Electronics Forum | Thu Sep 26 13:35:28 EDT 2002 | jersbo
Thanks to everyone who posted! I did get the boards clean and it worked well I used AIMTERGE 520A about 5% in HOT water.. I soaked for 10 minutes used a brush(handscrubber type)to loosen the residue. For the fine pitch I used a fine bristled small
Electronics Forum | Tue Sep 24 14:29:32 EDT 2002 | stepheno
We have a board with 16 SMT connectors, side by side. We get some unsoldered pins on the connectors. There is about a half inch gap between them. The enigeer in charge of the project said it would cost too much to make something and didn't think it
Electronics Forum | Mon Sep 23 17:04:37 EDT 2002 | bdoyle
I'm all for simplcity. Creating special cases or multiple levels of archival seems too problematic to me. I'd be in favor of a cutoff date that threads just get "locked" after (whatever time that may be). Otherwise we stick to the current method w
Electronics Forum | Tue Sep 24 12:58:27 EDT 2002 | dragonslayr
Although focusing on solderability may be the right answer, I wonder if you are satisfied that co-planarity is not the root cause. With random events of contact opens, this may be the case. Cleanliness of the stencil can also be a source of your pr
Electronics Forum | Tue Sep 24 10:55:50 EDT 2002 | bdoyle
Sorry about starting multiple threads about this but I'm trying to keep thoughts together. Anyhow there's a thread up right now that is a good example of an old thread that is still good: http://www.smtnet.com/Forums/index.cfm?fuseaction=view_threa
Electronics Forum | Tue Oct 01 16:33:33 EDT 2002 | slthomas
I know, I know. It's not a "solution", per se, because it's a bandaid for bad fabrication, packaging, and storage practices. Still, it's a reality with our overseas CM that has a plant in a very humid environment. Is 16 hours @ 105C the safe way to
Electronics Forum | Wed Oct 16 11:51:03 EDT 2002 | Brian W.
Pink Lady refers to solder stop, or temporary solder mask. There are a couple of types. Peelable, which you must peel off after processing, before wash, and of course before you ship. There is also a water soluble version, which dissolves in the w
Electronics Forum | Thu Nov 14 17:57:34 EST 2002 | jonfox
Even though I don't use them, the 3 Topaz Xi's. On larger runs, you could split the workload across all three at one time or run three different jobs(assumming feeder requirements) on the three machines. Even though you could possibly achieve highe
Electronics Forum | Mon Oct 21 11:49:20 EDT 2002 | sueph
Mike, We are currently wave soldering several assemblies with with a lot of ground plane. The soldering handbook we have in house suggests a preheat temp for metal core multilayer boards of 230 to 270 degrees F' (110 to 130 C'). It was scary at fir
Electronics Forum | Tue Oct 22 12:43:05 EDT 2002 | Brian W.
I think you need to define what it is you are looking for. Changeover time, Efficiency and measuring run time to your quaoted time are important, as is quality. You need to look at all of these things to determine the "health". It does you no good
