPRGL¿FDWLRQ
Drill a hole in the fan at the magnet mounting position. Make the hole about 4.1mm in
diameter and 1.5 to 1.7mm deep.
Embed the magnet in this hole in the direction in which an output is obtained. Use
epoxy adhesive that cures in 30 minutes or
longer. Do not use epoxies that contain metal
such as JB Weld.
Cement the magnet to the cooling
fan so that the magnet is level
with this side of the cooling fan.
Magnet
Magnet operating side check
Bring the magnet near the end of the sensor
and check the operating side.
Sensor
Magnet
This is the side at which the displayed value
increases in the “Revolution sensor testing”
menu within the “Governor Basic Setting”
section earlier in this manual. Install the magnet with this side facing the sensor. Mark this
side of the magnet with a felt tip pen.
52
If the cooling fan is unbalanced and vibrates,
etc., balance it by mounting the spare magnet
to the opposite side of the cooling fan in the
opposite polarity (so that it does not output a
signal).
Sensor mounting
The sensor mounting method depends on the helicopter and engine.
Mount the sensor to the sensor stay. (Temporary assembly)
Drill a hole in the fan cover at the part corresponding to the sensor so that the distance
53
MOUNTING THE MAGNET AND SENSOR
between the sensor and magnet
can be made 1 to 2mm.
Tighten the sensor stay together
ZLWKWKHHQJLQHPRXQWLQJÀDQJH
(Temporary assembly)
Select the mounting method so
that the sensor does not touch
the frame, or other parts of the
helicopter. Temporarily mount
the sensor and select the magnet
mounting position.
Install the sensor to the sensor
stay using the accessory screws and washers.
Tighten the sensor stay together with the engine using the engine mount screw.
MOUNTING THE MAGNET AND SENSOR
7KHFHQWHURIWKHVHQVRULVGL൵HUHQWIURPWKH
center of the sensor case so be careful when
mounting the sensor.
If the display is less than 60% when the
magnet is directly below the sensor, bring the
sensor closer to the magnet so that the 60%
or more is displayed. The magnet and sensor
gap criteria is approximately 1 to 2mm. If a
sensor output is not obtained even when the
sensor is brought close to the magnet, the
magnet and sensor center positions may have
changed.
Complete assembly of the sensor by securely
tightening the screws that were temporarily
tightened.
Recheck the sensor output.
Sensor adjustment
Adjust the sensor position to obtain a sensor output of at least 60% in the “Revolution
sensor testing” menu within the “Governor
Basic Setting” section earlier in this manual.
Sensor
Magnet
1-2mm
Center of sensor
is offset.
Sensor
case
2.2
mm
3.7mm 3.7mm
54
55
FUSELAGE SETTING PRECAUTIONS
Throttle servo linkage precautions
7R H൵HFWLYHO\ XVH WKH JRYHUQRU REVHUYH WKH IROlowing precautions when connecting the servo
linkage.
Make the servo operating range as wide as
possible. Make the throw of the transmitter
EPA (ATV) function and AFR function as
close as possible to 100%. The governor will
not operate at throws lower than 50%.
Fly with the governor turned OFF and adjust
the needle so that the engine smoothly reacts
to movement of the transmitter stick.
If there is a point at which the reaction of the
HQJLQH LV FRQVLGHUDEO\ GL൵HUHQW GXH WR D WRR
rich or too lean mixture, the governor may
not operate to its maximum potential.
FUSELAGE SETTING PRECAUTIONS
GL൵HUHQW IURP WKDW ZLWK D QRUPDO PX൷HU$GMXVW
the needle (and pipe length) so that engine speed
changes are proportional to the throttle opening.
If the engine speed does not change linearly, the
governor will not perform satisfactorily with a
PX൷HURUDSLSHWKDWGRHVQRWDOORZWKHFDUEXUHtion to be linear.
Fuselage vibration countermeasures
If the helicopter frame is weak, or the engine
mount is deformed or not installed properly, the
vibrations applied to the engine will increase.
Engine vibrations will lead to unstable speed
and prevent the governor from maximum performance. Therefore, make sure that the engine is
vibration free and that the carburetor is of good
liner design because the governor cannot correct
engine problems.
