Electronics Forum | Tue Jun 26 15:28:01 EDT 2007 | hegemon
There are a lot of variables in BGA rework in general, and the switch to lead free has only magnified some of the sore spots. Perhaps with a little bit more information someone here can be of help. What is the size and thickness of the PCB? What
Electronics Forum | Fri Sep 09 21:09:20 EDT 2011 | hegemon
Wow, a lot of questions here...and you are definitely doing some "tough sledding". To the point. If you have 3 - 22" zones you'll have to calc your belt speed and temperatures to match the solder paste requirements with regard to flux activation an
Electronics Forum | Fri Oct 02 10:34:20 EDT 2015 | dyoungquist
After looking at your profile, some general thoughts.... Your profile looks like what is commonly called a ramp-spike profile and not a ramp-soak-spike profile. Going off of Sarason's comment, you may not have a good soak period before the spike in
Electronics Forum | Wed Dec 10 08:30:20 EST 2008 | rgduval
Are you using no-clean solder, or just no clean flux? If you're using a solder with WS flux in the core, and a no-clean flux; we'd suggest switching to a WS flux to help during the soldering. If you are using a no-clean solder/flux combination, you
Electronics Forum | Mon Jul 03 05:39:05 EDT 2006 | ronalds
Hi, I am experience problems while testing wave soldering SMT components that are glued on the solderside (lead free). Between de leads of SOx type IC's and SOT's develop a great deal of solder beads. I have been using a RSS temp.profile while spr
Electronics Forum | Fri Sep 22 09:45:26 EDT 2006 | bradlanger
Greg, All the above. It looked like it was going to be a drop for SNPB HASL at first but after a few thousand boards we started running into all the problems you are describing. We first started seeing non wetting on SMT pads. The solder would wet t
Electronics Forum | Tue Jul 29 12:51:40 EDT 2008 | grics
I am having some problems with some of my pcbs at ive solder. We are using an ersa versaflow. It has an automated spot/spray fluxer (Interflux Pacific 2009M) , 1 preheat stage, a leaded pot/nozzel, and finally a lead-free pot/nozzel. Nozzels move, b
Electronics Forum | Wed Feb 14 16:58:12 EST 2018 | cbart
you would be best to get this from your paste/solder manufacture. but here are some rules of thumb: -Solder paste out of fridge before use - get out the night before needed.. don't let your op's warm on the oven!! you will regret that! if not over ni
Electronics Forum | Mon Aug 27 12:31:04 EDT 2012 | rway
Its no my turn to give some advise. My first > question would be can you put the boards into a > carrier of some sort. There are many wonderful > companies that make carriers that are ment for > running down a smt line. This can be expensive > u
Electronics Forum | Fri Feb 18 00:44:44 EST 2005 | Grant
Hi, I would immediately go out and purchase a profiler as you will save the cost of it on rework savings. We use a SlimKIC, and the software with it's so good it will let you adjust the oven temps to make your profile fit your paste specifications
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