Electronics Forum | Thu Mar 06 14:54:52 EST 2003 | vortex
Hello Mike, Recently a customer questioned why my company does not perform SPC readings. My answer was simple, we collected data for about a year without any major problems that couldn't be determined by simply looking at the pcb. It has been ab
Electronics Forum | Sat Mar 08 02:43:16 EST 2003 | Frank
We are trying to implement AOI into the mix. One PE wants it Pre-Reflow, to catch and fix the PnP screw ups and the other PE wants it Post-Reflow, because the oven will fix quite a bit of placement offsets and mainly to catch any problems that the R
Electronics Forum | Tue Mar 11 10:19:00 EST 2003 | yngwie
We ran doublesided SMT thru Glue and Wave process before and but faced a lot of skip solder. Then the customer told us that they have similar problem when they ran the board so what they did was they print the paste-dispense the glue- place the comp
Electronics Forum | Tue Mar 25 09:08:13 EST 2003 | davef
Rework and repair methods are: * 7721 - Repair & Modification of Printed Boards & Electronic Assemblies * 7711 - Rework of Electronic Assemblies There are no standards regarding: * Repair and rework of electronic assemblies. * Reclaiming component
Electronics Forum | Mon Apr 28 04:02:39 EDT 2003 | chrissieneale
Hey, i'm back from the holiday. Progress on this board is quite good actually, althought the guy who i got to take off and replace all the bga's won't even look me in the eye!! He said he had a really tough job re-doing all the paste. 22 BGA's in a
Electronics Forum | Thu Apr 24 18:30:01 EDT 2003 | stepheno
I thought autoclaving was cleaning (well sterlizing) something with steam and pressure. It almost sounds like that is what is happening to the boards in question. Are they being "cleaned" or sterilized? During this steam cleaning, is all air evactu
Electronics Forum | Wed May 21 12:55:35 EDT 2003 | Zhenya
Several things for your reference: 1. Starting with data collection: - Have you done a measle chart to illustrate the pattern of the defect? - Have you checked the corelation between shift/time and defects rate? - How about a pareto chart? - Do
Electronics Forum | Wed Apr 30 20:33:15 EDT 2003 | davef
Haaaa!!!! Yes, we�ve seen things like that. We found that a high input impedance amplifier worked fine in a room with a controlled environment and worked poorly in the sweat-shop portion of our plant. We were using good ol� WS609, straight water w
Electronics Forum | Wed May 28 08:25:08 EDT 2003 | davef
That's what we do [no more than three reworks or mods]. Your "four reworks permissable" was probably based on the 55110 five thermal cycles, counting wave soldering as the first cycle. How do you plan to keep track of each of those rework actions?
Electronics Forum | Thu Jul 17 11:36:41 EDT 2003 | caldon
My AOI wish list would include features that: 1)Character recognition, 2) Correct Placement (including missing), 3) Solder joint inspection (solder present), 4) Shorts, 5)Polarity check, 6)Coplanarity, 7)gerber/or Cad compatible (no gold boards), 8)e
