> pid control, 100 steps

The minimum PID control has only two steps... The PID control is unrelated
to the number of steps. Having few steps can simplify the PID calculations
very much. However you need to make sure that the output control (servo
driven thing) can deal with stepwise control without doing something that
you do not expect. For example if you turn a vane in a fluid stream in
steps you can cause the vane to stall before the actual stall angle
happens and whatever is downstream from it (a sensor ?) will be
influenced. You need to make sure that your controlled system is modeled
correctly even though you use steps.

Peter

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