Hi LeMar,
I only have the fuser and power supplys left in the LJ II. I stripped everything else off, I just wanted to be able to fuse the toner transfer artwork onto the copperclad instead of ironing it on. I just drive the SI-7300a stepper driver with a ATtiny2313 running a simple C program. That's as far as I have gotten thus far. Next, I plan to build a temperature controller for the fuser, based on the AC power supply from the LJ II. I will use a microprocessor to sense the temperature and turn the triac on and off to maintain a selected temperature in the fuser. Hopefully, this will allow me to fuse the artwork onto the copper by passing it through the LJ fuser. If there is interest, I will post my methods.
I am interested in the direct printing, this is just an experiment to see if I can make this concept work for the .062 boards with toner transfer paper. If the fuser won't fuse the toner onto the copper, direct print won't work with these printers.
Tim
--- In Homebrew_PCBs@yahoogroups.com, "lemar" <doyle51241@...> wrote:
>
>
>
> Apparently you have worked out the timing issues for the HP controller that wants to see paper moving at certain times. I'm curious what you've come up with.
> LeMar
>
> --- In Homebrew_PCBs@yahoogroups.com, "Tim S" <fla.choreman@> wrote:
> >
> > I too would be interested in this. I have a pile of old Laserjet II, III and 4 printers that I could dedicate to this purpose. Right now I've taken a LJII and stripped it down to just the fuser and drive stepper. I'm getting the stepper to run from a microprocessor, I have it running from an arduino, but am going to use a small AVR, probably a ATiny2313. I am planning on controlling the fuser lamp with a micro also, to give me adjustable temperature. Hopefully this will be better than the iron method, my results with that are mixed at best.
> >
> > But my ultimate goal would be to print directly onto the board to cut out the paper printing step.
> >
> > If anyone has any experience, it would be helpful to know what worked and what didn't.
> >
> >
> > Tim
> >
> >
> > --- In Homebrew_PCBs@yahoogroups.com, "lemar" <doyle51241@> wrote:
> > >
> > > Any further activity on this subject?
> > > I'm modifying an HP Laserjet 4+ and am trying to work out the timing issues. Just wondering what others are doing.
> > >
> > > LeMar
> > >
> >
>