Electronics Forum | Thu Aug 21 22:10:07 EDT 2003 | adlsmt
Well, for some reason the board house will pay for the boards but has some issue with paying for the parts on them. Why am I not supprised? Perhaps I have mis-diagnosed the problem. We have found two different board p/n's with the same type of defec
Electronics Forum | Thu Mar 18 09:25:27 EST 2004 | remullis
Normally when I run into having to hit the ESC key to step through this is the steps I take. 1. Power machine down and restart. 2. Home machine and watch cutter carefully. Both cutter should acuate and the height motors should run CW and CCW. 3. You
Electronics Forum | Mon Apr 12 09:36:57 EDT 2004 | wgaffubar
Russ, These are the pb free components that you mentioned that are coming around the bend. Not the old CBGA's. I use to use CBGA's alot with former company. These are 15 x 15 mm plastic BGA's with 14 mil pg free solder balls going on 8 mil gold pads.
Electronics Forum | Wed Apr 21 12:21:57 EDT 2004 | davef
Please help us understand your situation better. * How do �Having Problems W/ Parts Moving At Reflow� and �When the boards come out of the oven the pads look very wet from flux� relate to one another? * Tell us about solder, flux, reflow profile, and
Electronics Forum | Wed Jul 21 17:49:52 EDT 2004 | jsk
problem: Too many solvents and boards are not clean Flux remains on the board after vapor degreaser and "Powdery" white residue after vapor degreasing Flux type is kester 186 Process: hand solder High Temp alloy, spot clean after hand solder e
Electronics Forum | Fri Jul 23 14:41:41 EDT 2004 | Steve Stach
Dear JSK, It sounds like the root causes of your problem are two fold. First, excessive heat will polymerize the abietic acid found in rosin forming neo-abietic diamers and polymers which are much less soluble than the parent monomer. There are
Electronics Forum | Tue Aug 31 07:51:28 EDT 2004 | dennispoquiz
I used to do optimization on Panasert MV2F/V,Fuji CP6/4,GSM (Universal),Sanyo TCM 3000 with no problem. My problem now is on my old Sanyo V822 SMT chipshooter. I am working on a multi-block (multi-cavity) PCB panel and i cannot, in any way, mount all
Electronics Forum | Tue Sep 14 14:52:22 EDT 2004 | Carol
During processing, the solder in the vias reflows and forms solder balls. PCBs have solder in random PBGA vias from the board manufacturer.The manufacturer says this is a result of the HASL process and is unavoidable. We use HASL finish, multilayer,
Electronics Forum | Tue Sep 14 19:47:16 EDT 2004 | davef
use something other than HASL. "The rest of the world seems to be processing with no problems..." [Hello!!! Earth to Carol. This is a test.] Things you are considering could be more trouble than they�re worth. "1) Reduce via hole size" [If you re
Electronics Forum | Thu Sep 16 21:22:39 EDT 2004 | Darby
Cesar, I am not familiar with these machines but I have found that servo controller problems do not usually cause mis-placement. They tend to just stop the machine with *axis system erors. As I understand it, after you have done a return to origin,