This may be a stupid question but is there a way to reverse the direction of cut? I cut out a Piajet3d and had to sand all of the outside cut edges because on all of them the cut path moved so that the cuter ws rotating into the part instead of away. The scrap foam had great edges and all of the cut parts were covered in fuzz.
Did you make sure overhead gantry option was selected before you output your code? If not it will cut backwards thinking the bit comes up from underneath
Gadzooks... I'm into day 3 on getting back into my PP3 after shelving it for about a year. This is one of the problems I've been having. Thank you for asking this before I did Helno, and thank you Jnida63 for the answer!