Homebrew PCBs

Tim,

See the files section for this group. Pictures are at 
<http://www.pbase.com/mark10970>. Note however, that there are much 
simpler mods that others have done - search the archives of this 
group for DLP and Direct Laser Printing.

Mark


At 02:52 PM 10/28/2010, you wrote:

>Mark,
>
>The exercise to convert the old LJII to a toner fuser is an 
>intermediate step for me. I can print the artwork on photopaper and 
>get good boards, but the ironing of the artwork onto the copperclad 
>is the most variable and error prone part for me. So I decided to 
>make the LJ fuser to add some consistency to the process. I know 
>that others have done this with laminators, but I have a pile of old 
>LJ II and III printers lying around, so that's what I'm using. If 
>this works out, it will be a big step forward in the paper toner 
>transfer method for me and allow me to get some boards made.
>
>That being said, I'm very interested in the direct transfer method, 
>it obviously would be better than the paper process.
>
>It sounds like you have some experience with this process, could you 
>share some information or links on how to implement it, if possible 
>with the older LJ III printers? Is the 600dpi enough for 10 mil 
>lines and spaces? I've Googled it but found little information.
>
>I just jumped into making my own PCBs with the toner transfer method 
>and am a newb at it. So any direction you can provide will be 
>greatly appreciated.
>
>Tim
>
>--- In Homebrew_PCBs@yahoogroups.com, Mark Lerman <mlerman@...> wrote:
> >
> >
> > And, if I might reply to my own reply, a printing run takes a second
> > or two, and if you don't like it you can wipe the board with a paper
> > towel and run it through again.
> >
> >
> >
> > At 04:21 PM 10/26/2010, you wrote:
> > >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
> > >
> > >
> > >
> >
>
>
>
>
>------------------------------------
>
>Be sure to visit the group home and check for new Links, Files, and Photos:
>http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>