I'll try it in the next week or so and let you know.
Mark
At 06:55 PM 5/14/2010, you wrote:
>The theory is sound, but I believe you're going to have to improve upon the
>alignment accuracy that was originally in the printer to make usable
>double-sided prints...most laser printers I've encountered have variations
>in the printing alignment of well over 2mm from one page to the next. This
>kind of deviation would be imperceptible when printing documents, but
>unusable when trying to align boards.
>
>I suspect you can probably overcome this with some clever timing in your
>MCU. Off the top of my head, running the board though a photointerrupter
>instead of using a mechanical alignment switch would probably improve
>accuracy.
>
>-Andrew
>
>On Thu, May 13, 2010 at 4:04 PM, Mark Lerman <mlerman@...> wrote:
>
> >
> >
> >
> > I have the theory for ds worked out, but I haven't implemented
> > it. The X axis is fixed by the paper guide, but will probably need
> > to be changed to something longer. The Y (motion) axis needs a sensor
> > that tells the mcu when the moving pcb has reached a point
> > approximately where the Paper In Sensor was. It is this sensor that
> > (I think) starts the timing for the actual print. A slot in the
> > carrier with an optical sensor should work fine. The rest is just a
> > tweak in the software.
> >
> > Mark
> >
> >
> > At 02:19 PM 5/13/2010, you wrote:
> > >That sure looks GOOD!!! If my Toner Transfer wasn't working so good
> > >I'd sure be looking at your process - Didn't you say you are still
> > >working on getting double sided to line up?
> > >
> > >Thank you for sharing all your GREAT work.
> > >
> > >Ken H>
> > >
> > >
> > >--- In Homebrew_PCBs@yahoogroups.com <Homebrew_PCBs%40yahoogroups.com>,
> > Mark Lerman <mlerman@...> wrote:
> > > >
> > > > I have posted the final pictures of the process, including a photo of
> > > > the first board run through the converted printer. If anyone is
> > > > pursuing this technique, please let me know how you are doing.
> > > > <http://www.pbase.com/mark10970>
> > > >
> > > > Mark
> > > >
> > >
> > >
> > >
> > >
> > >------------------------------------
> >
> > >
> > >Be sure to visit the group home and check for new Links, Files, and
> > Photos:
> > >http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> > >
> > >
> > >
> >
> >
>
>
>[Non-text portions of this message have been removed]
>
>
>
>------------------------------------
>
>Be sure to visit the group home and check for new Links, Files, and Photos:
>http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>