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2014-04-20 by Rob Frohne
Greetings, I'm wondering if anyone has done any more work on direct laser printing. I would like to improve our process, because sometimes, especially on bigger boards, the print is spotty (the toner doesn't stick everywhere it should) on the board. Thanks, Rob -- Rob Frohne, PhD, PE Professor EF Cross School of Engineering Walla Walla University 100 SW 4th Street College Place, WA 99324 (509) 527-2075
2014-04-20 by Jean-Paul Louis
Rob, Do you mean Direct Laser Printing on a copper plate (conductive) like a PCB? I though the laser printing needed an insulator to deposit toner on. I might be wrong though. Jean-Paul AC9GH On Apr 20, 2014, at 2:12 PM, Rob Frohne <rob.frohne@...> wrote: > Greetings, > > I'm wondering if anyone has done any more work on direct laser > printing. I would like to improve our process, because sometimes, > especially on bigger boards, the print is spotty (the toner doesn't > stick everywhere it should) on the board. > > Thanks, > > Rob > > -- > Rob Frohne, PhD, PE > Professor > EF Cross School of Engineering > Walla Walla University > 100 SW 4th Street > College Place, WA 99324 > (509) 527-2075 > > > [Non-text portions of this message have been removed]
2014-04-21 by Mark Lerman
The thing that seems to work best is disconnecting the transfer voltage from the transfer roller and then grounding the surface of the pcb. This can be done with a thin wire or conductive copper tape (make sure it has conductive adhesive) from the pcb to the carrier, then a thin wire from the carrier to ground. Have you tried that? Mark At 02:12 PM 4/20/2014, you wrote:
>Greetings, > >I'm wondering if anyone has done any more work on direct laser >printing. I would like to improve our process, because sometimes, >especially on bigger boards, the print is spotty (the toner doesn't >stick everywhere it should) on the board. > >Thanks, > >Rob > >-- >Rob Frohne, PhD, PE >Professor >EF Cross School of Engineering >Walla Walla University >100 SW 4th Street >College Place, WA 99324 >(509) 527-2075 > > > >------------------------------------ > >Be sure to visit the group home and check for new Links, Files, and Photos: >http://groups.yahoo.com/group/Homebrew_PCBsYahoo Groups Links > > >
2014-04-21 by <cs6061@...>
2014-04-21 by <indigo_red@...>
2014-04-22 by Mark Lerman
Hi Mark,
Very interesting!!! I 'll try that too. Gnd the pcb etc.
Also wipe down the PCB with acetone and let
dry( ~ a minute or less ) prior to running it in the printer.
-Lee Studley
2014-04-23 by <indigo_red@...>