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Subject: Isolation milling limitations - trace width and spacing...

From: "Chris" <lcdpublishing@...>
Date: 2009-12-31

Hi guys,

I have a fairly accurate CNC machine I built for drilling PCBs but now want to see what it can do with isolation milling. I am curious as to what I can expect for the minimum trace width/ spacing?

The machine itself should be accurate to within .0005" (13 microns) as it uses linear encoders of that resolution. The spindle does have a bit more runout than I would like as it is about .0015" (38 microns)

If you have recomendations for an engraving bit supplier I sure would appreciate hearing your suggestions on that too.

Chris