--- In
Homebrew_PCBs@yahoogroups.com, mlerman@... wrote:
>
> I'm interested in the optics, too. If we could produce a spot of .001 inch or so, we could use it to remove paint resist from a pcb, just like a cnc router. Then etch and done. The plotter can be a simple xy - used ones with a resolution of .001 inch seem to be readily available.
I doubt a 5 mW laser could remove paint off copper sheet. Maybe a 50 mW IR laser. This would be really tough to focus and set up safely.
Also, even a 50 mW laser would probably be really slow.
Jon