2 LT Beginner_GB.indd

2 LT Beginner_GB.indd
R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
ROBO LT Beginner Lab
p. 26
Control
p. 28
Power Supply
p. 29
ROBO Pro Light
p. 29
Installation ROBO Pro Light and USB Driver
p. 29
Starting the ROBO Pro Light Program
p. 30
Merry-go-round – Entry Level Programing
p. 31
Pedestrian Light
p. 39
Lighthouse with Blinking Light
p. 40
Refrigerator
p. 41
Washing Machine
p. 42
Sliding Door
p. 44
Staircase Lighting
p. 45
Windshield Wiper
p. 46
If something doesn't work right ...
p. 48
25
Contents
R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
"Hi, first I'd like to introduce myself.
I am your fischertechnik trainer and will
accompany you through the entire book.
I will often give you valuable tips and
information.”
ROBO LT
Beginner Lab
Components
"First, I would like to introduce you to the most important components, which are
contained in the ROBO LT Beginner Lab, and give you some technical information about these."
Building blocks
The various building blocks are used to build the individual models. The picture shows a small selection
of these.
Electrotechnical
components
They look similar to the normal building blocks and can also be put together with these. They work with
electrical power. Depending on the function, you call them actuators or sensors.
Actuators
They are called actuators because they are active, they do something. Components such as a motor or an
indicator light perform certain work as soon as they are supplied with electrical power. The motor rotates
and the indicator light is illuminated.
Bulb
Circuit symbol
The light bulb is an artificial light source. In it, an electrical conductor is heated by electrical power and
this causes it to glow.
The construction set contains two different lights, the bulb lamp and the lens tip lamp. In the bulb lamp,
the light, which is emitted, is dispersed. The light from the lens tip lamp is focused to the front by a lens.
This light is used, for example, for light barriers.
Bulb lamp
26
Lens tip lamp
R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
XS Motor
The direct current motor converts electrical energy into mechanical energy. This
results in the rotational movement of the motor.
M
Circuit symbol
A motor also has a gearbox. You can reduce the speed of the motor with this
gearbox.
Sensors
Sensors, such as push-button switches or phototransistors, are components, with which actuators can be
controlled. For example, a motor can be turned on or turned off with a push-button switch.
3
Push-button switches
Push-button switches are in the category of touch sensors. If you push the red
button, then a contact is mechanically moved in the casing and electric current
flows between the connections 1 and 3. At the same time, the contact between
the connections 1 and 2 is interrupted.
1
2
Circuit symbol
So, you can use the push-button switch in two different ways:
As a "closer:"
Contacts 1 and 3 are connected. Push-button switch is pressed: electricity flows.
3
Push-button switch is not pressed: no electricity flows.
1
2
The push-button switch shown here is pressed.
As a "break contact:"
Contacts 1 and 2 are connected. Push-button switch is pressed: no electricity flows.
Push-button switch is not pressed: electricity flows.
3
1
2
The push-button switch shown here is pressed.
In the construction set, ROBO LT Beginner Lab, the push-button switch is
always connected to the contacts 1 and 3.
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R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
Phototransistor
A phototransistor is an electronic switch, which reacts to light. Of course, you have asked
yourself how the entrance door in the department store opens automatically without
you having to push a push-button switch or use a switch.
Circuit symbol
A light barrier is used to do this and this barrier consists of a light source (transmitter) and a sensor (receiver).
In the construction set, a lens tip lamp is used as the transmitter and a phototransistor as the receiver.
"So, now you have become familiar
with the individual components. Perhaps
you learned about these in school so that
these are nothing new for you."
Control
ROBO LT Controller
■ The ROBO LT Controller is the heart of this computing construction set. It is not visible for you, but the
Controller building block has a number of electronic components. The interplay of these components with
your computer and a control program allows you to control the models in the ROBO LT Beginner Lab.
Here, some more technical information:
The Controller has three inputs (I1-I3) for connection of sensors, two outputs (M1-M2) for the
connection of actuators, a DC jack socket for the connection of a power supply unit
(9V), two connecting sockets for a 9V battery tray or rechargeable battery pack, a
mini-USB connection for data transmission from the PC to the Controller and a LED
as an equipment-on indicator light.
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R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
■ For the power supply for the ROBO LT Controller, you will use the 9V block battery tray, which is contained in the construction set. Insert a battery as described in the assembly instructions and connect the
battery tray with the ROBO LT Controller.
red = +
Note! The switch on the battery tray can be
shoved in two directions. But, you can only turn
on the ROBO LT Controller in one direction. Just
try it out to find out, which switch position causes
the green indicator light (LED) on the Controller
to light up.
