Reply To: Oscillation after tuning

PID Tuner Forum Forums General PID Discussion Oscillation after tuning Reply To: Oscillation after tuning


If you are experiencing oscillations, either your control action is too aggressive or your system has to much phase lag. Both conditions are equivalent, if your system has too much phase lag (delay), you are restricted on how aggressive the control can be. Another cause could be hat you are not sampling fast enough.

Without more details about your system it is hard to diagnose this. If both systems are exactly equal in terms of, sampling time, control algorithm, etc. Most likely the issue is hardware, maybe one of your drives is experiencing more friction, which has similar effects as phase lag.

If you want more help, you need to share as much data as possible, one screenshot is not going to cut it I am afraid.