Electronics Forum | Wed Feb 14 08:15:08 EST 2007 | CK the Flip
I agree with Rob that voids are often times paste-dependent, and it's all about the type of flux that's used. The cause of the voids, as you all know, is outgassing of flux which has nowhere to go with BGA's. Some paste mfgrs. will recommend going
Electronics Forum | Fri Dec 08 23:02:24 EST 2000 | LeeKibler
Beware the foam fluxer. I had a problem with cracked caps that just about drove me off the deep end. I discovered that my foam fluxer air knife was not turned on resulting in excessive flux. The excessive flux (VOC free) was not properly dried off
Electronics Forum | Fri Apr 05 17:38:54 EST 2002 | davef
We socket no parts prior to the wave. This practice is an artifact of the days when we�d solder PTH socketed parts from the heat of the wave being conducted through the socket leads to the leads of the component. Sockets??? Thaint sockets no more.
Electronics Forum | Thu Jul 23 13:23:45 EDT 2020 | bmalhi
Small components blown issue could be due to one of the below. - Process issue; Make sure solder paste is fresh, if flux is drying out it will not hold parts properly. Check downward pressure of Pick Place. SOT may have to be pushed a little harder i
Electronics Forum | Wed Oct 27 09:39:54 EDT 2004 | loz
Hi all, been recently wave soldering some pcbs with no problems and have now noticed what looks like blue residues on some solder joints. We have been running this product for around six months and this is the first time we have seen this. It is rand
Electronics Forum | Thu Dec 10 12:53:12 EST 2009 | deanm
Bryan, Dyoungquist is correct. You should not need to mix solder paste. Overmixing solder paste can adversely affect it. Follow these guidelines and you should be fine: 1. Keep unopened containers of paste in the refrigerator. 2. Take one container
Electronics Forum | Wed Feb 23 00:45:49 EST 2011 | tsvetan
Does someone with technical knowledge knows what exactly happend with the solder paste after the shelf life pass? What we have seen is sometimes flux separation which disapear after a good mix, and change of viscosity i.e. drying. The tin, silver and
Electronics Forum | Fri Jun 24 07:32:53 EDT 2016 | davef
Tell us more ... Have you checked the density of your flux? How old is the flux? Is this a spray or a foam fluxer? What type of maintenance is being done? Do you get good hole fill with the the tank pressure of 130 on other boards?
Electronics Forum | Fri Jul 01 11:00:24 EDT 2016 | sachinverma
its spray fluxer we deassemble the nozzle clean and reassamble again. flux tank also clean with IPA. ya same problem in all product plz find the attachments about flux
Electronics Forum | Tue May 03 10:57:22 EDT 2005 | Frank R.
We received about 5K assembly boards from china. They left flux residu on top of the board and the flux they use was different than us. RESULT ... we use a translucent cylicon to cover the board and it was not possible to dry the cylicon because of
