Originally Posted by
machinehop5
...yes, you're welcome. You said you cleaned and check the Tach brushes and lightly blew off all the carbon dust inside the motor. So, at this point we could 1st try turning down the COMP Pot (outlined in red) on the Z Drive...it should be the 3th Pot in the attached photo.Check printing on case should be marked. . Turn off Power for 15 mins (Cap Discharge) or so and Use a small screw driver to adjust 1 Turn CCW...then Power up machine to see if, it stops the oscillation.