can anyone explain to me about arc voltage shift for PlasmaCam?

Ironworks,I need to go to the manual and will get back to you as soon as possible,Thank you

Marlinworks,sorry I adressed the wrong person,I need to go back to the manual for more info,thanks

Marlinworks,I found all the information in the manual (of course) and now understand.It is somewhat difficult to explain. Setting the Z axis,chapter5-7 and 5-8.Also Z axis calibration, chapter 6-54 and 6-55.
I had to read several times to understand it. Thanks

I understand the arc shift voltage is a feedback voltage from the plasma cutter used by the plasmacam controller to maintain the torch cutting distance from the material. This actually works pretty good, but the method used limits the z-axis use by the computer, the z-axis is a dummy and cannot be computer controlled.