Use of a tuned silencer
The use of a tuned pipe type silencer may cause
the engine throttle response to be substantially
56
57
GOVERNOR OPERATION
Governor operation
The GY701 operates from 1000 to 3000rpm main
rotor speed. However, the engine must be running
DW WKH VHW VSHHG7KH *< WXUQV R൵ WKH JRYHUnor when the engine is starting or idling.
* Governor operation: Operation that stabilizes the engine speed at the set speed.
GOVERNOR OPERATION
has changed.
Deviation from set speed:
The GY701 stabilizes the engine speed to within +1%
of the set speed. For example, if the rotor R.P.M. is
set to 1500rpm, the Rotor R.P.M. speed will deviate
about ±15rpm. However, this poses no problem from
the standpoint of practical use.
Condition of the governor to be on
For safety purposes, the governor is turned on
ZKHQWKHFRQGLWLRQVEHORZDUHVDWLV¿HG
The on/off switch conditions are set to off
during power on.
The stick switch is in on position when it is
used.
7KHRQR൵VZLWFKLVLQRQSRVLWLRQZKHQLWLV
used.
6HWWLQJVSHHGLVQRW2൵
The engine speed exceeds to 60 % of the setting speed.
The speed sensor is working properly.
The following operations do not indicate trouble:
When engine speed rises above the set speed:
A near-vertical dive may cause the engine speed to
rise above the set speed.
Throttle operation speed and ON/OFF point:
If throttle operation exceeds 60% of the set speed and
the rotor speed rises to the set value, the ON/OFF
point may seem to differ with the operating speed.
Delay operation to smoothen the switching operation
causes this and does not mean that the ON/OFF point
58
59
GOVERNOR SPEED SETTING
Direct set by transmitter on Gov. mixing
When governor mixing as in the T14MZ and
T12FG is used to switch the RPM of the rotor
head speed. The head speed can be switched
with each condition or the switch.
*For a description of the governor mixing, refer to
your transmitter’s manual.
Using by 3position switch
Set the RPM at each switch position in the “(2)
Revolution setting” menu within the “Governor Basic Setting” section earlier in this
manual.
governor to 1750)
• The maximum speed can be verified at the MAX.
speed display, however this could show some unlocked main rotor condition which is not accurate.
Reference
The transmitter EPA function can also be used to
change the point 1 and point 3 speed settings to a
certain extent. The amount of this change is proSRUWLRQDOWRWKHGL൵HUHQFHEHWZHHQWKHSRLQWDQG
point 3 set speed and the point 2 set speed. For
example, if point 1 is set to 1300rpm and point
2 is set to 1500rpm, and the transmitter EPA is
changed from 20 to 100%, the point 1 speed will
change from 1460 to 1300rpm. The transmitter
(3$IXQFWLRQKDVYHU\OLWWOHH൵HFWRQWKHSRLQW
speed setting.
Speed
The GY701 is used by connecting the “rpm” input
to the governor speed setting channel of your system. When using an independent governor on/off
switch, activate the “(6) Governor on/off switch”
funtion within the “Governor Basic Setting” section
earlier in this manual. (S.BUS connection only)
GOVERNOR SPEED SETTING
Point 3
Point 2
Speed setting precautions
• When the speed setting channel travel (EPA, ATV,
AFR) is set to 20% or less, points 1 and 3 cannot
be set.
• The engine maximum speed range limits the
maximum speed setting.
• Test fly the helicopter with the governor turned
off and tach the main rotor R.P.M. while in horizonal flight. This is the maximum R.P.M. that can
be achieved with the engine and pitch setup that
you are using. Please set the governor maximum
speed to approximately 50 R.P.M.’s less than max
R.P.M. (Example: If 1800 R.P.M.’s is max then set
60
Point 1
Speed setting
channel travel
Neutral
The speed changes linearly on a line connecting
points 1, 2, and 3.
61
S.BUS BASIC SETTING
This sets the function of the channel of the S.Bus
connection. It is required with the use of the S.Bus
compatible receiver. The wiring from receiver to
servos is made simple by using the S.Bus connection, only one main S.Bus wire is connected to
receiver and GY701 can complete the operation.
In addition, governor on/off switch function, F/
F mixing can be available through the S.Bus connection. At the PWM connection, this function
is invalid. When not using an S.Bus channel, set
“INH” for the channel setting. The S.Bus channels
have linear 16ch, digital 2ch, 18ch total, but the
controllable channels are limited by the transmitter channels.
