Electronics Forum | Wed Nov 29 22:09:57 EST 2006 | davef
attrition
Electronics Forum | Wed Sep 13 22:29:10 EDT 2006 | davef
attrition
Electronics Forum | Mon Feb 05 16:38:45 EST 2001 | larryk
What numbers do you all use for component attrition at your pick and place machines? Thanks, Larry
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 | Mon Dec 23 20:17:44 EST 2002 | davef
Search the fine SMTnet Archives for background descussion.
Electronics Forum | Tue Feb 06 10:55:58 EST 2001 | pjc
Larry, Our specification is 0.075% for our Fuji CP3 and IP2 machines. At or above that figure the Maintenance Dept. has to get to work. We typically see 0.03% to 0.05% on average. The Fuji machines are all vision centering. We have found feeders are
Electronics Forum | Mon Dec 23 13:44:46 EST 2002 | Paul Black
Does anyone have a tried-and-true method to account for machine losses of SMT parts? I remember reading an article once that stated that 5% - 10% of components of certain sizes are known to be lost during placement, and I know some CM's overplan by 5
Electronics Forum | Mon Dec 23 16:46:29 EST 2002 | jonfox
If you are using a well maintained chip shooter, you should not see more than 1%-2%, and that is on the high side. Most pick and place machines (depending on what they utilize) with laser, vision, mechanical centering will most likely reject a diffe
Electronics Forum | Mon Dec 23 18:06:38 EST 2002 | jersbo
Tried and True is counting your components if there is any indication of loss... this is a great TOPIC... unfortunately there are many ways to lose components. Feeder setup,problems with a feeder while in the machine(IE mylar problems or wrong step)
Electronics Forum | Mon Dec 23 20:14:24 EST 2002 | vinhmach1
Hi, You can't void of loose parts. But can reduce. You can ask your Lead operator or the the person in charge for that individual line to keep track on the hourly monitor. If they tracking the number of PCB went thru the machine (getting the coun
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