Homebrew PCBs

>I still think etch undercut can be an issue

No more so than over-exposure or over-development IMO. I actually use 
undercut to get rid of the inkjet jaggies;

Artwork with jaggies;

http://www.pbase.com/eldata/image/45947532

Etched board using above (warning: very large image);

http://www.pbase.com/eldata/image/46673206/original

The etched board looks like it was from laser artwork. The undercut 
is no greater than the width of the jaggies. Why would the undercut 
be any greater with a 5 mil track?

6/6 rules artwork snippet;

http://www.pbase.com/eldata/image/62430331/original

Etched 6/6 snippet from the above;

http://www.pbase.com/eldata/image/62430370/original

All I'm losing to undercut is the jaggies. Why on earth should I get 
rid of this bubble etcher in favor of a spray etcher?

Was this etched or milled (warning: large image);

http://www.pbase.com/eldata/image/57044297/original


Bottom line, you shouldn't have to try 6/6 or 5/5 rules in order to 
determine whether it can be done. You should be able to determine 
that by inspecting your 10/10 rules results. If the printer is the 
limitation then the artwork is going to tell you that before having 
to go any further.

--- In Homebrew_PCBs@yahoogroups.com, Adam Seychell <a_seychell@...> 
wrote:
>