Electronics Forum | Mon Jan 15 12:42:57 EST 2007 | realchunks
CL pretty much hit the nail on the head. But also remember that solder paste will not go "bad" if not kept cool. It is not a fruit or perishable item (sorry guys, it's not). It's just metal and flux. The only reason they want you to keep it cool
Electronics Forum | Tue Jan 16 01:22:35 EST 2007 | samsim
Hi Stephen, Q2) As per my understanding, no solder paste supplier or any organisation provide Mixing standard or ratio as it is not recommanded. However, I do know that some company, they allow mixing of old and new solder paste (as solder paste is
Electronics Forum | Tue Jan 16 16:46:25 EST 2007 | realchunks
Well, I do know that different solder pastes have different lives. Sh@t, some solder pastes change characteristics from lot to lot. That's why we always restest solder pastes from different lots when doing an evaluation. Some of it has to do with
Electronics Forum | Tue Jan 23 17:27:14 EST 2007 | russ
Well I am a CM, it has to be that OSP finsh!!! hahahaha seriously I hate that finish. but this is big BGA and there could be a multitude of issues as you suggested. Do not assume that the boards were 100% tested for all vias and lines unless yuou
Electronics Forum | Mon Jan 15 11:41:56 EST 2007 | davef
Questions are: * Does the component take solder when you dip it in the solder pot to test the solderability of the leads? * Can you get full barrel fill when wave soldering a bare board? * Is your flux reaching the top of the board through the hole b
Electronics Forum | Mon Jan 15 13:12:18 EST 2007 | realchunks
So others can solder the same board and part but you can't. Dipping the legs in flux doesn't help. Then it's either your pre-heat or wave. Measure your pre-heat and compare to others or flux mfger. Do you have chip wave or something like an Omega
Electronics Forum | Tue Jan 16 07:59:36 EST 2007 | tk380514
we worked out that the wave soldering cassettes Duratstone material takes alomst 35 degree away from the surface of the pcb, and the speed is already too slow it should be over 1.0 - 1.8 meters a minute but its now already 82 cm a minute, in order to
Electronics Forum | Mon Jan 15 15:18:13 EST 2007 | jaimebc
We have an oMniflow 7 as well, and looking at the calibration procedure, it indicates that turning the pots ( total of 5 pots. 4 on the lower board and one on the upper board )fully counter-clockwise is the FIRST step of a series of tests. Then you w
Electronics Forum | Mon Jan 15 16:14:15 EST 2007 | leemeyer
This is a used oven, new to us. No product has been setup on it yet. We were establishing som baseline profiles and noticed that the actual profile read didn't even come close to our optimal profile. Further investigation proved that the belt was to
Electronics Forum | Mon Jan 15 21:54:19 EST 2007 | raychamp007
Dear Friend, Our SMT Production & component ware house RH currently control limit set to 40%RH - 60%RH, but not always achievable, the RH reading measurement are between 38%RH -65%RH. J-STD-001D recommend 30%RH - 70%RH. However it is only a recommen
