Are there any known issues with G41/G42 when using a Local System Rotation of something other than 0 degrees? I am trying to cut an artsy shape where the inside lines are cut without cutter comp, but when I turn cutter comp on to cut the outside I get some really strange moves that are well outside the expected.

I have taken this same program and run it with System Rotation set back to zero and it functions as written. With system rotation of 90 or 270 dgress it is as if MACH is confused about how the axis are rotated and so it wanders around making strange arcs and spirals and not followint he programmed profile.

My fix was to write a little basic program to swap the axis and adjust the G2-G3 so that it would not need system rotation. Also wrote a small Basic program to mirror the pattern across either the X or Y axis and these programs run just fine.

Pete