Electronics Forum | Mon Sep 28 19:07:47 EDT 1998 | Steve Gregory
| I have had some field failures returned recently, the boards had flux contamination under the components in a sensitive area, Nothing really visible until the component was removed, and the board had no evidence of rework of any type. Is it poss
Electronics Forum | Thu Apr 30 09:27:58 EDT 2020 | clockwatcher
I currently have a board that has several wires that need to be soldered into it. Many years ago I remember wave soldering power supply boards that also had many wires. In order to keep the wire insulation out of the solder fillet and keep the wires
Electronics Forum | Tue Jan 21 13:51:19 EST 2014 | rgduval
Armando, Is the problem in the same spot on the board with every run? If so, there might be something about that particular location that is part of the cause (ie. ground or power plane connection). It sounds like you're seeing blow holes, or insu
Electronics Forum | Mon Jan 31 12:24:24 EST 2000 | Dave F
Robert: Several points: 1 Dross is a mixture of various things with no "fixed" composition: � The obvious things are metal oxides mixed with metal and this can vary in color with temperature and composition - remember some intermetallic oxides form
Electronics Forum | Tue Dec 04 08:34:07 EST 2007 | davef
We no advice to give you on the topic, but maybe while you're waiting for others to reply, reading a trade journal article on the topic might help. Below is a link to "Pin-in-hole reflow (PIHR) and lead-free solder joints" by David Bernard, Bob Willi
Electronics Forum | Tue Aug 10 15:56:30 EDT 1999 | Jason Gregory
Has anyone ever heard of this? I have a Camalot System 5000 and we were in a pinch to produce some prototype boards. We needed Sn62Pb36Ag2-no clean in a dispensing mesh. All I could get my hands on was some Interflux paste in a jar. The formulation i
Electronics Forum | Tue Oct 16 07:00:06 EDT 2001 | genglish
Hi all, I have a problem and would gratefully take on suggestions, firstly let me explain the situation: We are currently screen printing adhesive, using a method similar to DEKs 'Pump Print', The adhesive we are currently using is supplied from Alp
Electronics Forum | Wed Mar 05 11:00:52 EST 2003 | msivigny
Hello Joseph, I'm sure there is an alternative but I need to have more information in order to make a suggestion. Is the part setup for selective soldering, through-hole for wave or surface mount for reflow? Let me know if you require additional assi
Electronics Forum | Mon Nov 30 10:04:26 EST 1998 | Clint Hardee
Yes, the GEM series feeders are quite different. In fact, if you put CSM feeders on a GEM machine, you will probably break nozzles and crash the head due to the fact that the CSM feeders have a mechanical arm that sticks up toward the front of the bo
Electronics Forum | Tue Dec 16 16:49:22 EST 2008 | scottd3
We ran into this problem before, on all of our models. We never quite found out the reason, we do know that if the PCB is passed through a reflow oven that is extremely dirty with evaporated solder paste flux, it will make it extremely difficult (or
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