While cheap hobby CNC mills and routers are great machines that allow you to build things a 3D printer just can’t handle, they do have their limitations. They’re usually powered by a Dremel or other ...

Paused for the summer is the CNC milling machine project, but an eye is being kept on suitable electronics. My set-up has external stepper motor driver boxes, and so on-board drivers are superfluous.

Modern milling machines look much the same as they did 30 years ago. However, they now must cut superalloys, titanium, and high-tensile steels to closer tolerances and at faster rates than before. To ...