Ive got a Fadal VMC4525. The Z axis buzzes. Im fairly certain it is a axis gain issue. My problem is I cant seem to locate the required potentiometer. I found the balance adjustment. there are two pots for balance it seems.
Quoted below is from the maintenance manual.
"At the amplifier to be adjusted, use a small screwdriver and turn the SIG2
potentiometer until the monitorís display of the appropriate axis reads the
following error: 595 - inch ballscrew / 302 - metric ballscrew."
any help would be much appreciated