Not milling PCBs for a long time, gave it a try today.
First photo: cheap v-bit from China, 30deg, Z=-0.07mm, plunge feed 30mm/min, milling feedrate 80mm/min, autolevel 20mm/min, every 10mm. Sand paper treatment after milling job completed, still bad quality and board not usable. I am not going to use v-bits anymore for PCB milling.
Second photo: more expensive PCB milling bit from Germany, 30deg, variable Z=0 to Z=-0.65mm step every 0.005mm, plunge feed 20mm/min, milling feedrate 80mm/min, autolevel 20mm/min, every 10mm. Starting from Z=-0.01 traces looks very nice.
But I am still not convinced what should be the rule to set depth in Chilipeppr and get whole PCB milled properly.
Copper clad is clamped directly to the wasteboard. Is it better to use mounting clamps like this one: https://www.thingiverse.com/thing:1767750
What is your experience?
Yeah, I stopped using v-bits for same reason. You end up with curled up copper on all traces and end up doing lots of sanding which can end up removing thin traces. I found tapered stubs or flat end mills better. 0.3mm flat end mill is nice and cheap. Tapered stub more expensive, but thinnest isolation paths.
@Camilo_A_C Nice looking board. I’ll try going higher feedrate. What is your traces width? I am using 24mil, to get safe margin reasonably high. Thanks for sharing.
