I have a Kflop / Snap with two DC servomotor -enc (4000 count per rev).  I set up the Input0 gain to -1 because of the encoder count direction.  The encoder position counts up with the motor rotation CW.   The gains are currently P0.5 I 0 D 0 and the motors oscllate about 1/4 rev at standstill at about 4 hertz.

I tried engaging the low pass filter on one motor and the motor runs away.  I checked the encoder count on the AXIS screen and it now counts the opposite direction  i.e. counts up with the motor turning CCW.    I tried clearing the filter and engaging it with the cleared values.  Same thing.  Should the filter have that effect?

I was not using the Step position tuning screen.  Just compiled and ran the init file and went directly to the filter screen.

The only way I've been able to clear the effect of the filters once they are engaged is by shutting down power and restarting everything.

Any clues?