Electronics Forum | Mon Feb 12 13:15:14 EST 2007 | realchunks
Does this meet the SMQ230 recommended time above liquidous? Do you have any parts that cannot withstand 239 degress C? If meet SMQ230's recommended time and temps and your parts are rated for this temp, then you should be OK. The real proof is ref
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 | 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 Feb 19 08:18:03 EST 2007 | realchunks
That's why you have to read between the lines of any article. Even with data from a paste manufacturer, it's still a bit fuzzy on how their paste will actually work. Not many companies have their data that solid, so it's better to experiment and me
Electronics Forum | Mon Feb 12 15:57:25 EST 2007 | pr
Anybody out there using this with lead free paste and willing to share the good and bad? I used them a few years back and had some issues (wasted paste, paste bleeding out around the skids). Just curious if DEK has addressed those problems and how cu
Electronics Forum | Thu Feb 15 15:54:19 EST 2007 | pms
pr, I don't believe there is a differance in performance of the ProFlow head between "Leaded" and "Lead-Free" paste. We have been using the ProFlow for about 4 years now with leaded paste. Yes, some issues to overcome. Mostly in the brand/type of
Electronics Forum | Tue Feb 13 07:54:48 EST 2007 | jax
Smaller Ovens reduce your ability to create extended soak times. Extended Soak Time requirements are determined by your thermal variant across the product. A 5 zone oven could work if your boards are not extremely complex but you are the only person
Electronics Forum | Tue Feb 13 16:05:38 EST 2007 | darby
Kevin, I'm using a 1700W with no problems so far. I have recently completed trials on nine different paste brands on a 1500 as well. Remember the tunnel length is no different between a 1500 and a 1700.... Let me know what paste you are using and I m
Electronics Forum | Wed Feb 14 14:11:17 EST 2007 | greg york
We have profiled hundreds of ovens here and it really is dependent on work going through, I walked in on one trial and was faced with an oven that was literally two foot long and told the guy it would not be suited only to profile and run lead free t
Electronics Forum | Tue Feb 13 15:20:12 EST 2007 | billyd
Fellas: I'm having a tough time with voiding with my lead free water soluble paste under my large BGAs. I know some is almost inevitable, but this is more than I'd like. This is with a slope of .9, soak of 60 seconds, above 217 for 85 seco
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