Dave Kush is using a glass baking dish with glass marbles to hold the
board above the spinning magnet.
Link from my conference to Dave's page
http://buildyouridea.com/hardware/modus/phase_5/phase_5.html --- In Homebrew_PCBs@yahoogroups.com, JanRwl@A... wrote:
>
>
> In a message dated 12/23/2005 8:35:42 A.M. Central Standard Time,
> lcdpublishing@y... writes:
>
> Just a thought on this subject, perhpas there is something there
> that is useful
>
>
> Sadly, there is a "thing" in there that makes the liquid spin,
usually a
> magnet in a fuzed-shut glass tube or a molded over (teflon?) jacket,
etc.
> Would NOT be useful around a vertical, flat, being-etched PCB.
>
> Too bad the etchants are such nasty liquids, as the best way would
be a pump
> that sprays from many tiny holes in a straight line, so the liquid
would
> rinse down both faces of the board, being continuously mixed until
depleted, so
> always the same etch-rate, all over, until done. But
selection/paying-for a
> pump that will handle the nasties with acceptably-little
maintenance is SUCH
> a drag! The bubbling idea is second-best, but getting the holes in
the
> "pipe" and air-pressure just right for consistently-sized and/or ideal
> quantities/second bubbles is SUCH a variable hassle!
>
> Centrifuge. JRR
>
>
> [Non-text portions of this message have been removed]
>