Electronics Forum: defect collection (Page 1 of 6)

Tombstone defect

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

LED lifted soldering defect

Electronics Forum | Mon Dec 09 21:00:39 EST 2019 | sssamw

Did you solve this issue? It doesn't much look like the flux dried out, ti should be across whole board and has much more same defect if flux dried out. Did you have failure ratio data to show the defect location, for example 10% at location A on bo

What is a typical SMT placement defect rate?

Electronics Forum | Thu Oct 02 15:34:08 EDT 2014 | arifa_anees

the data collected from a standard SMT process is typically very noisy due to the natural.Initially, the most common evaluation method was placement yield.Offset Placement After Solder Screen-printing can reduce or eliminate these defects through cor

What defect in SMT will be cuased by dust contamination?

Electronics Forum | Tue Mar 09 20:58:48 EST 2021 | emeto

This have been solved by storing the boards right in all places I have worked. You open a pack, label and use. If you collect dust in such a small time window, you should totally start paying for cleaning service of the building. Electronics we build

I am looking for the s/w for smt process

Electronics Forum | Mon Jan 08 20:33:15 EST 2001 | Kyung Sam Park

Where can I find this kinds of S/W for SMT PROCESS. With defects collected for each smtline Analyze the cause of defect using D/B in smt process automatically(DB means cause of defects in smt process already prepared with for a long period ex

DPMO's

Electronics Forum | Mon Mar 01 09:14:00 EST 1999 | Jules Winfield

| I'm trying to get a feel for what the industry is doing with regards to collecting assembly defect data in the SMT/PWA process. Is it sampling or 100%? What are the points within the process where critical assembly defect data is collected. We run

SMT Thru-hole Data Collection

Electronics Forum | Wed Feb 24 12:25:14 EST 1999 | Mark Milward

I'm trying to get a feel for what the industry is doing with regards to collecting assembly defect data in the SMT/PWA process. Is it sampling or 100%? What are the points within the process where critical assembly defect data is collected. We run a

SPC - Attribute Defect Data Collection - recommendations?

Electronics Forum | Tue Feb 05 23:51:24 EST 2019 | ushir

Hi all, I am looking for recommendations please on SPC software for an EMS. We currently have an in house system for doing this but it has not worked too well and and would rather go with an off the shelf tool instead of recreating the wheel. We es

SPC and Wave

Electronics Forum | Thu Jul 14 10:00:21 EDT 2005 | chunks

Any one using SPC to monitor their wave solder process? My point is collecting defects and using a scatter plot is useful but only after a problem occurs. SPC's true function is to warn of impending problems that are about to occur. Can SPC really

SPC for Wave solder (defects on PCB's)

Electronics Forum | Wed Feb 08 12:23:12 EST 2006 | slthomas

Just to nitpick a little, collecting defect data and reacting to it really isn't an SPC function. Cal's recommendations (determine critical processes, assess process capability and acceptable limits) are spot on and are pretty much the definition of

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