Electronics Forum | Thu Jan 16 05:10:46 EST 2020 | soupy
Hej, we have some connectors placed on our PCB. 2*30legs 0.5 After reflow we detect lifted legs in the AOI. Always on the outer corners. Is this something ye have experienced? And any possible solutions? Stuff we have tried: Checking the cop
Electronics Forum | Tue May 28 21:00:59 EDT 2002 | davef
That is the rub here, isn�t it? For those posting, it�s easier [but much slower] to start a new thread than to search the archives. [And posters could view their issue so unique and novel that it could never have been discussed several years earlie
Electronics Forum | Fri Feb 25 16:06:51 EST 2000 | Dave F
Istv�n: Given a choice, I�d run second side PLCC44s at 90� to the wave. As far as thieves are concerned, I�d have two, mirror images of each other. Unlike most, these thieves are not connected to pads. They are out-side of the last pad on the sid
Electronics Forum | Tue Aug 29 10:44:01 EDT 2000 | Dougie
Hi, This a dull question I know, but I have a boss who want's an answer... PCB snap-offs: * Design keep them to a minimun to save cost on the PCB * Production want more to stabilise the board when it goes through the process as some PCBs partially
Electronics Forum | Fri Feb 25 16:06:51 EST 2000 | Dave F
Istv�n: Given a choice, I�d run second side PLCC44s at 90� to the wave. As far as thieves are concerned, I�d have two, mirror images of each other. Unlike most, these thieves are not connected to pads. They are out-side of the last pad on the sid
Electronics Forum | Fri Oct 01 06:02:43 EDT 1999 | Bach Huss
Hi, We are running 0402 component on the TCM1000 and we find that teher will be missalignment on 0402 Capositor. We have identified that the missalignment is caused by the wrong information from the vision system while doing vision centering. The sy
Electronics Forum | Fri Apr 23 16:19:17 EDT 1999 | Todd
We are just starting to manufacture a PCB with a .039" fine-line PBGA. We are currently seeing voids, mainly in the center, that are as much as 45%. We also intermittently see the corner balls of the PBGA smaller than the center balls. We are using a
Electronics Forum | Mon Mar 07 18:41:13 EST 2005 | jimmyb
--IE, Funny.--- I "remember" kinda, from the early CP6 years, things about the springs. The early Fuji springs had sharp ends, and if you spun the nozzle, prior to final attachment, the opposite way it could stick, and if it was spun the right way,
Electronics Forum | Mon Oct 15 09:58:27 EDT 2007 | davef
Never heard of "special finger marker stickers" for checking wave parallelism. We assume that you're talking board-to-wave parallelism. We use a Durostone fixture with a thermalcouple [TC] in each far corner of the fixture (flush to the bottom 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
