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:
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>
>
>