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Originally Posted by Astronouth7303
What exactly is PID supposed to do? Is it a fancy way of having whatever get to a certain position?
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PID stands for Proportional Integral Derivative control. Yes, basically it is a "fancy way" of getting "to a certain position." It's what is called closed loop control -- you have a sensor telling you where you are, you have a setpoint telling you where you want to be, and you try to get the two values to become equal by modifying an output (to a motor, for instance). There's another thread out there on the matter, and
google'll provide a lot more info on the matter .... it can get complicated, but most applications related to FIRST should be fairly straightforward. Note that you don't have to include all the different elements of a PID control; for instance, for our Arm this year, a simple P control worked quite well, whereas for another appendage we had to use something a bit more complicated.