Electronics Forum | Wed Apr 16 11:29:31 EDT 2008 | mmjm_1099
Per Tony SMT Here are more photos: Q15, Q16, Q17 represent good transistors on a 1 up board with the transistor locations that are in question. Q13 is a good transistor on a bad 2up board. Right next to it is Q14 a bad transistor on a bad 2 up boa
Electronics Forum | Mon Apr 21 11:55:29 EDT 2008 | realchunks
"Disturbed" usually means some form of movement. I would think your leads are moving due to warp as the board exits the reflow zone. Not knowing your profile, I would suggest checking your profile. Make sure you have adequate "above liquidous" and
Electronics Forum | Wed Apr 23 15:23:16 EDT 2008 | cassedra
I am looking for users of YesTECH AOI that would be interested in comparing notes on what minor problems you have had and how you may have figured out what you could do that didn't require YesTECH support? Or little tricks that help you make the mac
Electronics Forum | Wed May 21 13:38:22 EDT 2008 | pjc
Solderpaste types have a big effect on print performance. Go to this link to see if the solderpaste you are using has been tested, see "Rheometric Pump Paste Tests" under MPM: http://www.speedlinetech.com/news_publications/application-notes.aspx?OnI
Electronics Forum | Fri Jun 20 18:32:55 EDT 2008 | hegemon
Back when I used to do a lot of these style devices we ran into the same problem you are describing. Use a pattern for the center pad area and keep the total coverage to about 68% of the pad area. Diagonal Stripes, tic tac toe, cloverleaf, dot array
Electronics Forum | Sun Jul 13 16:51:08 EDT 2008 | edmentzer
We are a small contract manufacture who started out using the component manufactures part numbers. That lasted about one month then we had an apple and orange with the same part number. I looked at what my customers were using, one had a real good
Electronics Forum | Wed Jul 23 08:18:29 EDT 2008 | davef
Q1. Is this a standard process for plugging? A1. Not as such. We checked both IPC-6012 and IPC-SM-840. Neither comments on plugging. So, your fabrication notes rule the day. Q2. Is this okay for such thick PCB's or is it mandatory to use a special pl
Electronics Forum | Wed Aug 27 14:38:20 EDT 2008 | rgduval
Does your paste provider recommend a TAL? For the leaded and lead-free pastes that we use, the manufacturer recommends 60 seconds above liquidous. I note that your profile shows the TAL as 30 seconds, which may not be sufficient. That said, tho
Electronics Forum | Wed Oct 08 09:25:45 EDT 2008 | dphilbrick
Kinda got that Mike but here is the problem. I have 1.8 mil parts that need to be NON-RoHS. 85% of those parts being STD R's and C's. I am looking for a place that provides at close to standard cost R's and C's with something besides pure tin termina
Electronics Forum | Thu Oct 30 14:46:33 EDT 2008 | rgduval
I've used DBA in the past. It's not a bad MRP software for the price. Though, your mileage may vary. We were using an older version of it at my last company, and there was no desire to upgrade. From a manufacturing standpoint (bill of material co
