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On Wed, 7 Jun 2006 15:22:14 -0400, "James Thompson"
<Jamesthompson2002@xxxxxxxxxxx> wrote:
>
>"James Beck" <jim@xxxxxxxxxxxxxxxxxxxxxxx> wrote in message
>news:MPG.1ef0ae26a63c5789989cb2@xxxxxxxxxxxxxxxxxxxxxxxxxxx
>> In article <2464a$4485ebef$438c8034$9639@xxxxxxxxxx>, Jamesthompson2002
>> @hotmail.com says...
>>> I came up with probably an old scheme but simple enough to circulate
>>> etchant
>>> in a pcb tank.
>>>
>>> Start with a plastic soda cap, snip the edges of it to make fins. Then
>>> use
>>> silicone sealant to glue a small magnet inside the cap. Cap sits on
>>> bottom
>>> of tank, then.
>>> Affix another magnet to the shaft of a small dc motor mounted in a
>>> standoff
>>> base for your tank and directly under the cap. As motor spins, so does
>>> cap
>>> and etching solution. Simple enough you think?
>>>
>> I used an aquarium air pump and a bubble wand to keep things moving back
>> in the day.
>>
>> Jim
>>
>Yes, the bubble wand is ok but it also causes a mist to rise from the tank.
>I knew of the chemistry lab stir and it is what I wanted to duplicate for a
>DIY etchant tank stir, to eliminate as much misting of etchant as possible.
>I'm just doing a small tank as of now to see how well it works out. I have
>seen a few post talking about a pump for the etchant tanks and wanted to
>share my approach to it. JTT...
>
I wonder if you could heat the soda cap after cutting it and flatten
the fins while putting a little twist in them to form a crude impeller
to maybe move more liquid.
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