S.BUS BASIC SETTING
(2) S.Bus setting: Rudder channel [default:
4ch]
Push data + or – key to match the transmitter
rudder channel.
(3) S.Bus setting: Gyro gain [default: 5ch]
Push data + or – key to match the transmitter
gyro gain channel.
Push MODE
+/– key
(4) S.Bus setting: Throttle channel [default:
3ch]
Push data + or – key to match the transmitter
throttle channel.
(1) S.Bus connection setting: start display
Mode is changed by pushing mode + or – key.
Setting ranges common: 1 〜 16ch, DG1, DG2
(5) S.Bus setting: RPM channel [default:
7ch]
Push data + or – key to match the transmitter
RPM setting channel.
62
63
S.BUS BASIC SETTING
GYRO EXPERT SETTING
6%XV VHWWLQJ *29 RQRII FKDQQHO >GHfault: 8ch]
Push data + or – key to match the transmitter
governor on/off channel.
(7) S.Bus setting: Pitch channel [default:
INH]
Push data + or – key to match the transmitter
pitch channel.
This sets the detail of the gyro function for the expert modeler. Push the mode + or – key for more
than one second on the Gyro Basic menu, to go
into the Gyro Expert menu. Push mode + or – key
for more than one second again on the Gyro Expert menu to be returned to the Gyro Basic menu.
(1) Start display
Push mode + or – key, the editing menu will
scroll. Pushing mode + or – key for more than one
second to go, back to the gyro basic menu.
(2) Rudder servo neutral setting
default: 0 uS
ranges: -140 〜 +140 uS
This sets the neutral position of the rudder servo.
Pushing data+ or – key, the neutral position of the
rudder servo is moved.
(8) S.Bus data reset
This resets the S.Bus connection channel to
default. The “Exec.??” is displayed by pushing
data + or – key for confirmation. Push data+ or
– key again, the reset process is done and displayed “-Exec.—“ and return to the start display.
If you push mode+ or – key during confirmation
display, the reset process is aborted.
(3) Gyro basic gain
default: 100 %
ranges: 50 〜 120 %
This sets the gyro fundamental gain. By pushing
the data+ or – key, the value is changed.
Invalid display
(at PWM)
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GYRO EXPERT SETTING
(4) Rudder exponential
default: -60% (F3C-AVCS), -40% (F3C-Normal), -20% (3DAVCS), -20% (3D-Normal)
ranges: -100% 〜 +100%
This sets the feeling of the rudder control. Decreasing the rate to minus, the rudder control is
softer, and is quicker when the value is increased
to plus side. Pushing the data+ or – key, the value
is changed.
GYRO EXPERT SETTING
(7) Control delay Out
default: F3C=10, 3D=12
ranges: 0 〜 20
This sets the rudder control delay of moving to
neutral from right or left side. It can adjusts left
and right individually. Adding to the value, the
control feeling will be mild. Pushing data+ or –
key, the value is changed.
(8) Stop delay
(5) Rudder delay mode
default: 120%
ranges: 100% 〜 400%
default: Function
This selects the rudder delay mode either Function or Constant. The Function mode will have the
rudder control feel softer. The Constant mode has
the linear and quick motion of the rudder. Select
by pilot preference.
This sets the rudder delay of the tail stop motion. It improves the tail stop bounce to adjust
the value. Pushing the data+ or – key, the value is
changed.
(9) Gyro working mode
(6) Control delay In
default: CMT
default: F3C=12, 3D=15
ranges: 0 〜 20
This sets the rudder control delay of moving to
right or left from neutral side. It adjusts left and
right individually. Adding to the value, the control
feeling will be mild. Pushing data+ or – key, the
value is changed.
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This selects the gyro working mode either CMT,
Normal or AVCS. The CMT mode can select the
AVCS or Normal mode through gyro gain channel. The Normal mode is always Normal mode,
AVCS is always AVCS mode. Pushing the data+
or – key, the mode is changed.
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GYRO EXPERT SETTING
GYRO EXPERT SETTING
Decreasing this value may stop tail hunting if it is
taking place at hovering to idle up. Pushing data+
or – key, the value is changed.
