Electronics Forum | Fri Nov 30 14:38:42 EST 2007 | ratsalad
One of our former SMT Technicians used a component we pick and place for this purpose. The component is a bond pad that is soldered to a ceramic PCB during SMT assembly. The assembly is now obsolete. I tried looking up the manufacturer's part nu
Electronics Forum | Mon Dec 03 15:38:24 EST 2007 | bigdaddysoy9
Why don't you create a seperate program using pads as fids. Then, the operators can load this program at the end of the run and print the boards with the bad fiducials. You don't have to keep altering the program, your boss can can go about his day b
Electronics Forum | Mon Dec 17 10:42:23 EST 2007 | kelz
I would refuse to use the PCB's if they are not usable as specified. The fiducials line everything up with the artwork...how can this accurately be done in a manual way? Is the risk of reworking fiducials worth the cost of the potential financial im
Electronics Forum | Fri Jan 25 21:05:24 EST 2008 | daxman
Hey, It's not so bad, but you'll need nozzle jigs to measure camera angle and resolution and also a good dial indicator. I'm pretty sure that I have the pdf's handy as well. send me an email at meshuga@sasktel.net. I'll be able to send you the info
Electronics Forum | Wed Jan 23 14:26:52 EST 2008 | operator
I have seen the bad alignment error many times and never had to replace the head for it. It usually has something to do with the laser windows being dirty or cracked. Also it could be your profile settings. Make sure all of these things are perfect b
Electronics Forum | Tue Feb 12 04:07:29 EST 2008 | aj
Hi, Have you checked out the BGA datasheet and see what profile is recommended for the BGA ? I use OM338 and there are dozens of recommended profiles for the Paste but you have to consider the components aswell. You state your Peak temp which I w
Electronics Forum | Mon Feb 18 02:08:06 EST 2008 | lococost
4 days seems a lot. You could be losing flux activation causing poor wetting on the enig. Check your suppliers data sheets for paste life. If it was contamination on the PCB, you'ld expect other components to solder badly as well. Try using a bra
Electronics Forum | Tue Apr 29 09:40:07 EDT 2008 | nitro
It may be a voltage issue. A very slight variance in voltage can cause this. I have seen it before with one of our machines. I think the 5vdc. was dropping out just a little bit. Turned out to be a bad muffin fan. Power supply was getting warm, 5vdc.
Electronics Forum | Mon Jul 14 09:56:04 EDT 2008 | slthomas
Well, there's that (although it is kind of a gross generalization), plus if an engineer is so great at engineering, maybe he (or she...not the place for gross generalizations!) LIKES what he/she is doing. Promoting someone that doesn't really want th
Electronics Forum | Wed Jul 16 10:36:16 EDT 2008 | mrmaint
We use a "gold" board to verify the performance of the oven. We chose a scrap board, ran it thru a known good profile and saved the results. We have permanently attached the thermocouples to the board so there is no variance as to where you place the
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