Electronics Forum | Thu Sep 22 14:25:13 EDT 2011 | hegemon
Dave has stated the caveats well. I too have similar experience in reworking BGAs that mirrors your own. The only situation where I saw this as an issue, was in memory devices where a row of BGAs might share a commonm heatsink. In those cases the
Electronics Forum | Tue Sep 27 09:43:38 EDT 2011 | dyoungquist
I did not mean to imply building to class III would prevent failures. Since there seemed to be a little confusion about the classes I threw that out to show that class III was a higher standard. I also agree that while re-work can fix a class III d
Electronics Forum | Thu Sep 29 17:42:49 EDT 2011 | action_101
I used Indium WF-9940 at the last place I was at for 5 years. We ran leaded and lead free product in our ERSAflow selective soldering machine with that flux type. It worked good for both applications. The place I am at now we have an Ersaflow selecti
Electronics Forum | Mon Oct 10 15:07:18 EDT 2011 | kahrpr
An extraction system is not a good comparison. The extractor itself is not where they make their money. It’s off of the consumables filters etc. Aois and other larger capital equipment there is no other income stream after the sale other than a few p
Electronics Forum | Tue Nov 08 21:56:23 EST 2011 | tpappano
Hi Jeff, both units have DC servos, and both appear to have the same vision system, although #2 has an additional upward-looking camera with a high magnification lens for die mounting. If I could make use of your hex files, that would be great sinc
Electronics Forum | Tue Nov 15 22:32:07 EST 2011 | doncattoni
Hello Austin, Have you tried to preheat the board or the contact area? Many times with the heat cured materials it will start the cure process and slow the flow of the material. Our Protect-R-Shield silicone product was formulated to be a much thi
Electronics Forum | Thu Nov 03 12:59:42 EDT 2011 | davef
We agree Evtimov that the best way to evaluate AOI is to test known good and known bad boards on a machine, preferably in your own plant. Be aware that I can run all of your boards and assure you that there will not a single false call. It's just th
Electronics Forum | Tue Nov 15 23:03:07 EST 2011 | supse
Hi I have a problem with one of our MY12 machines, the machine stops very often (approx. 10-20 times a day) writing the following error message : f-mot-msetdyn hydra theta/205(f-hrdw-3). We then have to reinitialize the machine to continue productio
Electronics Forum | Mon Nov 21 10:51:12 EST 2011 | scottp
I've never seen a good article with a definitive explanation - just speculation that the increased wetting forces due to nitrogen result in increased tombstones. My own experience is that nitrogen is a very minor contributor to tombstones and can pr
Electronics Forum | Fri Mar 23 08:46:09 EDT 2012 | rwyman
I think you need some new suppliers. Any reputable supplier will have the M-code marked on the outside of the pkg, as that's a req't of J-STD-033. So if it ain't there, tell them they need to properly mark the pkg. Them telling you to "check the i
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