Servo gain adjust on Z axis ?

[mishikwest]

05 vf2ss. Machine continually hums on the z axis. A tech adjusted the servo gain years ago but I certainly don't recall the #'s to adjust. There is P,D,I gain for the z axis. Anyone familiar with adjusting?

[Pondo]

There are 4 bit switches in the parameters for each axis that can be adjusted. They are Low pass 1X, low pass 2X, Dfilter X8, and Dfilter X4. Change them 1 at a time (either to a 0 or 1) and it will get rid of the humming. My mill had a similar issue in the Y and Z axis. Changing the parameters took care of it.
(Don't forget to change setting 7 to allow the parameter changes, plus it must be in E-Stop to change parameters)
Parameter 1=X axis
Parameter 15=Y axis
Parameter 29=Z axis

Hope it helps.

[mishikwest]

never mind. Fixed it. parm 29 low pass and d filter changed till no noise.

yup! thx for the reply anyways!