I just squirt solder flux out of the syringe on all the pins, turn up the
air gun to high and shoot hot air from the top and pick the part up with
tweezers 20secs or so later. Hot air heats all the pads up at once. Solder
flux isolates the area affected by the hot air. It's really simple and a
hot air gun is around $100.
A lot of smd parts have pads underneath such as thermal pads and qfn chips
and these are also no problem with a hot air gun.
Henry
On Thu, Jul 7, 2011 at 6:45 PM, Donald H Locker <dhlocker@...>wrote:
> ∗∗
>
>
> I "recently" removed a 144-pin LQFP with XActo knife, iron and braid. If
> you have pics or a video of removing such a critter with iron and hot air in
> 20 sec, I'd live to see it. I spend the better part of 15 minutes on that
> part.
>
> Donald.
> --
> ∗Plain Text∗ email -- it's an accessibility issue
> () no proprietary attachments; no html mail
> /\ ascii ribbon campaign - <www.asciiribbon.org>
>
>
> ----- Original Message -----
> > From: "Henry Liu" <henryjliu@...>
> > To: "Homebrew PCBs" <Homebrew_PCBs@yahoogroups.com>
> > Sent: Thursday, July 7, 2011 8:38:54 PM
> > Subject: Re: [Homebrew_PCBs] Re: Removing SMDs
> > Hot air gun/soldering station combo is around $100 new off ebay and is
> > probably the best solution.
> >
> > Using hot air and flux in syringe I can remove most SMD components
> > including 200 pin qpfs in 20sec or less.
> >
> > Low melt solder is ok except it's still easier to use the hot air
> > which has no cleanup.
> >
> > Henry
> >
> > On Thu, Jul 7, 2011 at 1:27 PM, Mark Mickelsen <msmickelsen@...>
> > wrote:
> > > Could you please post a link to the picture of the "forked soldering
> > > iron
> > > tip". I looked on site, but didn't see anything with the name
> > > "Andrew" or
> > > any cover pictures that looked like it. I'm probably blind, but I'd
> > > like to
> > > see the pictures.
> > > Thanks,
> > > Mark
> > >
> > > On Thu, Jul 7, 2011 at 8:24 AM, Andrew <a_wake@...> wrote:
> > >
> > >> ∗∗
> > >>
> > >>
> > >> Two or three months ago I posted a picture of a "forked" soldering
> > >> iron tip
> > >> that I made -- I was asking if I had come up with something new, or
> > >> merely
> > >> re-invented the wheel. Not surprisingly, it was the latter ... but
> > >> all the
> > >> same, it is a GREAT tool for removing SMD devices. The only
> > >> downside is that
> > >> it is made to fit one particular profile. Since I have the copper
> > >> and the
> > >> machine shop, I'll probably eventually make a few other profiles to
> > >> fit the
> > >> other SMD components that I tend to use.
> > >>
> > >>
> > >> --- In Homebrew_PCBs@yahoogroups.com, "Peter Leybourne"
> > >> <peter.ley08@...>
> > >> wrote:
> > >> >
> > >> > Somebody may have mentioned this.....
> > >> > I saw somewhere an article with a soldering iron 'tip' extension
> > >> > made in
> > >> the
> > >> > shape of a two pronged fork. Several extensions were made as
> > >> > needed for
> > >> > different size/shape components.
> > >> >
> > >> > Peter
> > >> > MM5PSL
> > >> >
> > >>
> > >>
> > >>
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> > >
> > >
> > > ------------------------------------
> > >
> > > Be sure to visit the group home and check for new Links, Files, and
> > > Photos:
> > > http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> > >
> > >
> > >
> > >
> >
> >
> > ------------------------------------
> >
> > Be sure to visit the group home and check for new Links, Files, and
> > Photos:
> > http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> >
> >
> >
>
>
>
[Non-text portions of this message have been removed]