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
Electronics Forum | Wed Jan 17 11:21:29 EST 2007 | BillW
I have been using overall combined DPMO of SMT PCBAs as a performance metric. All defects are recorded down to component location and defect category. The resultant defect data table is analyzed with detailed pivot tables, defect type and defect loca
Electronics Forum | Wed Jan 17 17:17:21 EST 2007 | russ
i would say that you are there already. with 10,000 DPM0 you have a 1% fallout, you are at 99.9 basically. 1 out of a 1000 boards will fail? of course one thing we need to know is how many opportunitites do you count for a chip resistor for exam
Electronics Forum | Wed Jan 17 18:08:51 EST 2007 | John S.
We use a fairly simple system. IPC put out standards 7912A and 9261A to define opportunities. Basicly the "number of components" + "number of solder joints" = "number of opportunities." Some six sigma benchmarking studies indicated "Sigma Level" =
Electronics Forum | Wed Jan 17 13:33:23 EST 2007 | slthomas
We're in the process of trying to select a rebuilt, refurbished, or well serviced flexible placer, something that's capable of placing in the neighborhood of 10k and up. We're a high mix low volume shop so easy setups is key. I'd be looking at a MY-9
Electronics Forum | Wed Jan 17 14:13:31 EST 2007 | jax
You might want to try going to the manufacturer about getting a refurb unit with a warranty. All of the manufacturers listed provide refurbished equipment deals that can be packaged with feeders. If you go with a broker or 3rd party rebuild hous
Electronics Forum | Thu Jan 18 08:30:12 EST 2007 | CL,
Good Morning, We also are using Mirtec. We have a total of 5 machines now. 3 in SMT, 1 in RoHS and 1 in Through Hole. We have had incredible luck with these machines and their service is outstanding. I do not have any experiance with the other machi
