Electronics Forum | Fri Jul 27 08:49:03 EDT 2007 | samir
d0min0: I will try to email you the file from this site. Sometimes SMTNet's email utility does not work. Or, try to email me directly: samirpaperjam@gmail.com
Electronics Forum | Fri Jul 13 04:58:01 EDT 2007 | pavel_murtishev
Good afternoon, Heating/Cooling rates contribute to warpage most of all. Try to tweak you profile so that heating/cooling rate would be minimized. Try to switch cooling blowers off maintaining required peak/TAL. Check copper balance for this PWB, by
Electronics Forum | Sun Sep 09 22:07:13 EDT 2007 | jepoy
After you tried the procedure, what the MCS error indicate? If you try to format the PC, all data stored will be erased.
Electronics Forum | Wed Sep 19 19:48:16 EDT 2007 | simmcircuits
Yes, but it does not continue, it tried to weigh the squeegee but then after trying several times it would come up with an error that the Squeegee Left is not Free (up). Cheers
Electronics Forum | Thu Nov 08 10:05:04 EST 2007 | pjc
I have not seen hold size as an issue when switching Sn/Pb to Pb Free wave soldering. Trying increasing your dwell time in the wave- typical for Sn/Pb is 2 to 3 seconds. Try 5 seconds to see what you get.
Electronics Forum | Tue Jan 15 18:47:14 EST 2008 | operator
Funny you mention this. I tried this first. I have one now I am trying to sell for $87 dollars on EBAY. I am sure it could be useful for something other than electronics inspection. For electronics inspection of completed circuit boards it BLOWS!
Electronics Forum | Wed May 14 09:40:55 EDT 2008 | realchunks
Try running the second side first on a board. If it wets well, it points towards your board house. Run a blank board thru your oven and then try your normal process. If you see issues with the first side now - it definitely points towards your boa
Electronics Forum | Fri Jul 25 07:26:45 EDT 2008 | realchunks
From what I can understand, you say this only happens on one type of BGA (?). Try baking this BGA. You may have out gassing during rework. Do you use tacky flux during rework? If so, try a different flux. And last, check your rework profile.
Electronics Forum | Mon Aug 11 10:48:06 EDT 2008 | realchunks
Too much flux will spatter and can leave balls on either side. From your pix you may too little flux. Try turning up and see. Also try hand applying your alcohol based flux and running through. Will take away a few question marks.
Electronics Forum | Wed Jan 14 06:41:08 EST 2009 | andrzej
I did not tried this before (never hada chance to do it) but I considered such option - maybe try using temporary wavesolder mask on such small components. Run both sides of PCB through SMT oven and then mask 0402 completely and go with wavesoldering
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