Line Following inside a program?

[Dean Hystad]

Originally Posted by AngyLPer

Thanks for your answers
The PID linefollower works really good for my roboter but the only thing that doesn't work is that i can't place a motor/move block infront of the calibration.

I also tried the programs from nxtprograms.com

I have already tried to solve this problem by using only the calibration part without the rest of the program but it't always the same.
I told the roboter to end the loop until motor B reaches 40 degres.
When there is nothing before the roboter turns 40 degres but when i put a block infront he turns 100 degres.

I think the problem has nothing to do with PID but with the calibration.
I tried using the calibration from the linefolower at nxtprograms.com but it's the same.

I think you answered your problem.

"I told the roboter to end the loop until motor B reaches 40 degree...but when i put a block infront he turns 100 degres."

How does putting a block in front change the rotations sensor value for motor B? How can you correct the problem?

[AngyLPer]

[/QUOTE]How does putting a block in front change the rotations sensor value for motor B? How can you correct the problem?[/QUOTE]



This is the question i ask myself and i don't know why it is like this.
I can't really understand it so I ask you for help if someone knows it?

Changing the rotations loop to less than 40 degrees he turns the same and it doesn't matter if i choose 1 degree or 40 degrees but when i chose 360 degrees the roboter turns 360 degrees.

[Tom Mosher]

Originally Posted by AngyLPer

How does putting a block in front change the rotations sensor value for motor B? How can you correct the problem?

This is the question i ask myself and i don't know why it is like this.
I can't really understand it so I ask you for help if someone knows it?

Changing the rotations loop to less than 40 degrees he turns the same and it doesn't matter if i choose 1 degree or 40 degrees but when i chose 360 degrees the roboter turns 360 degrees.

Perhaps this material will be useful.
http://forums.usfirst.org/showthread...5137#post55137

http://forums.usfirst.org/showthread.php?p=42964

[Dean Hystad]

Originally Posted by AngyLPer

This is the question i ask myself and i don't know why it is like this.
I can't really understand it so I ask you for help if someone knows it?

Changing the rotations loop to less than 40 degrees he turns the same and it doesn't matter if i choose 1 degree or 40 degrees but when i chose 360 degrees the roboter turns 360 degrees.

Think about this. What is the value of rotation sensor B when you START your loop? How does this change if you put a Move block BEFORE the loop.

[AngyLPer]

Yeah it works thank you for all your help

I put infront of the calibration two resetrotation B and C
Then I made a constante (Turning 40degrees) at that compares with rotationssensor C and when its same then he end the loop and it works