Electronics Forum | Mon Oct 24 11:04:58 EDT 2022 | richardcargill
The yamaha feeders need leader tape to function - so if you're using cut reel components you'll lose 3 or 4 just on set up alone. Run-time attrition is harder to help with as machine setup and calibration, condition of nozzles/feeders, ability of ope
Electronics Forum | Mon Apr 28 09:33:34 EDT 2003 | chrissieneale
This may be a really silly question but does anyone pick up and hand place the reject parts from the scrap bins of the machine? My attrition rates are out of control and i think this would not only highlight the problem but also save oodles of money
Electronics Forum | Tue Jan 17 21:58:42 EST 2012 | jorge_quijano
Hello guys I hope you can help me, I had worked with machines that usually tell you how many components are dropped off, now I have some very old machines without such information, any idea how to measure if attrition rates are normal? I expect to be
Electronics Forum | Wed Nov 29 00:16:34 EST 2006 | mack3000
Hello everyone, May i know what is the acceptable component throwout rate/percentage for a smt machine(chip shooter and chip placer)in the industry today?
Electronics Forum | Wed Apr 09 15:05:45 EDT 2003 | russ
Probably of no help but here it is anyway This is a tuff one. Attrition is due to many factors. You have machine rejects (visual fail, no pick), feeder set-up loss each time a reel is removed you lose X number of parts depending on feeder design (w
Electronics Forum | Wed Feb 15 10:37:19 EST 2012 | caerleon
The only way you will be able to measure it is to count the reel before you put it on the machine, count them when they come off and deduct the amount expected to be placed. you will then have the result of attrition on the machine. or.. Pick the p
Electronics Forum | Thu Apr 08 03:08:37 EDT 2004 | janetan@mmi.com.sg
If you are referring to SMT chip components, 3-5% is the norm. BUt for some critical items like IC it usually applied as one to one exchanged if it is the component's defects. If the defects cause by processes, then manufacturer had to replace you .
Electronics Forum | Mon Apr 28 11:37:30 EDT 2003 | terrapinstation
Chrissie, There is no "silly" question. It seems to me that, not with standing the issues highlighted in your posting, notably - risks, time, etc.. Your time would be much better spent determining the reason for the reject. If your placement equip
Electronics Forum | Tue Mar 20 21:49:38 EDT 2007 | davef
Mark there is no need to YELL here. Turn it down, please. While you're waiting for other to reply, search the fine SMTnet Archives to find threads like: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=34512 You'll find that the followi
Electronics Forum | Thu Apr 08 03:41:19 EDT 2004 | Ian White
I have worken in production lines where attrition rates were measured and acceptable limits were set using 3 classes of parts:- A=Expensive Parts IC's etc, B= medium cost parts Diodes, tants etc, C= low cost parts typically Chop Caps and R's. We set
