Homebrew PCBs

At 02:26 AM 2/3/2011, you wrote:

> >
> >
> >When I have some time, I think I want to try using a laser to strip
> >paint (resist) off the pcb. The technology is clear cut and certainly
> >works. I found someone who can sell me a laser that will focus down
> >to 3 mils (IIRC), and I have a pcb cnc mill to carry it. Someone in
> >Instructibles described a using two flatbed scanner carcasses to make
> >a paper cutting cnc laser for <$50 that looks like it would work well
> >for this application, too.
>
>I have time and a cnc machine to try that, but no such sharp laser.
>Could you give me the supplier's contact details, please?
>Cristian


This guy has a small diode lasre that will focus down to .04mm x 
.06mm, (1.6 mil x 2.4 mil). He is in Turkey and sells several models 
on ebay. I exchanged several emails with him and he seems to know 
what he is doing. it appears that he uses the aluminum heat sink from 
a power resistor as the case for the laser and a constant current 
LM317 to drive it. Please let me know if you buy one.

Mark

Name and Email:
Kerim KALELI
engkerim@...