I am sure many other people have had this idea before since I have as of
years ago and one of my reasons for joining this group, but I have not been
able to act on it. Given that you have the Roland Plotter you might be able
to conduct some trials. In any case I believe we really need more practical
ways to do homebrew pcb production, (just my opinion) so this potentially
might be one of them.
-----Original Message-----
From:
Homebrew_PCBs@yahoogroups.com [mailto:
Homebrew_PCBs@yahoogroups.com]
On Behalf Of drsage2007
Sent: Thursday, February 23, 2012 4:44 PM
To:
Homebrew_PCBs@yahoogroups.comSubject: [Homebrew_PCBs] Re: Novel way to expose photo resist??
Hmm. I guess the IR vs UV would be a problem. I've seen some pretty hot blue
LEDS demonstrated. I don't suppose they'd hsve any UV component to the
light. Then there's the speed issue. The plotter cannot be slowed down
(easily). I could use my CNC mill to hold the light source. The Roland plot
commands are easily converted to Gcode. Then I could slow the speed down as
much as required
So; where do I get a UV point source?
Sage
--- In Homebrew_PCBs@yahoogroups.com, Harvey White <madyn@...> wrote:
>
> On Thu, 23 Feb 2012 18:12:03 -0000, you wrote:
>
> >Perhaps you all can comment on whether you think this flash from the past
will work.
> >
> >Back in the day I used to plot PCB's using an old flat bed plotter with
water proof ink in the pen. Getting the pens to work reliably and cleaning
them was always a headache.
> >
> >All this talk about UV resist got me thinking - what if I were to mount a
UV LED (laser diode?)with a lens or whatver it takes to focus a small dot on
a board on the table and put it in the plotters pen hoder. I then coat the
board with UV resist and let the plotter expose it. I might even be able to
use the pre-sensitized boards.
>
> Possible, but....
> >
> >It plots really fast so I'm not sure how much time is required to expose
the resist. But some of the LEDS from CD burners can apparently burn paper
so given that the exposure is an intensity vs. time sort of thing it might
work.
> >The pen-down signal could easily be used to activate the LED and not much
modification would be necessary to the plotter.
> >
>
> CD burners have IR leds, not UV. You'd need a UV diode/laser diode.
> Even then, The exposure is likely too small to affect the board when
> run at any reasonable pen speed.
>
> Harvey
>
> >I have an old Roland DXY800 plotter which for some strange reason is
still supported by Eagle 5.xx so it creates files ready to go to the
plotter.
> >
> >Any comments on if this would work?
> >
> >Sage
> >
> >
> >
> >------------------------------------
> >
> >Be sure to visit the group home and check for new Links, Files, and
Photos:
> >http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> >
> >
> >
>
------------------------------------
Be sure to visit the group home and check for new Links, Files, and Photos:
http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links