I have a system using mach 3 and for some unkrown reason it crashed the other day. defore this it was working perfectly. after that I had to reconfigure everything. now when i try to engrave text i get a serries of circles in the middle of the program. I use bobcad v.25 and until this crash all was well. when i run a simulation in bobcad all is well.it goes to hell in a handbasket in mach.any ideas on how to fix this would be greatly appreciated.-Andy

Sounds like it could be 'crop circles' - In Config / General Config set the IJ Mode to the opposite of its current setting and see if that corrects the problem.

Tweakie.

Thanks Tweakie. Perfect!!!-ANDY

Best to have the G91.1 or G90.1 in the first line of your code, that way it will always be correct no matter what is in general config.
Hood