I've recently built a CNC machine out of various pieces of high-quality salvage. With the money I saved in the construction of the system I bought a controller and software, the excellent MK2 CNC USB controller from Planet CNC
. This forms the interface between the computer and stepper motor drivers and is controlled by a sophisticated program capable of importing Gerber files, DXF files and other useful formats. I'm using Pololu stepstick boards to drive my NEMA23 stepper motors but at the moment they are just sitting on a solderless breadboard; not the neatest of solutions. I decided that the first task I would use my CNC machine for would be making a PCB to tidy things up a bit. This is the story of how I used my system to make a completely different PCB. This instructable assumes that you have a CNC miller controlled by the Planet CNC CNC USB controller, properly aligned and calibrated.