Power Supply
green
en = –
■ ROBO Pro Light is the computer software, which together with the ROBO LT Controller you use to control
your models. This is found on the CD ROM, which is included in the construction set. First, you must install
this software on your PC.
■ The installation of the software, ROBO Pro Light, and the USB driver for the ROBO LT Controller is
described in separate installation instructions for this, which are contained in the construction set. The
PC needs the USB driver to be able to exchange data with the ROBO LT Controller.
Caution!
You need administrator rights on the PC for the installation of USB drivers. The best thing to do for this
step is to let an experienced PC user help you.
29
ROBO Pro Light
Installation
ROBO Pro Light
and USB driver
R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
"I am certain that you can do this without
my help. Is exactly the same as when you open a
game or want to work with the Internet. But here is a
short explanation in spite of this."
Starting the
ROBO Pro Light
program
You find the program, ROBO Pro Light, in the Windows start window at:
d
f
c
e
These
ese symbol
symbols may look somewhat different depending on th
the Wi
Windows
d
version.
Program screen
Toolbar
Test Window
Program elements
Working screen
On the left side, you can find all program elements, which you need for the creation of a control program.
The top line is called the toolbar and you have certainly seen this in other programs. Here, there are, for
example, menus for Save, Open or the Start of a program. The big window is the working screen. Here,
you create the control program. The inputs and outputs for the LT Controller are shown on the right in the
test window. Here, you can turn the actuators on and off with the mouse, for example, to make a test to
determine if they are connected correctly. Just connect a motor to M1 on the Controller and then turn it
on and off with the mouse. In addition, you can check to see if your sensors are working properly. This
shows, for example, if a push-button switch is pressed or is not pressed. In addition, the green bar shows
you if the connection between the PC and the LT Controller is working properly.
30
R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
"So, this was some theory at the
beginning. Now, you would certainly like
to build your first model and control it
with the computer as well."
Merry-go-round –
Entry level
programing
■ You can find various models of merry-go-rounds at public festivals and amusement parks. The first motor
driven merry-go-round was placed in operation on January 1, 1863 in Bolton in England.
• Using the assembly instructions, build the model.
• Connect the electric cables according to the circuit diagram.
• Connect the ROBO LT Controller with the PC over the USB
interface.
• Switch on the power supply on the battery tray (green
LED on the ROBO LT Controller lights up).
• Start the software, ROBO Pro Light.
Note!
In case the green LED on the ROBO LT Controller does not
light up, just shove the switch on the battery tray in the
other direction.
If the green LED is still not illuminated, perhaps
the battery is dead.
Ta s k 1
The merry-go-round is to be turned on and off with the mouse using the test window for
the software, ROBO Pro Light. Which direction of rotation of the motor (counterclockwise
or clockwise) allows the model to rotate correctly?
Press the push-button switch on the model. Now, on the screen, you should see how I1
changes from 0 to 1 when the red button is pushed.
Note!
If the value for the push-button switch does not change from 0 to 1 but from 1 to 0 when it is pressed then
you have not connected the plugs to the push-button switch correctly (also see the description push-button
switch). One plug is to be connected to connection 1 and the other plug to connection 3.
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R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
What is a control program?
A control program tells the merry-go-round what it is to do. The software, ROBO Pro Light, has such a program consisting of various program elements, which are put together with arrows to form a sequence.
Start
Program elements
"Next, we want to create a
control program together."
C
Connecting lines
End
When the program is started, the elements are carried out one after the other. A control program in ROBO Pro
begins with a green little traffic light figure (Start element) and ends with a red little traffic light figure.
Ta s k 2
Can you imagine what the sequence shown causes your merry-go-round to do?
Solution: The merry-go-round motor is started, runs 10 seconds and then it is turned off.
Now it is your turn and you can create your first control program.
Ta s k 3
The merry-go-round is to be started with the push-button switch (I1). It is to rotate for
10 seconds and then stop.
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R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
You proceed as follows:
• The software, ROBO Pro Light, is started, the ROBO LT Controller is connected to the PC and supplied
with electricity from the battery tray (the switch on the battery tray is turned on and the green LED
on the Controller lights up).
• With the button, File-New, you begin a new control program.
z
You put the required program elements
on the working screen with the mouse. You
start with the green little traffic light figure.
