Electronics Forum | Mon Jun 17 21:23:38 EDT 2002 | ianchan
Hi mates, ain't we all forgetting something? this bloke who posted this thread, has not even specified what his "stability-variation" issue is all about? defect/quality variation? downtime variation? CPH variation? etc... Just read this bloke's th
Electronics Forum | Fri Jun 21 15:04:51 EDT 2002 | bentzen
Hi Greg. FujiCam has two ways of calculating the placement coordinate for a component. - The "FujiCam/Unicam way": calculating component origo as the center of the designed component pads. - Use the PCB designers part origo which could be center of
Electronics Forum | Fri Jun 28 01:06:49 EDT 2002 | Dreamsniper
Hi Steve, We have a Heller 1088 (4 Zone Oven) and we are using Indium NC92 with 2% silver. My Oven setting is: Zone 1 Top & Btm 125 Zone 2 Top & Btm 145 Zone 3 Top & Btm 188 Zone 4 Top & Btm 265 Belt Speed 34 cm/min I have run a profile
Electronics Forum | Mon Jul 15 15:44:11 EDT 2002 | davef
For us, no. Pain in the butt, yes. Volume build shops do not have the inherent flexibility that quick turn shops have built into their systems to deal with these problems. I�d speculate that this issue will help LARGE contract shops to rethink the
Electronics Forum | Mon Aug 12 09:40:53 EDT 2002 | itempea
Hi Antonio, you had some wonderful input from the previous mailers. They covered much of the technicalities. What I would like to point out is that if the line has 2 chipshooters and they only use one for you, you still pay for the second one since
Electronics Forum | Wed Aug 14 12:20:17 EDT 2002 | dragonslayr
in other words- who gets stuck with the latrine duty? (have seen American Graffiti, where the "effluent" was burned off with diesel fuel, Lord help the person who got stuck downwind!) The thought of having to swab a tube with some sort of cleaner ma
Electronics Forum | Fri Aug 16 10:00:03 EDT 2002 | davef
You have a very bad situation. It�s tough for the gas, flux material, er whatever to escape when the BGA is sitting on top of it and the blind via is blocking it from the other side. Obviously the vias should have been: * Placed on the edge of the
Electronics Forum | Mon Aug 19 13:16:15 EDT 2002 | kenbliss
Some things to consider 1. can one operator keep up with manual operations and not slow the line down? If yes, great. If no you will need a way to allow more than one operator access to the next board coming down the line to not create a bottleneck.
Electronics Forum | Mon Aug 19 16:57:38 EDT 2002 | dragonslayr
Individual process steps are approximately the same length of time for reworking a BGA. You seem to be comparing the use of the automated SMT line versus an off line rework station. Consider that the off line station is a complete paste print, pick
Electronics Forum | Fri Sep 06 11:58:21 EDT 2002 | Brian W.
The most effective method is to monitor both printing results and parameters. Periodically (maybe once per month), run QCCalc or another program to measure the machine's capability to hold its set parameters. I also run control charts on the paste h
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