Lemar,
What I do is connect the printer sensors to a $29 USD Dataq data
logger and measure the timing that the printer expects. I can then
emulate it with a little microcontroller. There are other ways,
depending on the printer, that use the sensors (mostly) as is. The
logger lets you see exactly what the printer needs to see, so it
really simplifies experimentation.
Mark
At 05:50 PM 10/26/2010, you wrote:
>Mark:
>The Laserjet 4+ that I'm modifying looks like it could be a good
>candidate for this project as it appears fairly robust. My problem
>at this point is that the controller wants to see paper moving (or
>not moving) at the right time or it stops the process and gives a
>paper jam message.
>I think if I can get the timing right the rest may be easier. Comments?
>
>LeMar
>
>
> >
> > Toner transfers directly to pcb stock very easily, and very fine
> > traces can be achieved. The problems are more mechanical than
> > electrostatic. I, and several other people on this list have done
> > this over and over, using a variety of printers and mods. It's also
> > much easier to implement than either toner transfer or inkjet printing.
> >
> > Mark
> >
> >
> > At 12:55 PM 10/26/2010, you wrote:
> > >Tim,
> > >Before worrying about the fuser, can you accurately transfer the toner to
> > >the PCB?
> > >I expect that to be the big problem to overcome.
> > >Bertho
> > >==========================================================
> > >From: Tim S Sent: Tuesday, October 26, 2010 11:46
> > >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
> > >
> > >
> > >
> > >
> > >
> > >------------------------------------
> > >
> > >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
>
>
>