Click on the element with the left mouse
button and just drag it onto the working
screen. By releasing or again clicking the
left mouse button, you place the element
at the desired position somewhere on the
working screen.
• As is described in the task, the merry-go-round meaning the motor M1 is to be started when the
push-button switch I1 is pressed. In order to query the switch, you drag the element,
Query switch, onto the working screen directly below the Start element. Both
elements are automatically connected with each other.
• Move the mouse pointer over the element, which has just been inserted. As soon as the cursor turns
into a hand, you can drag the element
when the left mouse button is pressed.
If you press the right mouse button, the
following dialogue box opens:
33
R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
In this window, you can set which push-button switch (I1-I3) you want to
query and if the switch is pressed (1) or not pressed (0). I1 and "switch
pressed (1)" are already preset so that you can confirm with OK.
• Now, as the next step, you are to insert the motor element into the sequence. As before, after the
insertion, you open the dialogue box with the right mouse button.
Here, you set the direction of rotation "clockwise"
(green arrow). The connection M1 is already preset. Leave the slider control for the speed set on
the far right. Then, the motor runs at full speed.
Now, you can close the window with OK.
• Now, insert the element, Time delay.
In the dialogue box, set the Time delay to 10 seconds.
34
R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
• After this Time delay, the motor is to be turned off. Insert another motor element and in the dialogue
box select M1 and Motor stop. Finally, you need the end symbol (red little traffic
light figure). Your complete sequence then looks like this:
• Before you try out the program, you should save it so that it doesn't get lost. To do this, go to the
Save button.
Selected folder
Enter the file name.
A standard Windows window
appears. Here, you can select the
folder, in which the program is to
be saved. In addition, you can give
a name to the file, for example,
"merry-go-round." The ROBO Pro file
automatically receives the extension .rpl. Press the button, Save.
Depending on the Windows version, the window may appear somewhat
h t ddifferent than the window shown
here.
35
R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
"OK, you are already a big step farther.
Your program is finished and now you
can test it."
Starting and stopping the program
To start the program, click with the mouse on the "Start" button.
As soon as you press the button, the merry-go-round turns for 10 seconds and then stops. The program
sequence has arrived at the end symbol.
Beside the button for starting the program, you will find the button for stopping. Regardless of where the
program is at the moment, when you press the Stop command, the program is stopped and ended.
"In order to avoid restarting the program after
every program run, you can put a "program
loop" in the program. “
Program loop
P
Ta s k 4
Change the program so that after the motor stops, it does not jump to the end symbol
(red little traffic light figure) but returns to Query switch. The end symbol is no longer
needed and can be deleted.
Delete program elements and lines
• Click with the left mouse button on the button "Delete"
and then on the element or the line
that you want to delete.
• Another possibility: Move the mouse pointer to the program element or the line that you want to
delete and then click with the left mouse button. The element is marked red. Press the "Delete" key
on your keyboard. When this is done, the marked element is deleted.
Delete the red little traffic light figure and the line between Motor stop and the little traffic light figure.
Then, draw a connecting line from the end of the element, Motor stop, upwards to the connecting line
between the start symbol and Query switch.
36
R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
Draw connecting lines by hand.
End, Start of line
• Move the mouse pointer to the end of the element, Motor stop. The mouse pointer turns into a hand
with a pencil.
• Press the left mouse button and then release it. This is the way the line begins. Drag it with the
mouse in the desired direction (first downwards).
• If you want to change the direction, then click once with the left mouse button. The line is then bent
and you can pull it in another direction (first to the right and then upwards).
• When you get to the connecting line between Start and Query switch then click once again with the
left mouse button. This then ends the line. The program loop is finished.
Note!
If you have drawn a line incorrectly by accident and you want to end it in the middle of the action then you
can do this by double clicking with the left mouse button and then delete the line.
Save the program, for example, under the name merry-go-round-2 and then try it out. Does it work like
you wanted?
Note!
Since the red little traffic light figure is missing, the program must be ended with
ton.
the Stop but-
37
R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
Ta s k 5
Just going in one direction is rather boring. Change the program so that it waits a second
after the motor stops and then the merry-go-round turns in the other direction for 10
seconds.
Do you have an idea which program elements you need in addition to solve this task? OK, I'll help you
again.
When you expand the sequence as shown and then draw a program loop again to the start of the program,
the entire thing is taken care of.
Save this program under any
name as well, for example,
merry-go-round-3, so that you
can use it again later.
