Electronics Forum | Mon Dec 02 12:52:40 EST 2002 | slthomas
We're trying a selective soldering pallet for the first time with mixed reviews. Are solder balls a prevalent problem with this process? Most of them seem to correspond with pallet wall locations....is it too much turbulence from the rotary chip wav
Electronics Forum | Tue Dec 03 18:31:45 EST 2002 | slthomas
At the price of Durapol we'd never get the OK to have them made. The Al fixtures are cheap and a quick turn local item. As dense as the pth parts are I also don't think there'd be any room for any holes which I really think is the answer as far a
Electronics Forum | Thu Dec 05 11:04:27 EST 2002 | slthomas
They're IR, bottom side only. Frankly wave solder is not my forte (there are those that would claim nothing is), but I've personally been tasked with developing a process to do reliable, high volume bottom side SMT, so I'm drawing a lot from the tec
Electronics Forum | Mon Dec 16 16:35:55 EST 2002 | Jim Ferris
Randy, Steve & all, Can you guys point me in the right direction when it come to using selective wave soldering...I am trying to get in-depth information on the Pro's & Con's of having our supplier use this process for our PWA's. (I can see there ar
Electronics Forum | Wed Dec 04 21:39:53 EST 2002 | davef
As you say, some BIG time force has pulled the metalization from the bottom of the component termination. From the pix it's hard to say whether it was caused by either: * Mechanical flexure of the board during an unusual heating or other processing
Electronics Forum | Thu Dec 12 09:21:42 EST 2002 | blnorman
What we did: *Slump-dot diameter and height as a function of time *Print Speed-Vary speed, measure slump and missing/defects *Green Strength-We quantifiably measured tack vs time and we placed components and measure skew by SVS *Cure profile sensitiv
Electronics Forum | Wed May 12 10:15:29 EDT 2004 | gabriele
Hi Dave, I've got it, many thanks. Snow ? My village is located latitude GMT + 1 hour,and about 45� north longitude. 30 Km north the mountains are still fully covered by snow. Sea is about 3 hrs driving down. My Job?, EMS'engineer (ex)
Electronics Forum | Sun Dec 08 22:20:39 EST 2002 | grantp
Hi, We have been manufacturing a PCB, however it's been quite tricky to profile, as the edges of the PCB are reflowing before the center of the PCB. I have looked at the design, and there is a small power plane for 2.5 Volt in the center of the PCB
Electronics Forum | Mon Dec 16 10:05:29 EST 2002 | Grant Petty
Hi, Thanks for the info. We are reflowing the boards, but just barely. Sometimes we get the QFP in the middle of the copper area not reflowing, and it's pain. The joints are dry, and I am not sure if it's caused by lack of heat, or the flux going ba
Electronics Forum | Mon Dec 09 18:57:08 EST 2002 | MikeF
Several places I've worked did not allow radios/players of any kind, with or without headphones. The one place that did had a policy that I thought was pretty good - Operators had to be there at least 6 months before they could wear one (that way th
