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Subject: Re: [Homebrew_PCBs] Eagle PCB board file for testing min widths

From: Mark Brueggemann <qrq_cw@...>
Date: 2008-08-20

--- Henry Liu <henryjliu@...> wrote:

> I want to test how fine a resolution my lines can be.
> Would be nice to get a good assortment of 1-12mil widths and
> clearances.

Do you have much experience with the Haas machine? I use a
QuickCircuit at work, and anything smaller than the 10mil bits
is virtually impossible. I can't find a combination of bit
and feed speed that won't break the bits. 12 mil gaps is about
as fine as I can do reliably, saving the 8 mil to carve out gaps
between IC pads. Widths of course aren't much of a problem as
it's a subtractive process. EAGLE generates the gerber and
drill files for the quickcircuit software just fine, just getting
the flippin' thing to carve it out is a challenge. Time consuming
at best. A complex board takes hours and hours...

Mark B.
Albuquerque, NM