Fifth CNC Experiments

by Octapoo

Sunday, July 19, 2020 at 07:08:00 UTC

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Part of a failed attempt at making my first PCB with this thing.

The interesting thing about this picture is that the holes you see were drilled from the opposite side, where it wasn't possible to see the boxes that the holes were supposed to be drilled through.

The pattern isn't very interesting because this is the top side of the board and so most of the cuts simply serve to isolate pins from the top copper layer, as I'd designed a single-sided board and then remembered that all of my PCB material is double-sided and thus I have no choice but to figure out how to make double-sided boards.

I'm not sure what caused it to fail to cut into the copper on the right, as the process I've come up with starts by electrically measuring the height of the copper at every point on a 5 mm grid, and the way it failed, like the whole right side of the board didn't carve, an area of like 50 grid points. I'll have to think about what could have happened but so far my only guess is that between measuring the height and actually carving the board, I moved the machine in some way.


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