Electronics Forum | Mon Apr 14 20:13:40 EDT 2014 | davef
So, someone is going to get a chance to buy a nice and shiny oven, eh? Summary from my notes of old thread on SMTnet: Some people melt sugar and use that solution to clean cooked-on flux residue. Dissolve sugar into warm water, spray it on the area t
Electronics Forum | Mon Oct 13 08:43:56 EDT 2014 | rob
Hi Larry, Picture a old lady with a set of knitting needles with leads attached to them, pressing the needles into different points of the PCB (pads, test points or component leads) and measuring resistance, inductance, waveforms etc between these p
Electronics Forum | Thu Jun 15 06:58:54 EDT 2017 | cyber_wolf
Hmmm.... When I clean my stencils after I run a job, it is to clean the paste off the stencil so it doesn't dry out in the apertures and on the stencil surface while it is being stored. Wiping the stencils during production is to clear the paste of
Electronics Forum | Tue Dec 17 14:11:43 EST 2019 | kylehunter
Haven't run those boards again, so haven't had the issue.. Since it seems like we may want to start using more aggressive flux based paste soon, what are some good choices? Ideally I'd like to stay with Kester, since they are readily available. EP2
Electronics Forum | Tue Feb 07 11:55:27 EST 2023 | tommy_magyar
What I would look at is the chemicals being used in the facility where the complaints are. Flux/flux gel, IPA, cleaning agents, etc. Perhaps you should limit the usage to certain people only, who would be trained how to properly use these. Something
Electronics Forum | Wed Feb 23 16:49:08 EST 2000 | Dave F
John we paced through the same question recently. Both automatic dispensers and printers can be used to deposit SMT adhesive or solder paste on substrates with a relatively high component density. Dispensers are superior to printers in terms of exa
Electronics Forum | Fri Dec 01 17:03:57 EST 2000 | Dave F
Curious, very curious ... Residues � Where are these residues? [solder & laminate / mask, solder only, laminate / mask only] What is the result of your analysis to the residues? How do you know it�s a flux residue, rather than a chemical by product
Electronics Forum | Tue Nov 07 11:51:06 EST 2000 | SPD
Hello John, Some determining criteria. 1. Examine what you are cleaning. Pastes, epoxies, inks, etc. Get the MSDS and samples ready and be prepared to forward them to the manufacturers for testing. They can respond with appropriate system and c
Electronics Forum | Wed Feb 23 16:49:08 EST 2000 | Dave F
John we paced through the same question recently. Both automatic dispensers and printers can be used to deposit SMT adhesive or solder paste on substrates with a relatively high component density. Dispensers are superior to printers in terms of exa
Electronics Forum | Thu Oct 21 09:56:11 EDT 1999 | Brian
Rich An excellent question and one which is often totally ignored. If you wish a "no-clean" flux to be as safe as it possibly can be, the PCB and the components must all be contamination free (ionic and non-ionic). Only then can you be sure that the
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