Electronics Forum | Wed Jul 02 11:18:50 EDT 2008 | realchunks
Key word "work" can take on several meanings. if you go back to why lead-free was initiated, the goal was to eliminate hazardous substances from contaminating our world. Everyone knows this government wide target has been missed. Not only has it b
Electronics Forum | Wed Jun 06 15:59:25 EDT 2007 | chrisawallace
WML, I won't dispute math but I will definitely point out either bad math or a missed target. In your example, you are comparing "Energy used to heat the solder and keep it warm" versus "Energy used to keep the solder warm" and fully discount the fa
Electronics Forum | Fri Mar 16 09:18:52 EST 2001 | pteerink
just gotta put in my two cents worth...... theories are great, and I do not disagreee that almost all root causes can be traced back to human error. ( just an aside, but it would be a little hard for me to get ahold of the production guy somewhere
Electronics Forum | Mon Mar 08 05:03:24 EST 2010 | grahamcooper22
Hi, I fully agree with isd.jww. The difference in the solder joint appearance of the 2 joints highlighted could be down to a few reasons...reflow profile (I know you've checked, but have you stuck a thermocouple on this actual joint ? ), contaminatio
Electronics Forum | Fri Mar 16 16:58:52 EST 2001 | davef
A most evocative title to the tread, Ed. Few companies in Joysee named "C-Tech", eh? I assume we�re talking "C TECH is a distributor of low vision aids and adaptive technology for the blind, visually impaired and learning disabled." [http://www.lowv
Electronics Forum | Mon Oct 24 11:00:11 EDT 2005 | rlackey
You can't really use a pasted board to troubleshoot the program as any components not on target simply slide off with machine vibration and movement as they won't be held by the solder paste. Whereas on double sided sticky tape they remain in place
Electronics Forum | Thu Sep 13 13:29:06 EDT 2001 | mparker
Dave et al, I just print out and read a copy of the aforementioned recommended article. Mr. Mangin gives a clear picture of why DPMO is to be considered a more pure data than First Pass Yield (FPY). However, I must note that his interpretation of h
Electronics Forum | Fri Jun 22 03:11:53 EDT 2007 | vlazern
Our Heller oven is functioning well. However, we see defects from the oven, such as shifted coil inductor components, and missing chip components from time to time. When we re-scan the board at the AOI, the defect was not present at that stage,hence
Electronics Forum | Wed Jan 30 15:10:09 EST 2013 | hegemon
Restoration of the fluxing properties? Can't see adding a liquid flux to a solder paste (assumed expired shelf life) in order to "restore" anything. If the volatiles in the original paste are gone, then adding more carriers and volatiles will not pr
Electronics Forum | Tue Aug 31 14:36:41 EDT 1999 | JohnW
| I'm in univerity research on SMT assembly systems. Especialy Simulation and Optimisation using OR-Methods. We developed flexible simulation models of various assembly-machines and use them for performance estimation (Components per hour) under diff
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