Electronics Forum | Mon Nov 05 01:31:58 EST 2007 | jmelson
Well, that was a bit of a lucky guess. There are a number of things that can cause that message, and the programmer of the system DID have enough information to make the error message a LOT more specific if he'd wanted to. When machines cost what t
Electronics Forum | Thu Nov 01 10:31:51 EDT 2007 | glenearl
We've not performed any incoming electrical testing on these caps, as it has always been assumed that new parts would be good. However, after reading a number of messages on this site, I'm starting to have my doubts whether or not that is a good pra
Electronics Forum | Fri Nov 02 07:20:43 EDT 2007 | hussman
Why look at buying expensive equipement when you can have your board house multi-up a panel of boards for you. You just saved at least $150,000 American, didn't have to re-evaluate any solder paste, and even opened your process window on your oven.
Electronics Forum | Sat Nov 17 11:36:16 EST 2007 | etienne
On a Dek Horizon 03 the tact time for one panel measuring 400mm print stroke took me 16 seconds at a speed of 55mm/sec. I see no reason for reducing further tact time since loading and unloading PCBs from Pick & Place machines is relatively close.
Electronics Forum | Thu Nov 01 16:41:13 EDT 2007 | slthomas
That might be the stuff. I think what baffles me is that it was readily available and packaged as "thermocouple attachment solder" or some such description, but they apparently don't seem to have it available by that name. It's not a critical issue,
Electronics Forum | Fri Nov 02 09:00:09 EDT 2007 | ck_the_flip
Steve, your best solderer in your shop will know that this ain't standard wire solder. I always put the best solderer on T/C attachment duty when I have a scrap PCB to play with. They even have difficulty getting the stuff to wet to pads and leads.
Electronics Forum | Sat Nov 03 09:39:27 EDT 2007 | davef
Flux exhaused or CSP never came to peak temperature * BGA balls don't combine with the solder => Flux exhaused or BGA balls never came to peak temperature * 0402 surface looks like many tin balls piled together => Flux exhaused Start your thermal
Electronics Forum | Sun Nov 04 01:04:04 EST 2007 | omidjuve
we are manufacturing some rf boards that works on a high frequency margins now our boards doesn't pass in impedance test and we concluded that the problem might cause by the solder paste that we are using . our solder alloy is sn62/pb36/ag2 and we t
Electronics Forum | Tue Nov 06 07:16:36 EST 2007 | hussman
Run a board with regular solder paste and put your worries to rest. Total cost about $0.50 American. Total Time about 3 minutes placement - 6 minutes oven. Looks like it might be worth a cup of coffe and 9 minutes of your time to try.
Electronics Forum | Thu Nov 08 13:12:02 EST 2007 | russ
Annular rings are too big, it is acceptable to have shorts on the common conductors. I would be willing to say the "other" supplier may have modified the artwork as well. Good fluxing, preheat and proper immersion depth are key to eliminating short
