Electronics Forum | Wed Jan 17 11:43:14 EST 2007 | stepheniii
The dumbest thing I read was the response to me saying people should not automatically send product to China. I was told not to bury my head in the sand. A lot of companies are being lemmings and taking it for granted it's best to send a product to C
Electronics Forum | Sat Jan 13 03:43:38 EST 2007 | Stephen- SMT engineer trainee
We are now using solder paste(OM325) and I have some problems on the folowing process: 1. We use the solder paste softer(Malcom SP-1) to warm-up for 20 mins, when it just take from refrigerator. Is there any problems for solderpaste performance? 2.
Electronics Forum | Tue Jan 16 10:58:42 EST 2007 | realchunks
Yes, it can evaporate. My point was manufacturers suggest cool storage to avoid seperation. I guess if the flux does seperate and get pushed to the top it could have a greater chance to evaporate. I have only seen such seperation on year + old jar
Electronics Forum | Mon Jan 15 11:21:48 EST 2007 | davef
Contractor mantra: * Profile is good * Boards are bad On profiles, the key question is: where did you take the profile? We�d guess cracked connections are giving the intermittent test results when pressing on the components. You use acoustic micro
Electronics Forum | Mon Jan 15 03:42:08 EST 2007 | adamp
Hi all, Last week I have noticed, that solder changed colour in our Soltec wave soldering machine. I am using normal 62Sn37Pb alloy and it's colour changed to violet/darkblue with gold areas. I know that gold colour means that, there is to much Cu i
Electronics Forum | Tue Jan 16 07:07:17 EST 2007 | tk380514
Answers: The component does take solder, no problem We get a full barrel fill with an empty PCB but only on one of the holes, the other hole has so much copper around it. The flux reached the top of the PCB when I tested the empty PCB. The IPC-A-610
Electronics Forum | Mon Jan 15 13:49:09 EST 2007 | leemeyer
Hello all, I am having some trouble with the conveyor speed on an Omniflow 7 reflow oven. Recent profiling showed that the conveyor was running to slow so I calibrated the speed using the instructions in the manual. After calibration there was no ch
Electronics Forum | Tue Jan 16 16:59:39 EST 2007 | realchunks
Pallet angle is usually pretty good. Lead length is also another good thing to keep as short as possible. Air Knives don't work that well. Also check your board. Make sure you have solder resist between each and every thru-hole pad. If the board
Electronics Forum | Tue Jan 23 11:37:13 EST 2007 | electronhose
Here in the Great White North, the best way to check our CM's compliance with the ESD 20.20 is to take a couple months worth of data during heating season and graph it against the outside temp swings. You can easily see how the HVAC system keeps up,
Electronics Forum | Wed Jan 17 03:52:20 EST 2007 | Vladimir
Hi, I am process engineer of SMT production. We have some strange problemn with tantalum capacitors. 1 case: If tantalum capacitor placed near BGA and one of his legs is connected to one of the BGA balls, after reflow we can see short between two or
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