Homebrew PCBs

First off would be making sure you have a very accurate machine and a good
setup, and also a spindle with very little runout.  You need to hold your
boards dead flat, and you'll need to have control over your cut depth to
within a thou.  Precision engraving where the negative space matters is
pretty brutal.

Precisebits (precisebits.com) sells the best quality micro endmills and
engraving tools I know of, and I've looked pretty long and hard as I go
through a few thousand dollars of them a year.  Harvey Tool also makes nice
stuff, and more specialized micro mills than anyone else I know of.

-Bob Garrish
 (I own and run a CNC machine shop, mainly doing small and high precision
parts)


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