Homebrew PCBs

Eagle has an ULP for isolation routing. See 
<http://www.brusselsprout.org/PCB-Routing/> for some implementation data.
Mark


At 07:20 AM 1/7/2011, you wrote:
>A few years ago before I retired I had access to a large (3ft X 4 
>ft) CNC YAG laser system that I used on occasion to do the same 
>thing. It worked well and I was able to get very fine lines, in 
>fact, too narrow. The laser cut was only about .001-.002" wide, and 
>usually I had to make multiple cuts to get it to etch cleanly. 
>Definitely overkill considering the cost of the syatem, but it was 
>not being used for anything else at the time.
>
>One other problem that needs to be resolved as with any technique 
>like this. You need software to remove the paint between traces. It 
>is much easier to create lines where you want traces. I used AutoCad 
>to draw lines around all connected pads creating "islands" of 
>connected pads. While this worked, the time I spent fiddling with it 
>was not cost effective. You might be able to create a negative image 
>of the PCB traces and find some software that would create a raster 
>scan of all areas between traces. Perhaps if you have MasterCam or 
>some similar program you could create "G code" to accomplish this 
>since it is essentially a pocket routine.
>
>Bob
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