mostly practice on a bunch of scrap boards to start..

cleaning is done with the tool(reamer) that looks like a small drill bit --
may have a slight taper to it...

clean with wet sponge just like regular iron -- minimize "on" time since
just a little tip erosion makes the unit useless...

sometime helps to put extra solder on each joint (with normal iron) before
applying the desoldering  tip -- that way the tip has molten solder to
"seal" the nozzle and "suck" better

for pins that are connected to the gnd/voltage plane it sometimes easier to
solderwick the top and bottom side and then break what's left of the solder
joint by "wiggling" the component pin with a small needle nose plier or
pointed scribe...

someone might have a video tape (i've seen some, but they all were pretty
expensive)


-----Original Message-----
From: SM Ling
To: PICLIST@MITVMA.MIT.EDU
Sent: 8/22/02 6:58 PM
Subject: [EE]: Asking for Desoldering gun tips

Ffnally I have to admit I don't really know how to use a vacuum
desoldering
gun properly, but web-searches pop out all kind of product information,
nothing instructive.

Any URL to recommend?  I would want to know what kind of care to give to
the
desoldering tip.  Do I need to tin them?  I tried but solder does not
stick.
And if I don't tin, the heat does not seem to flow to the pin well.  And
how
to desolder on pin that has a huge-heat sink, like those soldered to the
big
ground plane (please assume I cannot cut off the component) ?

Thanks in advance.

Cheers, Ling SM

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