Not a big deal for this board, as it would be easy to cut out on the band saw, but more complex boards may not have this luxury. I also didn’t cut all the way through with the outside profile. I ended up using my Tiny Drill Press to finish the holes, and it didn’t work very well as it was difficult to hit the center. They were close, but not quite all the way through. When I thought the board was cut out enough I pulled it off the machine. I might want to use a different bit next time. It worked, but I miscalculated how deep it would need to cut, and ended up lowering the z home and re-running the job again. (Sorry, no photos of drilling!) I then switched back to the engraving bit to (attempt) to cut out the board… I swapped the bit from engraving to drilling and drilled all the holes. I’ll use double-sided tape next time, which will also help with cutting the final profile of the board. The board wasn’t completely flat, and bowed slightly in the middle.
Yeah, I did not have double-sided tape, so I just taped the board down to my spoil board. Not bad! You can also see a little mark on the copper board where I homed the machine. Here’s the “isolation milling” I did with the 60 degree engraving bit. (I may want to try some 45 degree bits and 0.6mm bits next time.) I had some bits I grabbed from eBay, 0.1mm Carbide PCB Board 60 Degree V-shape Engraving Bits and 0.8mm Carbide PCB Endmill Engraving Bits (a total of 20 bits for under $10) to work with, so that’s what I used. I wasn’t really planning on documenting this in-depth, but I got a few photos and screenshots, so I’ll share what I can.
#MAKELANGELO INKSCAPE GCODE HOW TO#
The two useful posts I found were: PCB designing and isolation milling using only free Software and Hello World, How to Mill Printed Circuit Boards (PCB). (I should note I planned to use Fritzing, Inkscape, MakerCam, and GrblController, all free/open source software available on multiple platforms.) I knew the basics, but did a a quick search for posts that might explain things a bit more. I’ve typically made my own printed circuit boards at home by etching them with chemicals, but the mill opens new opportunities to etch and drill the boards, so I gave it a shot. One of my goals with the Little CNC Milling Machine was to make my own PCBs.
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