Hell yeah! Got my first perfect board flip! Board flip jig works! Holes and traces cut on bottom first, then traces and outline cut on top. Alignment between top op and bottom op is perfect to within 25 microns, or about the width of three red blood cells. No offsets in software needed!
Board is a SAMD21E breakout. Gonna solder it together and mess with it in arduino. It's a testbed for HID devices based on SAMD chips. #bantamtools#electronics#cncmachining
Close-up of latest attempt at double-sided machining. Nut pocket and standoff pocket on opposite faces of pi zero case (next to cutout for gpio header). Alignment is within a 3-4 thou. I think I can get it down to just 1. #bantamtools