Electronics Forum | Fri Feb 16 13:43:07 EST 2007 | ck_the_flip
Hi Darby, Where did you get the info. that cooling rate is not-as-critical for lead-free? I'm not doubting you, and I actually want this to be the case. We don't have chillers on our ovens, and on fast profiles, we only achieve 2 to 2.5 deg. / s c
Electronics Forum | Mon Jan 19 08:37:16 EST 2009 | lkpdsund
Hello all! We possess a speedline electrovert omniflo 7 reflow oven at my site. Last week we examined how the solder profile was affected by fan-speed and by providing the soldering process with compressed air(O2) or nitrogen(N2). We also ran the sa
Electronics Forum | Mon Feb 19 08:00:46 EST 2007 | ck_the_flip
Darby, thanks for the good info. I actually read an article is Circuits Ass'y that a more rapid cooling rate results in "better diffused tin rich clusters" resulting in better grain structure. But...this article was written by an Oven manfuacturer
Electronics Forum | Mon Apr 11 06:37:59 EDT 2005 | amstech
As long as you have a continuous profile with required soak and dwell periods, the zone lengths do not matter. For lead free, usually ramp to peak is preffered.that is with minimum soak (you can not avoid soak anyway. You can achieve the profiles irr
Electronics Forum | Wed Feb 21 15:29:34 EST 2007 | wavemasterlarry
I here alot of guys at my place talking about cold spots in the oven. You may want to check for them in yours.
Electronics Forum | Mon May 24 16:45:44 EDT 2004 | Bob
BTU as well as most oven manufactuers have great products. If they fit what your looking for and can give you good support(preferably local) then you should not really see any quality problems with their products. With the oven max temperature of 300
Electronics Forum | Thu Mar 21 22:46:37 EDT 2013 | padawanlinuxero
Do you have the thermal profile? Once I invited my nephew to my work and saw the reflow oven and saw how it work and the first questions was : "can we make a pizza uncle?" :o) I always try to do just that even with a small amount of dough :o)
Electronics Forum | Mon Feb 12 13:58:10 EST 2007 | campos
Tks for the answers,, My concern is about the intermetalic layer,,I run SMQ230 LEAD FREE paste.. its liquidous at 217C..the oven have 7 zone, but I run in 5 zones also with a more agressive profile (due to the line rate)..I would like to know if runn
Electronics Forum | Fri Jan 30 04:10:10 EST 2009 | sachu_70
Hey Daniel, N2 gas provides an inert atmosphere which help to minimise oxidation, generally a concern across the reflow zone. Although N2 provides a more shiny solder joint, it is certainly more of a cosmetic issue and does not certify joint reliabil
Electronics Forum | Sun Feb 18 16:47:34 EST 2007 | darby
As I stated, the reply was direct from Indium, (thanks to Rich Brooks). The information regarding cool down rates should come from your paste supplier; not an oven supplier; not a generic article on lead free. I just went through the data sheets from
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