(10) Pirouette speed
default: 450 deg/sec (F3C), 720 deg/sec (3D)
ranges: 100 〜 999 deg/sec
This adjusts the pirouette speed of the rudder.
The default values are set 450 deg/sec on F3C
mode and 720 deg/sec on 3D mode when rudder
is 100 %. The bottom of the line shows the actual
pirouette speed of the rudder. When this value
exceeds 1200 deg/sec, the gyro is out of control,
the pirouette speed is very quick and this can be a
dangerous situation. Pushing the data+ or – key,
the value is changed.
(11) Gain change up delay
(13) Rudder histeresis
default: 6 uS
ranges: 0 〜 50 uS
This adjusts the rudder stick null ranges. Pushing
data+ or – key, the value is changed.
(14) Gain tracking
default: 0 %
ranges: -20% 〜 +20%
This adjusts the gyro holding feeling during left
and right pirouette. Pushing data+ or – key, the
value is changed.
default: 12
ranges: 1 〜 50
This sets the delay of the gyro gain from low to
high, the value represents from idle up to hovering. Increasing this value may stop tail hunting
if it is taking place. Pushing data+ or – key, the
value is changed.
(15) F/F mixing (S.Bus connection only)
default: off
This sets the delay of the gyro gain from high to
low, the value represents from hovering to idle up.
This selects the F/F (Feed Forward) mixing active. It helps the gyro operation by adding pitch
to rudder mixing prior of the gyro operation and
improves the gyro performance.
GY701 installs the pitch-> rudder mixing internally. The swash signals are mixed in the swash
mode. The correct F/F mixing is achieved by
individual pitch signal is input in the GY701.
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(12) Gain change down delay
default: 3
ranges: 1 〜 50
GYRO EXPERT SETTING
Separate the pitch signal in the transmitter, and input this signal to the GY701. To do that, make the
programmable mixing as pitch-> AUX, and input
AUX signal to the GY701.
This function is only available by the S.Bus connection. Invalid is displayed in PWM connection.
Pushing data+ or – key, the mode is changed.
(16) F/F mixing rate
default: 0 %
range: -100% 〜 +100%
It adjusts the F/F mixing rate. It can adjust low or
high pitch rate individually from zero pitch point.
Pushing data+ or – key, the value is changed.
(17) F/F mixing acceleration gain
GYRO EXPERT SETTING
This setting must be done when F/F mixing is
used.
(19) Pitch low setting
default: 1940 uS
This sets the minimum pitch point of GY701.
Move the pitch stick to minimum pitch, push
data+ or – key. The minimum pitch signal is
memorized in the GY701. The display shows ！
mark at the setting point. This setting must be
done when F/F mixing is used.
(20) Pitch high setting
default: 1100 uS
It sets the F/F mixing acceleration gain. Pushing
data+ or – key, the value is changed.
This sets the maximum pitch point of GY701.
Move the pitch stick to maximum pitch, push
data+ or – key. The maximum pitch signal is
memorized in the GY701. The display shows ！
mark at the setting point. This setting must be
done when F/F mixing is used.
(18) Pitch zero setting
(21) Sensor mode
default: 0 %
range: 0 〜 200 %
default: 1520 uS
default: Middle
It sets the pitch zero point of GY701. Move the
pitch stick to the zero pitch, push data+ or – key.
The zero pitch signal is memorized in the GY701.
The display shows ！ mark at the setting point.
It selects the response of the gyro sensor signal.
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but the stability is vice versa. Select the good
match for the individual heli. Pushing data+ or –
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GYRO EXPERT SETTING
key, the mode is changed.
GYRO EXPERT SETTING
(25) Gyro data reset
(22) Neutral compensation
default: ON (F3C), Off (3D)
This function works to recall the neutral point of
the rudder servo for improving tail stop motion.
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for about one second, and memorize the neutral
point. If using a 3D helicopter, the tail movement
is often very quick, this function may not work as
well. Check the function to see if it works correctly. Pushing data+ or – key, the mode is changed
It resets the gyro parameter to the default setting.
The “Exec.??” is displayed by pushing data + or –
NH\ IRU FRQ¿UPDWLRQ 3XVK GDWD RU ± NH\ DJDLQ
the reset process is done and displayed “-Exec.—“
and return to the start display. Pushing mode+ or –
NH\GXULQJFRQ¿UPDWLRQGLVSOD\WKHUHVHWSURFHVV
is aborted.
