Homebrew PCBs

Hello,

Is this to be used for exposing the pcb directly? Or a photofilm?

Bacause there are photofilms which can work with a standard red hene 
wavelength diode. (600-675nm)

You'll need opticcs to focus the beam, and good parallelism between 
axes and table, to keep the spot size consistent.

Be aware that either way, using the cnc/plotter in this xy way is 
SLOOooowwww.... (And you've got to maintain "safe" lighting condition 
during this time.)

My cheap machines can easily accomodate this usage, but I'm looking 
into offering a cheap drum type photoplotter as well.

Along that thought, would an 8x10 or 12x12 film size be adequate? Or 
do you guys need 12x18?  Or?

Ballendo


--- In Homebrew_PCBs@yahoogroups.com, Cristian <bip@f...> wrote:
> 
> >
> > > I'm thinking about making a photo-plotter attachment for my 
router /
> > > mill.
> > > Do any of you know of a small UV light source that would be 
suitable?
> 
> 
> Owing a Bungard CNC, I'm also interested.
> Visit Maplin UK at www.maplin.co.uk, looking for N76AJ, 'High Power 
UV LED 
> Narrow Directivity' or N75AJ 'Wide.....
> Cristian
> 
> [Non-text portions of this message have been removed]