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Inventor
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There were 46 questions found in this category:
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 Can I control two motors separately after I've synced them?
Once
you have synced two motors, they will only respond correctly to
commands for the controller motor. For example, the writer of the
program below synced motors A and B, programmed them to move together,
and then tried to program them separately, forgetting that they were
synced. The program ...
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Can I make my car go slower or faster?
Yes, you can change the power setting on the motor icon when writing the program. This will effectively control the speed of the motors on your vehicle. Also, if the car is going slower than expected, you may have low batteries, which can be changed.
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Can I reprogram someone else’s RCX from mine?
One really great application of the reprogram command is to be able to load a program onto another RCX if the program is lost. If, for example, everyone is using the same program, the instructor could have an RCX that has a program to load up the standard program onto everyone else's RCX.In ...
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Create a program that continually checks to see if the light level is at or below 50.
If it is 50 or below, Lamp A is turned on at full power, and if it is above 50, Lamp A is off.
ses
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How can I gradually increase the power level sent to the motors?
This program increases the power level setting to motors A and C in certain time intervals, set to 0s in this example (program in inventor). (Note: you may alternatively use the "wait for 1s" block instead of the "wait for time" assigned to 1s with the constant attached.) Set the time between power-...
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How can I make both motors move to an exact position, in sync?
To
bring two motors to an exact angular location together, you should use
the motor sync icon and the SMART rotational encoder. The program
below accomplishes this:
The motor sync icon tells Motor B to follow whatever Motor A does. The
motor power icon turns on Motor A (and thus Motor B, ...
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How can I ramp up my NXT motor speed in RoboLab?
The program below allows you to gradually increase the speed of your motors from 1 to 100, in a time period of just 1 second.
KBW
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How can I tell which event has been triggered?
If you have more than one event, and only one event land, they all land at the same place. However, this does not mean that there is no point in having multiple events. Instead, this brings up the issue of how to tell which event has been triggered.To determine which event is being triggered, u...
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How do I change the background color in RoboLab Inventor?
To
change the Inventor background color, use the Paintbrush tool box. This
tool box is located at the bottom of the Tools palette. Notice that
there are two overlapping squares in the Paintbrush tool box. To change
the background color, click on the lower right square, choose your
desired color...
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How do I check for errors in my program when using RoboLab?
You can click the small arrow icon located in the top left-hand corner of the block diagram screen. A broken arrow means that you have errors; a non-broken arrow means you are error free. However, this does not always mean that the program will do exactly what you would like it to do; it is your r...
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How do I configure a container?
Unlike other programming languages, containers do not need to be declared. However, you still need to give them values. For example, to set the blue container to a value of ten you use the fill container command, with a constant of 10 wired in:If you are doing multiple operations to the same c...
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How do I do algebra with containers?
There are many available functions to do simple operations to containers. The following multiplies the value of the blue container by five. This means that there needs to be a value in the blue container already.You can also use the values of other containers. For example, the following divides the ...
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How do I edit a wired in number?
There are many different tools that can be used to edit various features in Robolab. To cycle through them, you can tap the TAB key or click on Window -> Show Tool Palette to see the toolbar containing the tools. The tool used to edit text (and add comments) is selected in the screen shot b...
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How do I multiply floating point values (decimals) in ROBOLAB 2.9?
The multiply block does not preserve the floating point status of its input factors (the digits to the right of the decimal point). For example, if you store the floating point number 1.68 in a container and then use the multiply container block to multiply it by 10, the resulting container value is...
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How do I use container.ctl?
There is, of course, always the case where it is useful to use more than the standard three containers. In this case it is useful to define your own container using container.ctl. All of the containers have their own designation, starting with red they number 0, 1, 2, ... and so on. ...
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How do I use multiple containers?
Multiple containers work exactly the same as a single container. It is just very important to not get confused about which container does what.
It is easy to use the standard containers--just wire in the container that you want to use:
To see how to use more than just the standard red, blue, and y...
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How do I use subroutines?
Subroutines are parts of a program that only run when the green 'start subroutine' icon is used. Each subroutine is numbered, and each can be called upon to execute at any point during the program. It is important to note that as soon as the subroutine has ended, the program returns to the point in ...
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How do I use the Interrogate RCX function?
The interrogate RCX command is a very useful way to see what is going on with your program while it is running. Interrogate RCX opens up continuous communication between your computer and the RCX. To open interrogate RCX go to Projects -> Interrogate RCX.Here is a program that se...
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How do I wire task splits?
Task splits allow the RCX and NXT to execute two tasks at the same time.Here is an example of how to use a task split:The biggest mistake people make is to try to simply connect the wires instead of using the task split icon:The other major problem people have is attempting to merge tasks:As long as...
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How do you wire in a number (or constant)?
Under modifiers there is a blue box labeled 'numeric constant'. (The name of this - and any other - tool should appear at the top of the toolbar.) Drag the numeric constant box to an appropriate location. Once the constant is placed on the screen, press the spacebar (to change to t...
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