Electronics Forum | Fri Feb 11 18:51:16 EST 2005 | primus
The operators use SET SEQ and SET SEG. I know all about getting these wrong, because if you forget the "Q" or the "G" you get SET SE which is SET SENSOR. That REALLY messes up our BEC! But then again, I believe our BECs are all calibrated wrong anywa
Electronics Forum | Tue Jun 13 06:20:45 EDT 2006 | bk
Well grant just to let you know i feel your pain. I've been wavesoldering with sn100c since January and let's say i'm still learning everyday. Some of the typical causes of bridges are not enough flux when the board hits the solder. Also it can be bo
Electronics Forum | Sun Jan 14 12:42:35 EST 2007 | SMTRework
I think the main cause of this condition is #3 because both #1 and #2 never change from board to board, these are identical boards with identical BGA revisions. These BGA's (as stated before) are about 3 years old.. I don't believe they are lead free
Electronics Forum | Sun Jul 26 05:56:28 EDT 2015 | spoiltforchoice
http://www.surfacemountprocess.com/solder-paste-printing-process.html this site has some pretty good general advice for the novice. I am in no way affiliated with it and I have no idea as to its eventual commerical aims (if any). ENIG if your produc
Electronics Forum | Fri Aug 02 08:12:55 EDT 2019 | dfl
Hey guys, I'm using my Quad IV-c for a while now and I already manage to run some batches, but I never used the "Quad Align" feature before, since almost all my boards are 1206 parts, that doesn´t need a ton of precision to align. Anyway,
Electronics Forum | Thu Jun 25 21:06:38 EDT 2020 | jshepard77
I have an old Quad 100 pick and place from the 90's that currently is not working. We bought the machine for basically nothing. The reason we bought it was that it had a ton of feeders that work with a 4000C machine that we have. Before I take thi
Electronics Forum | Thu Mar 09 05:44:07 EST 2000 | Wolfgang Busko
Hi Edmund, J-STD-013 "IMPLEMENTATION of BALL GRID ARRAY and other HIGH DENSITY TECHNOLOGY" should be a great help for you. Component manufacturers ( try Motorola via Internet) also give good advice. For the DFM aspects get in contact with your asse
Electronics Forum | Thu Mar 02 21:09:22 EST 2000 | Dave F
Doug: To remove paints, we've tried a bunch of stuff like messy, hazardous chemicals (ie, methylene chloride, xylene, toulene). We've blasted (erzat been blasted???), like Stu says. We used etching pens. Auuuurgh!!! Now, we paint over them with
Electronics Forum | Thu Mar 02 13:17:00 EST 2000 | Russ
Jack, a couple of questions first, 1. What pitch are these leads? 2. What are the lead footprint dimensions? 3. Orientation of component? I personally have never had much luck soldering QFPs in the wave unless they are 50 mil pitch or greater, we o
Electronics Forum | Fri Feb 25 04:28:49 EST 2000 | Sze-Pei LIM
We faced terrible void issue while using Sn96.5Ag3.5 solder paste, more than 20% void. We tried adjusting the reflow oven profiles but we did not have much success in reducing the void. Generally, we find quick preheat, high peak temp. and fast cooli
