Andy's knee mill project

Yes, that can happen. If your Z has a lower acceleration X and Y will slow down to stay in sync with Z. And if you don't specify the path following mode and use the default G64 the X and Y path could be not on the line.

www.linuxcnc.org/docview/html/gcode_main...#sub:G61,-G61.1,-G64:

And my guess now is that you might not have read this page:

www.linuxcnc.org/docview/html/common_User_Concepts.html

John