Electronics Forum | Tue Feb 26 17:00:15 EST 2008 | slthomas
I haven't had the luxury of machine based pth assembly in quite a while, but when I did, given that the machines control which parts are inserted (and to a lesser degree where they are inserted) we decided not to perform inspection on that part of th
Electronics Forum | Mon Feb 25 08:14:04 EST 2008 | adetuc
Hi ... We use DRS24C Air-Vac machines for placing BGA devices, and have been having problems with shorts on corners of one device in particular, its a PBGA and its size is 4.5cm square and 15grams weight. When the component is picked up and the com
Electronics Forum | Tue Feb 26 05:10:17 EST 2008 | adetuc
Thanks for the reply Hege, I calibrate the machines every 3 months and have checked that the board carrier to nozzle parralelism is ok. Have tried many different profile settings using a MOLE for readings but still collapsing on one corner. I did
Electronics Forum | Tue Feb 26 10:27:12 EST 2008 | hegemon
We have both DRS24 and DRS25 here. I think you will be much happier with the DRS25 as the underboard heating is superior, of course after a year of using the 25, it has its caveats as well, though minimal. I was a little surprised that you are havin
Electronics Forum | Tue Feb 26 21:23:21 EST 2008 | davef
Several methods are available for singulating or extricating individual flexible circuits from a processed panel; this discussion of the topic applies to all types of flexible circuits. In general, the methods for singulating flex circuits can be bra
Electronics Forum | Fri Feb 29 14:58:35 EST 2008 | ck_the_flip
Here is a useful website that defines Cpk: http://www.itl.nist.gov/div898/handbook/pmc/section1/pmc16.htm For placement equipment, the manufacturers typically give you a glass plate, where the intent is to measure how far off the centroid you are
Electronics Forum | Mon Mar 03 23:24:06 EST 2008 | Mag10
I have a project to evaluate solderability of various metals or plated finish. I'd like to tap in to get some advise. The project is to evaluate solderability of various metals or plated finishes for RF shield application with reflow. Due to the hig
Electronics Forum | Thu Mar 06 11:48:09 EST 2008 | muse95
Black pad with IAg??? Tarnish is NOT black pad. Tarnish is usually just some silver sulfide on the surface and can also usually be soldered through, by using a little additional, or slightly more agressive, flux, and still make a good quality solder
Electronics Forum | Fri Mar 14 15:14:31 EDT 2008 | samir
Dean, thanks for schooling me on this. I talked to an industry collegue whom I met at APEX, and it was he who had told me of the IAg "rework issue." Basically, he told me that they had field failures on QFPs that were a direct result of trying to "
Electronics Forum | Thu Feb 19 13:39:51 EST 2009 | tedel
Yes, I called Fuji as well!! I guess we're all in the wrong buisness... Received a reply from Biral Lubricants in Norway, they state the following... "We have established our own warehouse in St.Petersburg, Florida and handle presently all inquirie
