Electronics Forum | Mon Mar 20 16:37:41 EST 2000 | JAX
Long time, no see Doc. If you want to use an SOJ algorithm you can probably get away with manipulating the height of the part to get the lighting to refract in the areas you need to. Beware of parts parachuting if you adjust to much, although you sho
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 | Wed Mar 01 09:34:13 EST 2000 | Sorin
HELLO, Do anybody know if is existing an empirical rule that can show me how many amps can carry a plated through hole with a diameter of x.xx millimeters? Is there a formula depending on X.XX value that could help me to make such calculations? How
Electronics Forum | Fri Feb 25 11:13:32 EST 2000 | Russ
This probably won't help much but I find it at least a little interesting. During some experimentation recently I accidently loaded a board into the wave upside down and it had a PLCC 68 package along with other types of components that had only bee
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
Electronics Forum | Wed Feb 23 15:24:24 EST 2000 | Michael Uganecz
Steve, Give MPM/Speedline a call and see if they still sell the SPM-AV, it's a shuttle style printer with vision alignment. It has a really nice auto-align vision system that will move the table in x,y and theta. It's not a look up/look down syste
Electronics Forum | Mon Jan 15 10:32:18 EST 2001 | johnthor
I have to agree with you Wolfgang. Admittedly it's my first look at it but I don't think my opinion will change much. At this point I wish I had taken the time to respond to Brian's request to beta test the "new" site. Maybe I could have made a di
Electronics Forum | Tue Jan 30 12:03:15 EST 2001 | slthomas
Pete, I'm wondering how much optimisation you needed (or were allowed) to do with respect to connector design. The first one we evaluated had a row of leads that I can only describe as "crescent" shaped in cross section. Impossible to get even 50%
Electronics Forum | Tue Feb 06 18:12:46 EST 2001 | davef
Pete makes great points. Taking a slightly different angle, use your placement equipment's software to help you. It keeps track of the number of picks and attempts for each location. Study these numbers for a week and determine the capability of p
Electronics Forum | Wed Feb 07 12:07:34 EST 2001 | stownsend
I know this subject has been beat to death, but I need a clarification. I keep getting mixed messages about how much gold is required on a PCB for a reliable solder joint. Some people are saying 3 - 5 microns, some are saying 3 - 5 micro inches. Do a
.gif)