In order to open an existing program, you press on the button
which you select the folder and the program that you want to open.
. A selection window appears, in
So much for the merry-go-round. The construction set contains additional exciting models and programing
tasks. Have fun!
38
R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
Pedestrian Light
■ You certainly have seen various models of traffic lights.
You encounter ppedestrian lights or entire intersection
systems
system
m almost daily so that the principle
is not anything new for you. Stated
simply, lights are turned on and off
in a certain sequence.
Build the model using the assembly instructions and then connect the cables according to the circuit
diagram.
Ta s k 1
Program a pedestrian light, which is switched with a push-button switch. At first, the
light is red. When the push-button switch is pressed, the red phase is to continue for
five seconds. This is to be replaced by a green phase, which lasts for 10 seconds. After
this, the light returns to red.
Finished program: Pedestrian Light-1.rpl
For querying of the switch, you are to use the
command "Branch switch." Here, you have three
connections. The program is set as follows: If the
push-button switch is not pressed, go to output 0. If
the push-button is pressed, go to output 1.
For the command "Lamp output," you also have the
possibility of making various settings. You can set the
brightness, the output (M1 or M2), and decide if the
light is to be turned on or off.
39
R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
Ta s k 2
As in task 1, program a pedestrian light, which is operated with a push-button switch.
After the green phase is ended, the green light is to blink to show that the pedestrian light
will change to the red phase in a short time. The green light is to blink three times.
Finished program: Pedestrian Light-2.rpl
Note!
You can find the solution to this task as a finished ROBO Pro Light program at C:\Programs\ROBOPro-Light\
Sample Programs\ROBO-LT-Beginner-Lab\Pedestrian Light-2.rpl.
You can also find sample programs in this directory for all other tasks in this activity booklet.
Lighthouse with
blinking light
■ Lighthouses stand at important or dangerous points where they serve ships as a navigation mark, which
is visible at long distances including at night. With their light signals (beacon), lighthouses show ships the
way and thus allow navigation and the bypassing of dangerous positions in the waters.
Build the model using the assembly instructions and connect the cables according to the circuit diagram.
In the nautical charts, the characteristics of a beacon are described by uniform abbreviations,
for example:
Intermittent light
The phases of light and dark are of equal length.
Flash
The light phases are shorter than the dark phases.
A flash lasts for less than two seconds.
Blinking light
The light phases are shorter than the dark phases.
An blinking light is at least two seconds long.
Ta s k 1
Program a "beacon" according to the isophase principle.
Set the light and dark phases to be of an equal length of two
seconds.
Finished program: Lighthouse-1.rpl
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R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
Ta s k 2
Program "lighthouse lighting" according to the flash principle.
For the flash lighting, set the light phase at 0.3 seconds and the dark phase at 1.5
seconds.
Finished program: Lighthouse-2.rpl
Ta s k 3
Program "lighthouse lighting" according to the blink principle.
Both lights are to be illuminated for a different period of time independent of each
other.
Finished program: Lighthouse-3.rpl
"Gooood, now let's move to a topic, that you
can find at home – a refrigerator. Here, here,
I always ask myself if the light is really off,
when I close the door?"
Refrigerator
■ With the spread of electrical power and the refrigerator, its
forerunner, the ice box without electricity lost its
attractiveness. From a historical perspective, the
word ice box is still used today but when operated
by electricity it is called a refrigerator.
Build the model using the assembly instructions and connect the
cables according to the circuit diagram.
Ta s k 1
As soon as the refrigeration door is opened, the white light is to light up. When
the door is closed, the light goes out.
Finished program: Refrigerator-1.rpl
41
R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
Ta s k 2
Supplement task 1: If the refrigerator door is open for more than three seconds then the
red indicator light is to blink in addition. It also goes out when the refrigerator door is
closed.
Finished program: Refrigerator-2.rpl
Washing machine
"Wash day in the Nineteenth Century:
What a nuisance! Well we have it much easier
today with modern machines."
■ The most
widespread de-sign is the drum
m washing machine, in which a washing drum rotates around an axis. The advantage
of this machine type is the small size so that, for example, it can be installed
in kitchen units.
Build the model using the assembly instructions and connect the cables according to the circuit diagram.
And now what all happens during a washing operation? A washing cycle, a spin
cycle and a drying cycle are performed.
In the following exercises, you will become familiar with and program various program parts.
Ta s k 1
After you push the Start button, the drum rotates at a low speed for 10 seconds (wash
cycle). The display (indicator light on M2) shows the operation of the machine.
