Very nice! Mine is a bit different (cruder). I used an industrial XY
stage, 6"x6" with stepper motors, mounted on the end of my Sherline
mill. A homebrew Z stage drives a Dremel tool up and down. I have not
yet optimized for speed, as I have a limited number of bits on hand. I
use a PIC16F876 to accept (a subset of) CNC commands and drive the
steppers. A DOS laptop reads the Excellon files and generates CNC
commands. It also has a jog mode that allows finding the corners of the
board and rotates the coordinates to compensate for misalignment of the
transferred artwork relative to the axes.
I did all of the hardware and software myself.
Kerry
DJ Delorie wrote:
> Been working on this project for a long time, finally got some results...
>
> DIY CNC 409 0.0145" holes in 12 minutes
> www.youtube.com/watch?v=SR1y6Eq19EU
>
> The CNC machine uses three brushless DC motors instead of steppers, I
> had to make my own controller boards, write the firmware, build the
> table... many steps.
>
> controller page: www.delorie.com/electronics/bldc/
> photos: www.delorie.com/photos/cnc/ (including close-ups of the drilled board)
>
> I have an excellon-to-gcode script for drills if anyone's interested,
> although there's some new features I still want to try, and I want to
> see how fast I can get the drilling cycle to go without breaking any
> bits :-)
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