Discrepancy in Roughing Z and Outline Z at bottom of pocket

Kiri:Moto CAM
1

Have a simple square cup shape I am milling, and it comes out very close to perfect with just with a roughing pass and a outline pass. However there is a small problem. The end depth of the pocket is Z=1.0mm, the roughing path bottoms out at Z=1.01mm (from g-code inspection), and the outline path bottoms out at Z=1.217mm (from g-code inspection). While I can ignore the 10um error in roughing, the 0.217 mm error is outline is easy to see, even in preview. This is with a step down of 0.42mm, lowering the stepdown reduces this error, but I can’t seem to get rid of it. Also, I thought that using inside only for one pocket outline might get rid of it, but it is still there. Any advice?

RoughZvsOutlineZinPocket.kmz (399.1 KB)

2

the outline operation does not have an option to match faces like roughing does. the best alternative with the current operation set is to use a trace operation to clean up the pocket and let outline do an outside-only pass for cutout.

replace-outline-with-trace.kmz (724.7 KB)

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3

Thanks Stewart. This would be a great feature to add to outline.

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