In polar coordinate tool never crosses part center line, built in function of polar coordinate is to rotate C axis instead so that tool always works on positive side of X axis. I don't run Mazaks so I don't know how this is handled but I assume there is a code that serves same purpose. G12.1 is equivalent of G112 which I see in your first post screenshot, G113 is equivalent of G13.1 There was also no activity in configurable properties. In addition, I notice that on the Haas edition which seems to work, this code G112 does not appear. , Mazza, John : See- 6,264,804, 07/24/01, Cl. Maybe it should be added to the post pro before editing the program? I tried to add this code (G122 replace G112 on Hass / Fanuc) directly in the program but without success, the machine still drops in X-50 is below its capacity. Only unlike the Post Pro Haas, 'Use Polare coordinate' is not offered on the Post Pro Mazak in the link above.