Charles,

        Attrition is dependent on equipment condition.

        I checked what kind of attrition rates we are getting on a well
maintained Fuji CP-65 and it is around 1% for 0805's.  With feeders that
are in good condition, attrition is as low as 0.04%.

        Protos are a different story.  Starting and stopping a turret machine
to correct machine vision problems will cause a loss of all the parts on
the turret and attrition can be quite high.

>-----Original Message-----
>From:  [log in to unmask] [SMTP:[log in to unmask]]
>Sent:  Wednesday, December 22, 1999 9:17 AM
>To:    [log in to unmask]
>Subject:       [TN] Part losses
>
>Merry Christmas. I have a simple one for you more experienced people. I need
>to
>know what typical attrition rates are for chip components. Specifically 0805
>parts. We just came up short on a high profile job.
>Thanks in advance
>Charles Caswell
>Process Lead, PCB
>Frontier Electronic Systems
>
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