Hello, i buy purchased XHC MK3-ET controller and im having a problem.
I cannot get it to run THC in Mach3 Plasma mode.
Im using PROMA THC 150.
Mach3 is reading inputs in diagnostic(ARC OK, UP, DOWN) but Z axis doesn't move or when it does, its going random and passing min max values.
I read that cnc controller for that function should have a THC support.
Is it possible to write some kind of script/macro to get it running...
Thx

Short answer NO.

Short answer NO.

Will replacing THC 150 with SD be a good idea?

I have a feeling that it is the XHC controller that you will need to replace 

Tweakie.