I use two standard small household owens with PID regulators and a fan = each to rotate the air. Quite cheap, and works excellent. Use a long = axis between the prop and the fan motor, as the bearings don't like = excessive heat. The first owen is heated to about 160 degrees, the = second to about 235 degrees. Put the PCB's in owen #1 for 3 minutes to = activate the flux, then move them to owen #2, and wait until the = soldering is completed. It might also be a good idea to put some big blocks of aluminium or = iron, at least in owen #2 as heat accumulators, to improve temp = stability. Regards SM4RAN - Attila ______________________________________________________ Gratis visitkort - klicka h=E4r !=20 Allt inom e-handel! www.torget.se -----Ursprungligt meddelande----- Fr=E5n: Philip Stortz Till: PICLIST@MITVMA.MIT.EDU Datum: den 12 juli 2004 22:33 =C4mne: Re: [EE:] QFP, BGA Soldering >i saw that, though i'm not entirely impressed, i think buying a heating >element a bit larger and building your own enclosure would work better, >notice in the graph that it has a very hard time getting to the higher >temperature and takes too long which will stress components more (and >likely the toaster oven won't last long at that level of heat). what i >wanted was info on building a hot air pen for rework as i'd eventually >like to do that as well and seeing someone else's work is usually a = good >starting point. thanks in any case. > >"John N. Power" wrote: >> >> > From: Philip = Stortz[SMTP:madscientist.at.large@EARTHLINK.NET] >> > Sent: Monday, July 12, 2004 5:58 AM >> > To: PICLIST@MITVMA.MIT.EDU >> > Subject: Re: [EE:] QFP, BGA Soldering >> >> > i'd love a link to the build it yourself hot air soldering tool = page. >> > i've considered making one myself as they seem terribly overpriced. >> > always best to see how other people have done it as a starting = point or >> > to decide if just copying another design is best. thanks. >> >> The current issue of Circuit Cellar (#168, July 2004) has = construction >> information for building a temperature controller which converts a >> conventional infrared toaster oven into "an effective reflow oven" = for >> use with surface mount parts. See pages 32-. >> >> John Power >> >> -- >> http://www.piclist.com hint: The PICList is archived three different >> ways. See http://www.piclist.com/#archives for details. > >-- > proof that >the U.S. media is now state controlled! Ask your' local tv station why >the hell they aren't airing the news any more! Our system of = government >requires an informed public, with their eyes open. > >-- >http://www.piclist.com hint: The PICList is archived three different >ways. See http://www.piclist.com/#archives for details. > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.