(23) Yaw smoother
default: ON (F3C), Off (3D)
Selects the rudder control feeling. When On, rudGHU FRQWURO EHFRPHV PRUH H[DFW:KHQ 2൵ UXGder control response increases. Select the rudder
control feeling to your taste.
(24) Stop boosting
default: Off
range: Off 〜 200%
This function works for boosting the gyro gain to
improve tail stop motion. Pushing the data+ or –
key, the value is changed.
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73
GOVERNOR EXPERT SETTING
This sets the details of the governor function for
the expert modeler. Push the mode + or – key
for more than one second on the Governor Basic
menu display, to get into the Governor Expert
menu. Push mode + or – key for more than one
second again on the Governor Expert menu to be
returned to the Governor Basic menu.
(1) Start display
GOVERNOR EXPERT SETTING
(3) Revolution display mode
default: Rotor
This selects the revolution display mode for either
the main rotor or engine revolution. Pushing data+
or – key, the mode is changed.
(4) Operation response
Push mode + or – key, to scroll through the editing menu. Pushing mode + or – key for more than
one second, brings you back to governor basic
menu.
(2) Governor working mode
default: Middle
This selects the governor operation response.
Select the best match for your engine type. Pushing data+ or – key, the mode is changed. Recommended selection are, Middle-> glow engine,
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motor-.
(5) Governor gain
default: Governor
This selects the governor working mode as either
governor or revolution limit mode. The Governor
mode works as the engine revolution is at a constant revolution. The revolution limit (Rev. Lmt)
mode only works when the engine revolution exceeds the setting revolution and engine revolution
is to be lower. Pushing data+ or – key the mode
is changed. When the Rev.Lmt mode is selected,
the menu (6) Throttle data mode should be set to
Tx.Curve mode.
This sets the governor working gain. When the
operation response is changed, the governor gain
is automatically changed as default. The best gain
is the amount right before the revolution wagging
takes place. Pushing data+ or – key, the value is
changed.
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default: Moderate=30%,Middle=40%,Quick=60%
ranges: 10~100%
GOVERNOR EXPERT SETTING
GOVERNOR EXPERT SETTING
This sets the delay of the revolution from high to
low. Pushing data+ or – key, the value is changed.
(6) Throttle data mode
(9) Start delay
default: Optimize
This selects the throttle input operation. Pushing
data+ or – key, the mode is changed
Optimize:
GY701 sets the throttle input signal to optimum.
No need to consider the throttle curve setting on the
transmitter.
Fixed:
7KH¿[HGWKURWWOHLQSXWLVXWLOL]HGUHODWHGWRWKHUHYRlution. It is recommended for electric motors.
Tx.Curve:
GY701 uses the exact throttle input from the transmitter. The throttle curve setting on the transmitter
is required. When the Rev.Lmt mode is selected, this
mode should be selected.
(7) Revolution change up delay
default: 5
range: 2 〜 20
This sets the delay during the starting of the
governor. Pushing data+ or – key, the value is
changed.
(10) Low limit at hovering
default: 25 %
range: 0 〜 80 %
This sets the throttle low limit during hovering
revolution to avoid too lean a carburetor. Pushing
data+ or – key, the value is changed.
(11) Low limit at idle up
default: 8
range: 2 〜 20
This sets the delay of the revolution from low
to high. Pushing data+ or – key, the value is
changed.
(8) Revolution down delay
default: 45 %
ranges: 10 〜 80 %
This sets the throttle low limit during idle up
revolution to avoid too lean a carburetor. Pushing
data+ or – key, the value is changed.
(12) Governor data reset
default: 10
range: 2 〜 20
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GOVERNOR EXPERT SETTING
This resets the governor parameter to default setting. The “Exec.??” is displayed by pushing data
RU±NH\IRUFRQ¿UPDWLRQ3XVKGDWDRU±NH\
again, the reset process is done and displayed
“-Exec.—“ and return to the start display. Pushing
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reset process is aborted.
FUTABA CORPORATION oak kandakajicho 8F 3-4
Kandakajicho, Chiyoda-ku, Tokyo 101-0045, Japan
TEL: +81-3-4316-4820, FAX: +81-3-4316-4823
©FUTABA CORPORATION
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2010, 07 (1)
1M23N23906
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