Electronics Forum | Wed Oct 03 12:04:55 EDT 2001 | slthomas
When we found this to be a problem with some QFP 100's (.020" pitch, and our first experience with fine pitch - 48 of them on a 2-up panel), we saw that the solder was running up the leads during reflow and staying there, leaving the fillets thin or
Electronics Forum | Tue Oct 09 12:04:37 EDT 2001 | Mike
Has anyone looked at setup reduction for machine feeders. We have made some gains through changing the flow of work but as lot sizes decrease the number of parts required remains the same. We remove all reels from the feeders after a job is complet
Electronics Forum | Tue Oct 30 14:39:41 EST 2001 | markhoch
Has anybody else out there had problems with SMT connectors with plastic locating pins lifting up during the reflow process? We've had several instances with several differant types of SMT connectors lifting up during the reflow process. We've even g
Electronics Forum | Sat Dec 29 06:14:20 EST 2001 | Matt Kehoe
I am looking for a person who can help bring up a Conceptronics reflow oven in the Atlanta Georgia area. The oven is used, but in great shape. Just needs someone who knows how to trouble shoot it. The fans comes on, the bonnet will raise, the compute
Electronics Forum | Mon Dec 31 08:59:36 EST 2001 | Don Adams
The second pass in the wave is pretty extreme and will probably aggravate the conditions which caused warpage in the first place. Areas to look for problems, The lay up of the boards at fabrication or the materials used can lead to warpage. Work wi
Electronics Forum | Thu Jan 31 11:49:21 EST 2002 | MikeF
Does anyone out there have a wave solder troubleshooting chart in electronic form they could e-mail me? I'm about to crank up a wave solder machine here, and the chart I got several jobs ago is missing in action. Also, if anyone remembers using a
Electronics Forum | Fri Feb 22 11:49:42 EST 2002 | stimpman
Hi, Have you checked your placements pre-reflow? The most typical cause of a billboard unlike tombstoning is a pick and place issue. Billboarding will usually happen with ( profile/bad pad layout and the most common just poor center placement. I'v
Electronics Forum | Tue Mar 26 13:31:11 EST 2002 | pteerink
bought a line from an American company once. You couldn't miss it, all the machines were plastered with "Made with Pride in the USA" stickers. Was a great show of nationalism, stickers were nice and shiny too. Too bad the machines didn't work when
Electronics Forum | Fri Mar 29 10:51:20 EST 2002 | lsmith
The IPC-EM-782 reads as follows: the adjustment factor is usually intended to increase the Z dimension slightly, but brings the Z maximum up to an even equivalent. Example if Zmax is 2.100mm then you would enter an adjustment factor of .100mm. The ad
Electronics Forum | Sat Apr 20 01:25:39 EDT 2002 | lysik
It is not just the rgistration fee. It is the fact that often after you register the machine you sre still denied a certian portion of service. UIC is very in check with their registration pricing. OEM's do however have a clause that says we can not
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