Electronics Forum | Tue Feb 27 11:25:39 EST 2001 | slthomas
Simply trying to answer a management question: "Can we do bottom side w/o capital expenditures?" If we reflow top and bottom we eliminate the need for dispensing and another oven. Do more with nothing, sort of. Of course the cost in loss of through
Electronics Forum | Thu Mar 08 22:17:01 EST 2001 | davef
So much for the experts you asked for, Dreamer. Your project is fairly common. As an expample, there was a thread in the past month or two on SMTnet, where someone was looking for suppliers of "adapters". You should focus on: * Placing the adap
Electronics Forum | Wed Mar 14 18:29:04 EST 2001 | mparker
The basic rule of thumb (info current as of 9/2000, from Ceeris and others) is the 10X multiplier for each major process step. Catching a defect and correcting in SMT will cost $0.10 each. (think about $.04 placement cost, stop line time, operator h
Electronics Forum | Thu Mar 15 03:24:48 EST 2001 | Scott B
We are currently having a conflict of opinion with our QA department regarding the very few occurences we have of chip resistors being soldered upside down (i.e. the resistive element towards the board). IPC-A-610C para 12.3.2 specifies that this co
Electronics Forum | Fri Mar 23 11:58:01 EST 2001 | mparker
You are mixing long exposed paste back into fresh? How long has your fresh jar been open to the air? You are probably doing yourself a disservice by scavenging the paste (it could have moisture entrapped). Your visocity has definitely changed. You a
Electronics Forum | Tue Mar 20 09:31:56 EST 2001 | PeteC
I dunno.: e�lec�tro�lyt�ic Of or relating to electrolysis. Produced by electrolysis. Of or relating to electrolytes. e�lec�trol�y�sis Chemical change, especially decomposition, produced in an electrolyte by an electric current. Destruction
Electronics Forum | Thu Mar 22 14:12:09 EST 2001 | slthomas
Interesting...the very reason we use water soluble paste on some of our boards is for that reason, although I've never been able to get anyone to show me something in print that supports it. It's just what engineering has told me. We currently have
Electronics Forum | Wed Apr 11 13:32:26 EDT 2001 | slthomas
I think we've miscommunicated....I don't use that thing for measuring paste height or volume as part of the process because it's not repeatable from one operator to the next. I use it more to measure radial tape and reel parts against EIA-486, actual
Electronics Forum | Thu Mar 29 12:25:19 EST 2001 | slthomas
All arguments about using OA pastes on high frequency boards to eliminate alledged RF interference aside, is it acceptable to touch up SMT components on these boards with a no clean flux cored wire after wave solder? All of our wave machines are usi
Electronics Forum | Fri Mar 30 20:06:55 EST 2001 | aortiz
Maybe there's no test and I don't know where or why my customer came with that requirement (I think because in one of the board shipments he got a board were a smd resistor broke, but I think that happened because miss handling), but anyway I need so
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