Electronics Forum | Thu Jun 20 08:23:19 EDT 2002 | davef
Either you need a stronger flux or the solderable surfaces need to be reconditioned. Most board fabricators don't do reconditioning. Search the fine SMTnet Archives for discussion on ROSA. EMPF is one place that does ROSA on a contract basis.
Electronics Forum | Thu Mar 03 09:29:12 EST 2005 | jdengler
This sounds like you are using a straight ramp profile. For this type of an assembly you may need to use a soak type profile. Most solder paste providers show you both types of profiles that work best with that paste. I would try using that profil
Electronics Forum | Mon Mar 21 21:34:07 EST 2005 | Steve
Don't know of anything really automated, Winslow Automation offers solder spheres on water soluble tape and a company called the Waveroom Plus in NH offers a machine reasonably priced but it is not automated. There are companies out there that offer
Electronics Forum | Mon Jun 06 04:32:05 EDT 2005 | Rob
Yes, Loctite 3880. It works out at about $160 for a tube of 30ml. It can be dispensed or printed. We found you needed a lot less than with solder as it doesn't wick or spread much.
Electronics Forum | Fri Mar 24 13:05:08 EST 2006 | samir
Patrick, I learned at a Lead-Free seminar, where the seminar lecturer was a proponent of Bismuth in soldering, that Bismuth is actually "safe to eat" and is one of the few non-toxic metals around.
Electronics Forum | Fri Oct 10 09:34:58 EDT 2008 | dwelch123
We use a Marantz ISpector and as long as you program it correctly, taking into consideration any shadowing from adjacent parts, it does a superb job catching non-solders, head in pillow and insufficients.
Electronics Forum | Fri Aug 28 05:22:47 EDT 2009 | sachu_70
Would suggest you have a re-look at your reflow profile. There could possibly be a higher thermal demand to solder the Pb-free version of these screw terminals considering that external plating has changed.
Electronics Forum | Mon Aug 30 09:17:28 EDT 2010 | sreid
Yes we have a set Hot-Tweezers. I should have stated above that all of the resistors have been removed already and the new parts are being soldered on. I was just looking for a quicker method of rework. But thanks for the ideas.
Electronics Forum | Mon Feb 28 22:53:48 EST 2011 | Jacki
Hi Bruce It will be using a hot air knife for solder. Meanwhile, there are many bridging at fine pitch socket pin after wave. It isn't easy to tuoch up. So, consider the air knife can help a bit. Thanks
Electronics Forum | Thu Jan 11 09:19:56 EST 2007 | SMTRework
I know this is not the correct forum to post chip "reworking" questions but you guys have been very helpful in the past. My question is this, when we rework BGA components most of the time the solder reflows at a normal temp and all is well. On occ
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