Electronics Forum | Wed Sep 21 14:43:50 EDT 2011 | russw
The confusing thing is we are doing the same thing we've been doing for years, same flux levels, same procedures, etc. so you would expect the same results. The only difference is the new bottle of 951, but Kester insists there isn't a problem with
Electronics Forum | Wed Sep 03 20:10:18 EDT 2008 | vladig
Nope. I'd be happy to do the analysis for free just to prove the point. Regards, Vlad
Electronics Forum | Fri Jun 15 12:12:34 EDT 2007 | realchunks
Hi Ed, It all depends on more info needed. How many preheaers do you have in your wave? One, two, three? Are you talking bottom side preheat? What size boards do you run and what type of parts are on it. Typically, preheat does several things; w
Electronics Forum | Tue Jan 13 10:25:29 EST 2004 | James
Do you have a different reel of parts. The leads could be oxidized from age. If everything else is soldering well, I would try that. Is your profile on your oven correct?
Electronics Forum | Mon Jul 29 13:48:20 EDT 2013 | cyber_wolf
We have placed millions of DPAKS on our Mydatas without issues. Usually the crosshairs need to be just slightly to the right of the dimple when trimming. We do not use high centering force. Please tell us exactly what the error message is.
Electronics Forum | Wed Nov 07 09:19:16 EST 2007 | pjc
Could be not enough peak temp. Do you have a profiler? I'd measure at the BGA joints- drill under board to get access to BGA solder joints and embed a couple of thermocouples with hi-temp solder, then run your profile to see max. temps. and that prof
Electronics Forum | Mon Aug 25 17:39:45 EDT 2008 | gdzuber
Hello, Maybe you can get closer to a solution by posting a profile. Your problem points are right where your photos show them. So, do a profile at the same points. Also, contact your flux provider and request a recommended profile using their flu
Electronics Forum | Thu Aug 28 21:43:23 EDT 2008 | davef
Couple of points: * We'll tell ya, although it's tough to tell from these pix, but it does not look like dewetting. It looks like nonwetting. * We don't think you're getting this product hot enough. We don't know where you measured the profile you po
Electronics Forum | Sun Oct 19 15:02:10 EDT 2008 | Jdt13
We are having some issues with a RF PCB aprox 1" x 1". The pads are in the bottom of the PCB and it goes on the Top side of the mother board the pads of the RF board are like a BGA (square pads)and we have troubles to make the proper welding in the
Electronics Forum | Mon Aug 25 15:40:58 EDT 2008 | dyoungquist
I am seeing poor quality solder joints, mostly on 0402 components. The problem is that while the pad on the pcb is getting fully wetted, the solder is not flowing up the sides of the 0402 component, i.e. the 0402 lead is somewhat de-wetting. The re
.gif)
