Electronics Forum | Thu Jan 18 08:34:40 EST 2007 | Rob
...and Boeing makes wings in China because they want to sell jets into the Chinese market. We make Airbus wings in the UK profiably & effeciently, so I'm sure uncle Sam can too. Minimum of 3000, a lot went via the States for tooling plate changes t
Electronics Forum | Fri Jan 12 08:41:12 EST 2007 | geb
Hi, Our GSM1 pick and place machine has an Axis head 2 Z velocity error. None of the spindles of Head 2 work during placement and it brings up the error message. It will not proceed after that. I have tried lowering and raising the spindles in the
Electronics Forum | Fri Jan 12 15:50:51 EST 2007 | pyro747
Hello all, We have resently run across a solder joint from a through hole part that looks to have a wrinkle effect (star look) from the wave? No pattern it just happens here and there, and some of the joints on the same row look smooth and good. Any
Electronics Forum | Mon Jan 15 13:31:11 EST 2007 | John S.
Since it is in a pallet, I would be sure the preheat temperature is correct across the entire assembly. We've seen large temperatue delta's across assemblies that are soldered in pallets. Could be overheated even or contact time too long. Interest
Electronics Forum | Tue Jan 16 11:24:47 EST 2007 | realchunks
I think John is right. I've seen the same thing (I think, without a picture who knows)on heavy heatsink parts. But I've also seen this happen on larger parts that move right after being wave soldered. I'm talking within a second or two of being so
Electronics Forum | Tue Jan 16 00:03:28 EST 2007 | Stephen- SMT engineer trainee
Thanks for you reply CL. For Q2, I want to know that is there are any ratio of mixing new or old soldering paste? Also, can we put the "working jar" and opened unused solder paste to refrigator and soft it by solder paste softer in next time of prod
Electronics Forum | Tue Jan 16 10:19:36 EST 2007 | slthomas
Then how do we explain the poor printing performance (appears to be rheology based, paste thickening/drying, poor aperture fill, sticking to the blades, etc.) of paste that has exceeded it's shelf life? You know, the stuff that no amount of stirring
Electronics Forum | Tue Jan 16 15:42:45 EST 2007 | slthomas
Now yer talkin'! FTR, I've seen 7 month old (5 month shelf life in a 45� F fridge) WS based pastes in tubes turn to clay and refuse to print through anything less than about 50 mil pitch. This was stuff stored in the fridge per mfr's spec. I suspe
Electronics Forum | Wed Jan 24 10:20:39 EST 2007 | electronhose
Seriously, OSP?, change the board finish, you are the OEM, correct? You have the power! Also, as another poster mentioned, high force applied at ICT ( possibily to cut through the OSP goop ?!? ) could be warping the board enough to crack the joints.
Electronics Forum | Thu Feb 08 15:05:32 EST 2007 | realchunks
Wow, what a bunch of crabby old men. BGA opens can occur from pre,during or post process. I never chimmed in cause the original poster said they would performa a dye test. Yet as usual, they never get back to this forum on what the cause was. So
