I have a Mazak QT-10 (1986) with a Mazatrol CamT3 control. I was wondering if there is an M-code to call for the C-axis to engage and disengage. I don't see one in my M-code list that came with my machine (used). I can engage and disengage the c-axis with no problems in the "jog" mode of operation. I can also "home" the c-axis and jog the axis in both directions. On some occations, the c-axis will "shake" when I am jogging it into position. I assume that this may be a feedback problem with my encoder. But it is an intermittent occurrence. Any suggestions would be appreciated.