Finished program: Washing machine-1.rpl
Ta s k 2
Change the program so that the washing machine only starts when the safety switch for
the door is closed.
Finished program: Washing machine-2.rpl
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R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
Ta s k 3
Place a spin cycle in the program. Here, the motor is to run at full speed for
15 seconds.
Finished program: Washing machine-3.rpl
Ta s k 4
Expand the program with a drying cycle for the laundry. To do this, the drum rotates
clockwise slowly at first (10 seconds) then takes a break of three seconds and then
rotates counterclockwise for 10 seconds.
Finished program: Washing machine-4.rpl
ROBO Pro Light offers the possibility to show certain working cycles such as washing or spinning as text
in a display.
For this purpose, use the program element, "Text output."
You can insert this command at any position into your program if you want to send the user some information.
This information is then shown in the display field on the screen. As for other program elements, you can
place the display field anywhere on the screen.
Important!
The text, which appears in the display, is overwritten by a new text command. If you don't want to display
any text then leave the Text output empty.
Ta s k 5
During the program sequence, the user is always to be shown the current cycle in the
text display. When all washing cycles are completed then the end is also to be
shown in the display.
Change your program accordingly.
Finished program: Washing machine-5.rpl
43
R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
Sliding door
■ A sliding door consists of one or more door leaves. They are
guided at the top or bottom and open to the side.
But don't think that this is an invention of the modern age – sliding
doors existed even in the First Century A.D. in Roman
buildings. This is shown by excavations in
the Italian city of Pompeii.
Build the model using the assembly instructions and connect the cables according to the
circuit diagram.
Ta s k 1
Create a program, which closes the sliding door, regardless of where it is when
the programs starts. Try out various door positions.
Finished program: Sliding door-1.rpl
Important!
Push-button switch 1 (I1) is the limit switch for an open door. Push-button switch 2 (I2) is the limit switch
for a closed door.
Before you become familiar with the new control command, first look at the associated task.
Ta s k 2
There is a light barrier at the entrance to the sliding door. If the light beam is interrupted,
which means that someone wants to enter the business, then the entrance door is opened
and it closes automatically after at time of 10 seconds.
Finished program: Sliding door-2.rpl
You have already programed a similar function for the query of the switch
in the task for a traffic light.
The program waits at this position until the light beam is interrupted (I3=0).
In the dialogue box of the program element, "Query phototransistor," you can
decide if the program is to be continued when the light barrier is interrupted
(0) or not interrupted (1).
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R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
"Ouch"
Ta s k 3
So that nobody is caught in the door when it closes, the door is to immediately open
when someone interrupts the light barrier. Change the program accordingly. Expand
the program with a time delay of five seconds before the door closes.
Finished program: Sliding door-3.rpl
For querying of the phototransistor, you are to use
the command "Branch phototransistor." Here, you
have three connections as well. The program is
set as follows: If the light barrier is interrupted (no
light), go to the output 0. If the light barrier is not
interrupted, go to the output 1.
"Do you know about that too?
You turn the light on in the staircase and after
a certain time it turns itself off. Or it turns on
automatically as soon as you enter the staircase.
How does that work?"
Staircase
lighting
■ A small box, which is normally installed in the main current distribution for
the building, insures that the staircase lighting can be turned on on every floor.
After a time, which can be set, the light is then turned off automatically.
Build the model using the assembly instructions and connect the cables according to the circuit diagram.
Important!
Both push-button switches (I1 and I2) are for the two floors. The motion detector,
here a light barrier (I3), is located, for example, in the basement.
45
R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
Ta s k 1
As soon as one of the two push-button switches is pressed, the staircase
lighting is to be turned on. After 10 seconds, it is to go out automatically.
Finished program: Staircase-1.rpl
Ta s k 2
The staircase lighting is to be able to be turned on both with the push-button switches
as well as by a light barrier.
Finished program: Staircase-2.rpl
Ta s k 3
As soon as one of the two push-button switches is pressed, the staircase lighting is to be
turned on. If one of the push-button switches is pressed again, the light goes out.
Finished program: Staircase-3.rpl
Windshield wiper
■ A windshield wiper is a device for the cleaning of the front window or rear window of a vehicle, airplane,
ship or a rail vehicle. In November 1903, the American, Mary Anderson, received the patent for the first
working windshield wiper system in the world.
Build the model using the assembly instructions and connect the cables according to the circuit diagram.
