Hi routercnc,

Thanks for shareing. Las night I did some experiments. But now I realize I only did contour cuts. I tried all compensation options but results where the same. Inside dimension spot on and outside 0,3mm extra.

Does Mach3 DRO shows coordinates with compensation or without? Since DRO (both work and machine) was spot on but cut was 0,3mm off... Right now I already doubt my axis calibration. Workshop is a bit colder but i dont think shrinking is to blame here.