When I'm machining in actual, it seems my dimensions are not 1:1 compared to my CAD and CAM design. I run a simple test program to check the accuracy of the post processed dimensions. I made a 100mm long slot with 10mm dia cutting tool (as attached). When I post processed it, it shows movement in X-axis -83mm (as attached). Do I need to do something with my settings? I'm using Cam Express 12.0 and also tested in it Solid Edge Cam Pro. Same result.
N70 & N80 are your yellow curves. This is governed by non-cutting moves -> Engage
N90 = the cut = cyan curve
N100-N110 are the white curves, this is governed by non-cutting moves -> retract
The reason N80 is not "X-50" and N90 is not "X50" is also governed by non-cutting moves - so you start the "cut" motion outside the part (rather than engaging into the part). You can play with non-cutting moves -> Engage to remove the extra distance and make the cyan line start at the edge of the part (if you want, but I would prefer it look more like it does)
If you need help on the non-cutting moves -> Engage dialog (or any other in NX) hit the "F1" key while the dialog is open - this should route you to the proper section of the docs
Ken Akerboom Sr CAx Systems Engr, Moog, Inc.
Production: NX10.0.3.5 MP16/TC11.2 I'd rather be e-steamed than e-diseaseled