Homebrew PCBs

> -----Message d'origine-----
> De : Homebrew_PCBs@yahoogroups.com 
> [mailto:Homebrew_PCBs@yahoogroups.com] De la part de lcdpublishing
> Envoyé : juillet 12 2006 17:49
> À : Homebrew_PCBs@yahoogroups.com
> Objet : [Homebrew_PCBs] Super bubbler - got it working now!
> 
> 
... So, like all "real men" do, I opted for more power! MUCH MORE POWER!
...
> 
> Chris


You've come to the same conclusion I did several months ago, the fishtank
pump just doesn't cut it.  I connected my shop air compressor to a drilled
PVC tube I had running down the bottom of the etching tank.  I kept on
adding rows of holes until I got the desired 'coverage'.  I used a ball
valve with a nice red handle to control the air flow.

Like you, I knew that one accidental tap on that handle and I'd have a
disaster on my hands.  Don't forget, that bubbling action at the surface
creates a very fine ferric chloride mist.  Just 'cause you don't see it
doesn't mean it's not there, and I didn't have adequate ventilation for a
permanent installation.

I sure did get awesome bubbling action going though, like boiling water, but
not as crazy.  One day when I'm going to have a decent shop space, I will
make another etching tank.  But for the time being, all my equipment fits in
a large plastic bin, way up high on the top shelf (with the acid stored on
the bottom shelf of a cabinet out of harms way).

Now add a section of metal pipe after the air compressor, place a heat
source alongside that pipe and you've added temperature control to the
etching.

Robert
:)