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DIY HACK - Etch CNC
Check out this cool etch CNC. Actually we were thinking of making this too, but since it’s already
made, we can learn from it and make it quicker. Awesome! 
I am using a retrofit machine that fit within my budget. It’s a 2-axis machine with approximately 170×130mm travel.
The circuit board is my own design, using a ULN2803 per motor to supply approx. 0.3 amps per winding. The power supply is a standard AT hard-drive power connector, with the +12V used to power the motors. It’s a simple constant-voltage L/R drive. I made the circuit board using EAGLE, and milled it on Chris’s real CNC milling machine (which is powered by EMC and AXIS, of course).
Also check out:
Schematic of the driver circuit
via 
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nice, there are some people that are pros at e-a-s