https://forums.autodesk.com/t5/hsm-post-processor-forum/disabling-g2-g3-arcs/m-p/6095168#M25691 This probably belongs in the post processor section..<BR /><BR />allowedCircularPlanes = undefined; // allow any circular motion<BR /><BR />This line, found right near the top of the post, sets which planes arcs can occur on. I forget the syntax, so someone can probably jump in and help.. I believe setting "1" in place of "undefined" will limit planes only to the XY plane, and will output linearized approximations for YZ/XZ arcs. This is probably a better compromise than eliminating them all, and I think it's worth a shot before linearizing them all. Tue, 06 Oct 2015 17:58:50 GMT Rob_Lockwood 2015-10-06T17:58:50Z