Hi Ross
I just finished the integration of MASSO on my plasma system.
On my first run tests I found that problem, and after analyze the G code I found the THC remain turned on, by M667 code, during all code execution, but this must be turned off just after the plasma torch is turned off by M05 code in order to release the Z axis control.
When THC is on the Z axis does'n respond to the G00 and G01 instructions. You can test that on F2 screen, press the THC button and try to move manually the Z axis and it doesn't respond.
So, I check on the post proccesor that I download from the MASSO web link (MASSO Plasma (with THC).scpost) and after analyze it I modified to always put M666 instruction after the M05, then the system runs fine
Attached are the codes and postproeccesor edited by me.
I hope this help
Ricardo Ruiz