Electronics Forum | Thu Apr 04 09:45:58 EDT 2019 | davef
That's what I guessed. Some ideas to consider are: Reduce usage of flux to the bare minimum. Choose a low solids flux Flux residues can be categorized as soft, brittle, sticky but this depends mostly on the formulation of the flux and the resins
Electronics Forum | Wed Dec 04 12:42:04 EST 2019 | dunks
We currently use Kester's ep256 as well and it seems to be a bit more grainy than one would expect from lead, especially if the temperature is too low. That paste says it's specialty is being robust over a wide range of profiles and stencil conditio
Electronics Forum | Thu Jun 24 22:22:06 EDT 1999 | Dave F
Problems with downloading papers from the library not withstanding, downloading other papers in the library is problematic, as follows: Understanding SP440 Heating & Vacuum Functions Credit/ Source: LEO HUERTA, TECHNICAL SERVICES ENGINEER Works fi
Electronics Forum | Thu Sep 17 12:10:57 EDT 1998 | Steve Gregory
| | Hi Folks, | | Need to draw upon the vast expertise in this forum... | | Whenever you fill a new wave solder machine with fresh bar solder, it seems to produce more than the normal amount of dross for a few weeks. I always understood this to be t
Electronics Forum | Fri Sep 18 09:58:27 EDT 1998 | Chrys
| | | | Hi Folks, | | | Need to draw upon the vast expertise in this forum... | | | Whenever you fill a new wave solder machine with fresh bar solder, it seems to produce more than the normal amount of dross for a few weeks. I always understood thi
Electronics Forum | Thu Oct 26 08:59:56 EDT 2000 | Antonio A. Medina
Ok guys, I need help. Here's the deal. We're getting micro solder balls under discreets on the bottomside of the board. Here's my set up... MPM screener w/vacuum plate 6 mil metal screen with 90% circular (rounded) apertures 7 mil (measured) past
Electronics Forum | Mon Jun 18 17:41:07 EDT 2001 | genny
Hi, I put this on the technet forum, and I know some of the same people are here, but I thought I might catch others here as well. We have PCB's which are populated at the CM level with no-clean solder paste. However in house we use a solder wire s
Electronics Forum | Tue Dec 28 10:57:53 EST 1999 | Amy Castor
I have tried the water soluble flux and the aqueous cleaners but I got the same results you did; horrible corrosion and a white flaky mess. I know exactly what you're talking about. We do a lot of hand soldering around here, and the magical solutio
Electronics Forum | Mon Dec 13 21:11:53 EST 1999 | Curtis T.
Steve, I have done countless board profiling and oven reflow profiles. Here are the critical factors on you need to address. What is your board surface finish, if it is something like an OSP it will need a good amount of an active (aqueous) flux to
Electronics Forum | Tue Oct 12 04:33:15 EDT 1999 | Brian
| | | We have three buckets filled with leftover solder paste from our screen printing process. Kester has informed me that they no longer take paste, but only dross and pot dumpings. Does anyone know if there's someplace I can recycle this, or am
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