Marc,
        Yes!!!, placement machines are affected by how tightly components
are sealed in the reels.

        I'm assuming you are talking about the cover tape on tape and reel.
Some machines use a mechanical ratcheting system with one way clutches on
their component feeders to pull the cover tape off the tape.  As the feeder
is mechanical, it is subject to wear.  Just guessing, but I would say 50% of
time a placement machine stops for a feeder error, it is because the cover
tape is not being pulled back, thus preventing the machine from picking
parts.

        Technically, the problem is a faulty feeder that needs repair, but
truthfully, it does not get repaired, so the harder to peel cover tapes will
continue to cause a problem.

> -----Original Message-----
> From: Marc Bituagan [SMTP:[log in to unmask]]
> Sent: Monday, January 24, 2000 3:57 PM
> To:   [log in to unmask]
> Subject:      [TN] Peel Strength Inquiry
>
> Hello Guys/Gals,
>      This may sound "basic" but... what is the basis for having peel
> strength
> values in a range i.e. 10 to 100 grams-force, 10-130 gm-force. A customer
> once
> mentioned that they use the upper values of the specified range to prevent
> unreeling during shipment and handling. A colleague argues that we should
> stick
> to values close to the average of the range. Which is which??? Are SMT
> auto
> placement machines anyway affected by how "tightly" or  "loosely"
> components are
> sealed in the reels?
>      Anyone out there with an answer, sure could use your input....
>
> Marc
>
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