Homebrew PCBs

Thanks for the info........

I've got a small lathe and making new bushings from something else is  
something I can do.

Best to ya,
Mike Bauers
Milwaukee, Wi

On Apr 29, 2008, at 7:38 PM, Mark Brueggemann wrote:

>
> --- Matthew Smith <matt@...> wrote:
>
>
>> You want either a magnetic drive pump (polypropylene would
>> probably be a suitable material) or a peristaltic pump
>
> The issue I had with the DynaArt setup was that it used a
> particular size and style of pump, so selection for alternates
> was limited.  The primary failure mode was the bushing bearings.
> They would just disintegrate after a few uses.  Rinsing with
> fresh water didn't help.  I gave up.
>
> The idea I was going to pursue is like photographic developers
> use, where a cylindrical tank is partially filled and rotated
> on a set of rollers.  Experimentation would reveal if more even
> etching would occur if the board was secured or loose in the tank.
>
> Just a rotating variation of a rocking tray, I guess.  Trying to
> get away from pumps, too many issues.