about 20 mil under heat and pressure. 1/4 oz boards are great for etch time but the
underlying glass fabric causes visible waves in the transfered toner.
George
On Wed, 2006-07-19 at 22:10 -0400, DJ Delorie wrote:
http://www.delorie.com/pcb/ Read the section on "PS bloat setting". I have a sample .pcb to use to calibrate it for the smallest traces. > 1. Has anyone made their own positives or negatives or direct toner > transfer boards with postscript to etch better than 10 mil traces? > If so, please tell us more. My laserjet is good to about 5 mils, at least for the printing part. Below that, the fuzzy edges (from the toner, not the printer) seem to be "big" compared to the traces. I think one of the tricks is to find 1/2 or 1/4 oz clad boards, instead of the common 1 oz clad. > 2. what is a good converting program from gerber to postscript? Er, pcb? Just export postscript; that's what it's for. Don't even bother with gerbers. > 3. Does the pcb postscript output dialog have choices to tweak X, Y > scales independently as well as apply bloat and shrink, or should I > be planning on some postscript post processing? Not yet. The API has a hook for it, but nothing supports it yet. Should be easy enough to tweak the .c sources to put the scale where you need it. > 4. Panelizing layouts... Chris Emerson mentioned there is > something in PCB already -- pointers? Cut and paste, nothing else. _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
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