Most CNC workflows start with a 3D model, which is then passed to CAM software to be converted into the G-code language that CNC machines love and understand. G-code, however, is simple enough that… ...

A more common approach is to use your 3D printer to build a CNC machine. Of course, converting the other way (that is, CNC to 3D printer) is almost trivial.

MIT students have created a portable factory for rapid prototyping, fitting a 3D printer and a CNC milling machine inside an ordinary briefcase.