Omron SYSDRIVE 3G3MV User Manual page 167

Advanced Operation
·Suppression of Short-cycle Vibration
Vibration with a wavelength almost as long as the differential time results from exces-
sive derivative (D) control. The vibration can be suppressed by setting the derivative
(D) time to a smaller value.
If the vibration cannot be suppressed after the differential time is set to 0.00, set the
proportional gain to a smaller value or the PID primary delay time constant to a larger
value.
Response
Before fine tuning
After fine tuning
Chapter 6
Time
6-25