[sdiy] Looking for Advice in spending a few hundred dollars ondesoldering technologies.

[nicolas]

I think desoldering requirements come in several different flavours, but I have never yet seen any need for expensive or specialised equipment.  If you want to carefully remove a chip or two without damaging anything, the braid and cheap spring-loaded sucky things do the job fine as long as you have some patience.  If the board is what you care about, but the components you are removing are dead, cutting their legs first (or even dremeling their bodies) makes the job much easier and quicker and you are less likely to overheat the board.  

If you want to quickly depopulate a whole board to harvest the components and aren't too fussy about maybe damaging the board, the flamethrower approach is best.  Use a small gas cooker or blowtorch to get large areas of the solder molten, then whack the board hard on the edge of the bench and you can instantly desolder everything.  Good idea to wear glasses as the molten solder can really fly around if you get vigorous with it.  Components still holding on after that can be easily extracted with pliers pulling from the component side while holding the solder side of the board over the gas flame.

Cheers,
Nicolas



--- On Mon, 1/6/09, David G. Dixon <dixon at interchange.ubc.ca> wrote:

> From: David G. Dixon <dixon at interchange.ubc.ca>
> Subject: RE: [sdiy] Looking for Advice in spending a few hundred dollars ondesoldering technologies.
> To: "'Loscha'" <loscha at gmail.com>, "'synth diy'" <synth-diy at dropmix.xs4all.nl>
> Received: Monday, 1 June, 2009, 4:29 AM
> Loscha,
> 
> I use a $15 Chinese plastic plung-o-matic solder
> sucker.  In addition to the
> occasional boo-boo, I've depopulated several very dense
> boards with it, and
> it works like a charm.  The only caveat is that you
> have to plunge it
> (preferably over a rubbish bin) every time you plunge, but
> once you get into
> the rhythm of it, you can suck about 10 pads per minute.
> 
> If you have a fetish about spending money on fancy
> doo-dads, then by all
> means fork over $200+ for the gun, but if you just want to
> suck solder off
> of pads to recover parts, the plastic plung-o-matic is
> really all you need.
> 
> Cheers,
> Dave
> 
> David G. Dixon
> Professor
> Department of Materials Engineering
> University of British Columbia
> 309-6350 Stores Road
> Vancouver, B.C. V6T 1Z4
> Canada
>  
> Tel 1-604-822-3679
> Fax 1-604-822-3619
>  
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> > -----Original Message-----
> > From: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-
> > bounces at dropmix.xs4all.nl]
> On Behalf Of Loscha
> > Sent: Saturday, May 30, 2009 10:45 PM
> > To: synth diy
> > Subject: [sdiy] Looking for Advice in spending a few
> hundred dollars
> > ondesoldering technologies.
> > 
> > http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=200340544449
> > 
> >  Has anyone had experience with this Seller's
> item? It's "Virtual
> > Village". I've gotten an EPROM eraser, some cables, a
> few other bits
> > and bobs from them, and they've been fine.
> > Item is a gun type soldering sucker; About $175au
> delivered.
> > 
> > =My budget for a desoldering gun doesn't extend to new
> at this point in
> > time.
> > =I don't desperately need one right away, so can wait
> to amass more funds.
> > =I almost exclusively do through hole work, and want
> to be able to
> > remove solder so I can change components, not just
> clear off the board
> > to harvest. So I don't think a hot air blower is what
> I need, but,
> > I've never used one.
> > =Prefer Pistol/Gun type to be able to put into case
> and bundle into
> > backpack to take over to Bill's house.
> > =I don't plan to go into commercial parts harvesting.
> I wouldn't be
> > using it for hundreds of germanium diodes from old
> PCBs or anything
> > (well, just 100 diodes or so, actually, but, I figure
> that's a good
> > test of it's functionality, and some old Logic ICs
> from some junk
> > PCBs)
> > =Do I go this sort of route, or wait a few weeks until
> I can afford
> > Hakko or Den-On?
> > =Looking to avoid false economy.
> > 
> >  Any input welcome, thanks.
> > _______________________________________________
> > Synth-diy mailing list
> > Synth-diy at dropmix.xs4all.nl
> > http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> 
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