
Leonardo made this DIY CNC machine from CD-Rom drives, that is available at Github:
Hardware
1x Microchip PIC16F628A
3x Easy Driver v4.4 Step Motor Driver
1x PL2303HX USB-Serial TTL Converter
3x CDROM Drives
Some wood/screws for frame and wires for electronics
Via Hacked Gadgets.
Check out the video after the break.

Really nice project but no diagram?