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 170x130mm 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
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nice, there are some people that are pros at e-a-s