Reject Rate Views: 831

Reject Rate	vagyula	10/19/09
Reject Rate	davef	10/20/09
Reject Rate	SAwyer	11/09/09
Reject Rate	egodapitiya	11/16/09

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Date: October 19, 2009 09:06 AM
Author: vagyula  
Subject: Reject Rate

Hi! I would like to read some experience about the reject rate.
We have a Siplace X4 and we mesaure week to week this date.
Please write me something for this your experience.

(http://www.smtnet.com/distributed_forums/Index.cfm?CFApp=8&Message_ID=60134)

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Date: October 20, 2009 06:46 AM
Author: davef  
Subject: Reject Rate


A couple ideas are:
* Search the fine SMTnet Archives. Use search terms such as: ppm or dpmo or *7912 or *9261
* Bob Willis runs a PPM Monitoring project that compiles data from industry. Look here: http://www.bobwillis.co.uk/ppm/asp/Monthly.asp

We have no relationship, nor receive benefit from the company referenced above.

(http://www.smtnet.com/distributed_forums/Index.cfm?CFApp=8&Message_ID=60139)

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Date: November 09, 2009 03:52 PM
Author: SAwyer  
Subject: Reject Rate


Hi, as i know the reject rate it should be under 0,2%.

(http://www.smtnet.com/distributed_forums/Index.cfm?CFApp=8&Message_ID=60379)

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Date: November 16, 2009 01:35 AM
Author: egodapitiya  
Subject: Reject Rate


for reject rate depends on various parameters,
Part data parameters, (Body tolerance,Part pickup & transport speed etc. )
Also depend on vaccum level, ( During the PM we need to messure pickup nozzle vaccumlevel using manometer )
According to raw material supply venders we need to veryfy part data
Some small chips (0402,0201 etc;) are face to magnetizing effect in component pickup nozzles, (Mainly in steel fabricated nozzles)

(http://www.smtnet.com/distributed_forums/Index.cfm?CFApp=8&Message_ID=60449)