Our Danish friends David Pedersen and the guys from AC/KW got together and built a CNC machine from scratch. There are lots of videos and pictures of the build on the site. Have a look at the 3D Hacked Gadgets logo, this machine does a great job!
What makes the CNC mill tick? It’s the controller board. I don’t want to go into details on how the CNC controller board has been designed. This is just a quick overview of the project, and a more detailed description of each subsystem will be written some day. The board is based around a central PIC controller, the PIC18f2220. An optocoupler bridge isolate the parallel port cable from a PC from the rest of the board. You cannot see this bridge on the picture below as it is SMD mounted on the back site of the board. 3 arrays of FET transistors are used to provide motor control, and the firmware written to the PIC micro controller is compliant with commercial CNC software such as Mach3 and turbocnc.”
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