Homebrew PCBs

DJ,

The spiral patterns are very nice to qualify the process once a track &
space has been preliminary selected. 

I saved your link if I happen to need it in the future.

Thanks for taking the time to create the patterns and the detailed data on
the website.

Bertho

 

From:  DJ Delorie  Sent: Sunday, May 01, 2011 21:57



"Boman33" <boman33@... <mailto:boman33%40vinland.com> > writes:
> With all this ongoing work on testing printers and procedures, I added a
> Test Target for PCB traces to my old US Air Force 1951 standard test
target.

IIRC Stouffer (the step gauge people) also have a resolution test gauge,
which is (in theory) a "perfect" pattern to test UV exposure resolution
with.

Also, a while back I did a set of "spiral challenge" patterns:

http://www.delorie.com/pcb/spirals/

Adam's idea was that it's easy to do one or two traces at a given size,
but you can't say you can do that size unless you can do it reliably -
like a 4cm square spiral. These patterns let you test for a LOT of
trace length, both for shorts and opens.



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