I am having an issue when doing 3d carving that the z gets lower and lower during the cut.
We checked all the mechanicals and found no issues.
During the debugging I shot this video
https://youtu.be/DPSKu8uQxPYAfter running the file and stopping and using MDI Z0
the z goe to what it thinks is zero based on the dro, If I go into configure options in Mach4 and change the read ahead line to any number, The DRO resets with the actual height of the z. Running MDI Z0 now properly zeros the machine to the original zero setting.
Attached Mach4 profile and the gcode that we found the problem.
Thanks
Mark