I'm doing test cuts on my finished CNC, still learning how to use the CAM program (MasterCam X2), so am a total newbie to CNC. I programmed (through Rhino) to do two series of circular extrusion cuts, one inside the other. But when I cut it in insulation foam, the straight cuts ends up becoming stairways (and oblonged oval instead of a circle because of this stairway problem).
I haven't really fine tuned my newly finished machine yet. But still, I don't see the reason why it would go back to the entry point in a different location after each depth cut. Any ideas? I attached a pict of the end result.