Electronics Forum | Mon Jun 12 14:03:12 EDT 2000 | MikeF
Jason, First, check with the manufacturer of the flux you are using. They can tell you what board topside temperature range the flux is designed for. Some other info is needed for the residue part. Is it showing up on the same board, or different boa
Electronics Forum | Tue Jun 13 12:03:10 EDT 2000 | Chris May
Jason, If 225C is the topside temp of your board just prior to hitting the wave, I would say this is too high. Your flux suppliers data sheet should tell you an ideal topside temp for good flux activation, probably around 190C. According to the Bi
Electronics Forum | Thu Jul 27 12:54:53 EDT 2000 | John Thorup
Hi Jason I think Wolfgang has this one nailed. If it's the same four pins every time and nothing changes this, even rotating the board 90 degrees, then you're probably going to find something like a ground plane connected to them. I don't think sol
Electronics Forum | Sat Jul 29 00:44:30 EDT 2000 | Jason
Thanks for all the ideas. I tried solder "thieves" by placing some desoldering wick behind the briging pins and it worked! I have yet to try Chrys' idea but I will first thing Monday. This is a new board that has had this problem from day one. I
Electronics Forum | Tue Jun 06 14:31:42 EDT 2000 | Jeff Sanchez
I have 25#'s of bismuth in my shop. I wanted to add some to my 63/37 till it was eutectic. This would allow me to lower the waves temp. Can I do this and still meet standards? Also would it make the solder joints to brittle and would discoloration be
Electronics Forum | Wed Aug 09 09:25:57 EDT 2006 | Mike F
Am I missing something here? I usually put some type of stiffener or support on the leading edge to make sure the PWB doesn't sag in the middle from the preheat. If I had to add a bean bag with shotgun pellets or BB's I would have boards falling out
Electronics Forum | Thu Nov 17 03:34:51 EST 2005 | cangly
Hi, We have a board with over 100 chips (mixed size) and some long Connector DIP through out Wave solder with many issues of no solder and solder bridge, (using clean flux with bubble fluxer and Kester solder bar). Currently we tried to reduce the de
Electronics Forum | Thu Nov 17 13:13:49 EST 2005 | Mike
Hello, Some questions.... Are you running lead free? What alloy? What�s your pot temp at? Temp of the board after preheat? Are you getting any solder in the barrels (
Electronics Forum | Thu Nov 17 20:23:14 EST 2005 | cangly
Hi Russ, We control the gravity of flux each 8 hours and will mix thinner to balance it if any.. Do we need more any action for this.. Thanks for your advices.
Electronics Forum | Fri Nov 18 08:31:09 EST 2005 | jdengler
This is way too long of a time. The SG probably changes significantly over this time. This could be a major contributor to your problems. Jerry
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