Potentiometer PID

[Robby]

Originally Posted by Greg Marra

Correct me if I am wrong, but that is NOT a PID loop. All that is going on there is a proportional control based on distance of the arm from the target. That code does not account for the integral of error or the rate of change of error, making it a P loop, not a PID loop.

So that will control the arm, but it is not PID control.

Correct. Although the way PID loops are generally created is by adjusting the P portion until it almost works and then adding the I portion until it is almost there and then adding the D portion to make it work better. A lot of the time, depending of what you are doing and how much precision you need, you'll find that the P control may be all that you need.