We can't (yet) generate G-Code directly from OnShape ... so ...
We currently generate the CAM CNC toolpath and G-code for the Mach-3/OmioCNC using AutoDesk Fusion 360
These 2 links provide some reasonably verbose instructions (with screenshots), about how to generate a milling toolpath and G-code from Fusion 360:
We can't (yet) generate G-Code directly from OnShape ... so ... We currently generate the CAM CNC toolpath and G-code for the Mach-3/OmioCNC using AutoDesk Fusion 360
These 2 links provide some reasonably verbose instructions (with screenshots), about how to generate a milling toolpath and G-code from Fusion 360:
I added a wiki page with most of the steps to generate G-code from Fusion 360 here: