Kasey Matejcek wrote: > Yes the ppmc.0.pwm.00-03.freq 50000 > After playing some time I've come up with this it responds from 2 rpm to 14 > rpm when you set s this give and accual spindle speed from about 35 to 75 > rpm > But there is no to little control if load is applied to the spindle > As soon as any p,I,g are added then it unstable surging up and down > Sure, with FF0 only, it is still an open-loop speed control. it is even possible you have the phase of the servo loop backwards. You might try a negative value in P and see if it helps control it under load. If so, then your P, I and D values should all be negative.
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