Electronics Forum | Mon Jan 22 09:35:34 EST 2007 | saaitk
Check that your boards haven't been over plated. Too much plating in the hole can slump to the underside of the board during reflow. If you are then press fitting on the underside of the board you can have problems with hole diameter. If the hole is
Electronics Forum | Thu Jan 25 04:11:09 EST 2007 | aj
Tricky stuff. I would expect to hit between 210-215 peak temp on Lead process. What sort of profile are you using? I would imagine a good soak zone would be critical- I have never had BGAs on bottomside so cant really advise any further,i will be in
Electronics Forum | Thu Jan 25 15:58:49 EST 2007 | slthomas
Does the t/c read the actual skyrocketing temperature (you could confirm with a profiler if you wanted to leave it running while it's setting itself on fire) or something much lower than reality, driving the heaters harder? I would probably start sw
Electronics Forum | Wed Jan 31 05:23:37 EST 2007 | pbarton
Barry, We do not see much in the way of solder splatter or solder balling. We have removed some parts but in the process of doing so we remove any useful evidence really. Quite a lot of the solderable portion of the part is on the underside. Like
Electronics Forum | Fri Feb 02 13:04:34 EST 2007 | daxman
Hey, thanks for the reply. I decided to check the tops of the clutches at station 8, and there is .16mm of variation between the highest and lowest clutch. It's weird because they are all new. If the tops of the clutches have variation, I'm sure to
Electronics Forum | Tue Feb 20 13:24:35 EST 2007 | Wave Master Larry
LISTEN i know its been awhile but i'm back.just got back from consulting in China. i tell ya them Chinese realy have there acts together. anyway ive recently been consulting for SMTA as well. you see here i am posting from thier address.i'm pretty ti
Electronics Forum | Fri Feb 09 17:09:29 EST 2007 | flipit
I think it depends on the shield and how it is configured. If your shield has some openings and your placement process is good, you can try it and see how it goes. I place small shields on small PCBs (1" X 2") and have no problems. There are 20 mi
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 | Fri Feb 16 15:21:42 EST 2007 | ck_the_flip
CK, I'm also "CK", but have been C.K. since way back. See my old posting, from 1999: http://www.smtnet.com/Forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=2819&#Message11498 Anyway, I now go by "CK the Flip" to avoid confusion to this f
Electronics Forum | Tue Feb 27 12:45:08 EST 2007 | russ
Boy it is good to see the wave master back in action! I mean really guys, is Larry the only one here who knows that the lead turns into vapor in the oven and then in the cooling zones it falls back onto the board and creates the solder joints? P.