With the help of two push-button switches, you can query four switch positions and insert them accordingly into your program.
I1
I2
OFF
Not pressed.
Not pressed.
Interval
Pressed
Not pressed.
Continuous operation slow
Pressed
Pressed
Continuous operation fast
Not pressed.
Pressed
You can use the light barrier to control the interval. For this, the light barrier is interrupted after every
wiping cycle.
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R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
Ta s k 1
First, a simple task. As soon as the rotary switch in position
1 is moved, the windshield wiper starts to move. If it is
reset to 0 then the windshield wiper stops.
Finished program: Windshild wiper-1.rpl
Ta s k 2
If there is heavy rain, the windshield wiper is to move faster. This is to happen with
switch position 2. Program your program so that when switched from position 1 to 2,
the windshield wiper moves faster and when switched to 1, it is to move with the
normal speed again.
Finished program: Windshild wiper-2.rpl
"So this is my last task for you. You
can certainly still find many applications yourself, which you can create
with the construction set."
Ta s k 3
Change the program so that in switch position 1, intermittent switch control is created. In this case, the light barrier is interrupted after every wiping cycle. After
two seconds, the wiping cycle is restarted.
Finished program: Windshild wiper-3.rpl
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R O B O LT B E G I N N E R L A B A C T I V I T Y B O O K L E T
You can find additional fischertechnik
construction sets, with which you can
expand your programing knowledge, at
www.fischertechnik.de
If something doesn't work right ...
you will hopefully find a solution for your problem in this table.
Problem
Possible Cause
1. Software ROBO Pro Light can't es- Power supply is not turned on (green LED on the Controller is not
tablish a connection to the ROBO LT illuminated).
Controller.
Battery is dead (green LED is not illuminated in spite of the fact that
the power supply is switched on.)
2. The push-button switch does not
work.
3. Phototransistor doesn't work.
Fault Clearance
Turn on the switch on the battery tray (Caution: The Controller only
works in one of the two switch positions.)
Insert a new 9V block battery, charge the rechargeable battery pack
or use 9V power unit.
USB cable is not connected.
Plug in the USB cable.
USB driver is not installed.
Install the USB driver – see installation instructions, which are
contained in the construction set.
Electrical plugs plugged into the wrong connections of the push- Use the connections 1 and 3 on the push-button switch. Plug in the
button switch or the ROBO LT Controller.
plugs into the two jack sockets for I1, I2 or I3 on the Controller.
For control programs, which you create yourself: In the dialogue box
of the program element, incorrect output M1 or M2 selected.
Check control program and set correct input.
Electrical plugs plugged in incorrectly.
On the phototransistor: Plug in the red plug to the side with the red
dot, green plug to the side without marking.
On the Controller: Plug in red plug to I1, I2 or I3, green plug to the
associated connection.
Lens tip lamp for the light barrier does not illuminate.
Connect the lens tip lamp to M1 or M2 and turn it on.
The light from the lens tip lamp passes diagonally past the pho- Move the lens tip lamp so that the light hits the phototransistor.
totransistor.
Light from the lens tip lamp is weak.
Insert a new 9V block battery, charge the rechargeable battery pack
or use 9V power unit.
For control programs, which you create yourself: In the dialogue box
of the program element, incorrect output M1 or M2 selected.
Check control program and set correct input.
4. The motor does not rotate or the light Motor or light not connected to the LT Controller.
does not illuminate.
Connect motor or light to the LT Controller according to the circuit
diagram for the particular model.
Motor or light connected to the incorrect motor output of the LT Use the circuit diagram to check which output M1 or M2 is to be
Controller.
used for the motor or the light and connect with this output.
For control programs, which you create yourself: In the dialogue box
of the program element, incorrect output M1or M2 selected.
Check control program and set correct output.
The green LED on the ROBO LT Controller blinks very fast (about Check cables and eliminate the short circuit.
four times per second): Short circuit on one of the outputs. Plus and
minus poles are directly connected.
5. Motor rotates in the wrong direction.
For electrical plugs, red and green were mixed up.
Reverse red and green plugs on the motor.
Change the direction of rotation of the motor in the control program.
6. Sample programs for the models can- You don't know, in which folder the programs are located.
not be found.
Sample programs for all models of the construction set are found at:
C:\Programs\ROBOPro-Light\Sample Programs\ROBO LT Beginner
Lab
7. Problem not described here.
Contact fischertechnik directly, for example, at:
www.fischertechnik.de
Not found.
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