I’m getting back into PCB milling on the X-carve. Below are two results that clearly need improvements; however I don’t quite know what the problems might be.
First: 0.7 mm endmill from Adafruit
Second 30 degree 0.1 mm engraving bit from Inventables
In both cases, I’m using the Dewalt 611 router with a precision collet, lowest RPM that the 611 allows, 5 inch/min feed rate, 1 mil depth of carve.
Granted, there are issues with the design itself (the profile toolpath incorrectly connects the pads). I’m looking for suggestions on the following:
- The 0.7 mm endmill can make nice profile cuts (see the middle left pads and traces); however, the majority of traces grab the copper (proper term here?). Additionally, as seen in the top of the first image, traces are not consistently the same size (both of the horizontal traces should be 16 mil).
- The 30 degree engraving bit provides much cleaner profiles. It may not be apparent given the resolution of this image, but there is still a fair amount of “ugliness” in the trace which may just be cosmetic.
It’s mostly academic, since I can probably get what I want done with the 30 degree engraving bit, but I’m wondering what I might pursue to improve the performance of the 0.7 mm endmill.