If all has checked out as level and square no lose mechanical's run an older file that you know worked fine if no difference, try to rotate the workpiece 90 degrees in software re-code and try again, have you used Engraving tool path in Vetric? set the start depth to 0, set (all the next advise depends on cutter used) Flat depth to say 0.5 set your tool up with a pass depth of say 0.5, step over say 40% and code up and test, also check the DSP has no off sets setup.

Phill