Electronics Forum | Mon Mar 17 18:37:59 EDT 2008 | aqueous
We manufacture both bulk and localized ionic contamination testers. My answer is from the perspective of the cleanliness testing method. The issue with all bulk ionic contamination testers (Ionagraph, Omegameter, Zero-Ion), is that they test the en
Electronics Forum | Mon Mar 17 04:31:52 EDT 2008 | d0min0
Hello, tried searching the SMTnet archives, but not yet a clear answer - maybe there is not a one yet ? ;) last discussion I found is few years old so maybe there is a fresh view on that? Q: we want to prove that our proces is "clean" we use SAC30
Electronics Forum | Fri Apr 15 09:56:17 EDT 2022 | winston_one
Thank's Dennis. I'm also now think in this direction. Process was adjusted and soldering are good. But one from five boards can have this effect with bubbles and strange uneven distribution of solder inside the barrel. Probably copper is too thin and
Electronics Forum | Thu Apr 14 14:00:44 EDT 2022 | winston_one
Also at few boards we see excessive voiding, extremily excessive. During solderind some bubbling can be observed near the soldering point. Boards was dried before assembly. May be we have a problem with too thin metallisation - that's why poor adhesi
Electronics Forum | Thu Dec 06 12:37:14 EST 2012 | deanm
We are having difficulty with bridging on a 2x50 pin 0.050" fine pitch connector using our selective soldering machine. It usually bridges at the end of the row, but sometimes it bridges all the pins together as it drags across (solid bridging). I
Electronics Forum | Sat Jun 24 07:23:06 EDT 2017 | tch
You will need to preheat the boards for a lead free selective solder process. A preheat module is critical for any wave or selective solder process, if you don't get the board preheated properly the solder is going to resist flowing to the top of the
Electronics Forum | Thu Dec 21 15:35:21 EST 2017 | emeto
For me it looks like a scheduling issue. You can do time studies on your assemblies and predict the best workload, based on scheduling the jobs in the right sequence. Also it sounds like you have only one operator. Train more people to operate will h
Electronics Forum | Mon Jul 22 14:01:31 EDT 2013 | jax
HMP can mean a lot of things, although it is normally used as the generic name for one of the following alloys: Pb93.5 Ag1.5 Sn5 (296°C-301°C) Pb95 Sn5 (308°C-312°C) Pb97.5 Ag1.5 Sn1 (309°C) If you are talking abou
Electronics Forum | Sat Jul 25 18:35:33 EDT 2015 | orbitcoms
I am looking for information regarding setting up an SMT assembly line. I have recently purchased a stencil paste printer, pick and place, and reflow oven. The main information I need is the paste selection and best finish material on the PCBs. I wil
Electronics Forum | Fri Apr 23 07:58:21 EDT 1999 | Vinesh Gandhi
We are an assembly house engaged in large volume manufacturing of Computer motherboards and others. We are in the process of selection of a new wave soldering machine. Can somebody help me inform what are the different parameters which must be ensur
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