I have a strange problem with Z-axis controle.
When I load in the G-code file everything looks normal, Z-range is between +12 and -18.29 as expected.
When Mach runs the file, Z-axix goes deeper than -18.29, it goes down to -19.********* so I stopped the machine in order not to damage the fixture.
The indication on the Z dro is consistent withZ-axix positions, so it indicates -19.********* as well, so no calibrating problem.
All offsets are 0.
It's a fresh installation ( a few weeks) and the tool is a straight MDF one with square edges.
X and Y seems to be normal.
The same problem occurs with another G-file where it goes over 2mm deeper than it should, again I stopped the machine.
Again DRO indication and Z position are consistent. Retracts are too low so the tool hits allready milled areas on aproaching the end of the job.