JoshM:

The z-only g-code is the same error I encounter when the tool width matches the width of a pocket.

https://forum.freecadweb.org/viewtopic.php?f=15&t=25396

Perhaps we are seeing different faces of the same problem?

Russ

[edit]

Does your tool match the width of the cut?

I've simplified the project as far as I can to illustrate the problem. It consists of a 30mm pocket cut from a larger block. I expect a straight path down the center of the cut. A 30mm tool does not generate any g-code. However, a 29.999999999mm tool generates the expected path shown here: https://i...