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Milling PCBs: Leaving behind "threads" of copper

2017-02-09 by me@...

I am milling PCBs. I am using Flatcam to produce the gcode and autoleveller to "level" the code. Over all it does a great job. But I am noticing what looks like "threads" of copper in between the traces. Typically the "threads" hug the traces. I can remove them easy enough with a scribe but the process can be tedious.

I am using a 30deg etching bit .1mm. I set flatcam so it overlaps 22% and I am cutting 3 bit widths.

Any one else milling and have seen this problem?


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