From: "Noname Nospam"
Subject: Re: questions about desoldering system
X-Newsreader: Microsoft Outlook Express 5.00.2314.1300
NNTP-Posting-Date: Tue, 22 Oct 2002 15:43:54 EDT
Organization: Prodigy Internet http://www.prodigy.com
Date: Tue, 22 Oct 2002 19:43:54 GMT
Gary Tait wrote in message news:firstname.lastname@example.org...
> On Tue, 22 Oct 2002 00:47:49 -0400, "Anthony Jons"
> >Just picked up a desoldering station using a vacuum transducer pump.
> >Unfortunately, this means it has to use an air compressor, which I didn't
> >realize when I bought it. The only air compressor I have is a portable 12
> >VDC unit to pump up car tires in an emergency. I tried to use it with the
> >transducer, but the sucking action didn't even begin to remove solder. I
> >then tried to fill a 5 gallon air tank to 120 psi (which burned out the
> >compressor!). With the air still present, I opened the valves, engaged the
> >transducer (by foot pedal) and some solder did remove. Question: Is there
> >any way to make my system work without having to buy an expensive air
> >compressor? I obviously did something wrong here. Another question:
> >Although there was some sucking action, even at 100 psi it wasn't much- what
> >is the working psi of these units?
> >Anthony Johns
> Buy a surplus vacuum pump. make sure you know the strength of the
> pump, and the vacuum requirements of the desoldering unit.
If your desoldering station is like the old Weller (now cooper tools) that
I have, the vacuum venturi is part of the control valve. I replaced this
with a normal air control solenoid and got an old canister vacuum cleaner
from a thrift store.
A vacuum pump may seem like a good idea but remember that you
will be sucking up resin vapor and small flakes of solder. This stuff
causes the carbon rotors in the pump to wear out quickly.