Electronics Forum | Wed Jul 19 21:11:40 EDT 2006 | ec
Hi Dave, Sorry that I did not explain clear enough. What I mean normally after reflow, the solder joint is very smooth and there is wetting. But now we see there is hole on the solder surface and is not on the same loaction. This product have been r
Electronics Forum | Tue Dec 24 11:01:19 EST 2013 | davef
I wouldn't get too tightly wrapped around the axial of paste suppliers recommendations of thermal recipes. Said another way, "Do not count on the solder paste representatives for good technical advice--they are the ones who came up with these "'TIME
Electronics Forum | Wed May 28 08:46:39 EDT 2008 | ck_the_flip
I've talked to several Applications Engineers and Chemists from a couple of different paste manufacturers and they confirm that the profiles on their data sheets are nothing but guidelines. It's up to you, Process Engineer or Process Tech, to develo
Electronics Forum | Mon Oct 08 09:48:22 EDT 2007 | slthomas
I used to just follow up profile development with a single pass with a MOLE, one thermocouple in air. I'd keep that profile as a baseline, and have the operators run the MOLE through prior to production and compare the results to the baseline. I foun
Electronics Forum | Thu Apr 15 20:41:22 EDT 2004 | Ken
There are ledgitimate reasons for checking furnace calibrations, but let me clarify what that is. 1. TC's are not necessarily calibrted. Not unless you need "absolute" accuracy. TC's operate against a (non-linear) standard +/- a tolerance. Most
Electronics Forum | Mon Apr 14 16:21:58 EDT 2008 | ck_the_flip
Bottom-side SMT parts CAN and DO go liquidus during the 2nd reflow cycle. It could be that there was enough variability between the 2 different lot code PCBs to cause the parts to fall off. Remember wetting force determines surface tension (the abi
Electronics Forum | Tue Jun 28 18:20:49 EDT 2005 | russ
Matt, have you run a profile on this board? Just because it's .062" doesn't mean that any old .062" profile will work. We have .062" thick boards that almost nil for copper and other are utilizing 2 oz. layers internally. They require quite diffe
Electronics Forum | Wed May 28 07:44:28 EDT 2008 | rgduval
Hi, AJ, In general, the peak PCB temperature is variable depending on the profile used. We try to keep our peak temperatures in line with the paste manufacturers recommended temperatures; ignoring the peak temps for the PCBs. For the peak temps yo
Electronics Forum | Tue Jan 17 21:40:08 EST 2012 | gaz
I'm testing SN100C, and with our 5 zone oven I seem to be able to fix one issue by changing the profile, but that might introduce a new problem. Some profiles work very well on most components, but have issues on other components. These are usually 0
Electronics Forum | Wed Mar 11 15:39:34 EST 1998 | ETS
For Sale: Full convection reflow oven, slightly used. 5 zone, 100" heated length, 200" overall. 40" cooling zone, edge rail conveyor, built in profiler. For information contact Brian Stumm @ 509-483-0900 or by e-mail.
