Sorry if the formatting of this is messed up, I'm trying to get fancy...
Speaking as someone who does this for a living, ignore these other folks on this one...
Chris, we import the artworks, but we create them with closed polyline outlines and thus they import
relatively cleanly. I'd say about 2%-5% of the traces require cleanup (ends don't match, double entities, etc.)
But again, that's all closed polyline stuff. You might try (and I'll emphasize TRY) to create gerber files
and then import them back in. It may help out, but I tend to doubt it. There may be an Autocad LISP routine
that would help you,
In our case, we developed a pair of routines that facilitated this. The first one takes said polylines and
creates the trace of a fixed width on a seperate layer (so you freeze the centers to preserve them) The
second routine basically does the same thing but creates differential pairs with fixed width/spacing.
Unfortunately, since I'm pretty sure you work for someone whom Boeing would consider a direct competitor,
it would be inappropriate for me to pass the routines on. They aren't all that complex, but without
understanding your needs its hard to say if they would work for you. The guy who programmed these for
us may be available, I'm not sure what happened to him over the last couple of months. He left us to
work for Autodesk, but I think he's moved on. I can try to track him down if you'd like. E-mail me offline if
you're interested, my e-mail is below.
Depending on how complex the artwork is, this stuff will really, really, kill system performance. I've
done a lot of small (2X2) alumina stuff this way, but some of the larger (5X7) TMM-10 boards we've tried
have really bogged down. For large stuff, you have to do it in sections. The more information on a complex
the slower the recalcs.
Joe Beauchesne
Boeing Satellite Systems
joebeauche@excite.com