Graham,
The bulk feeder usually has an orientation option for resistors that
uses a photocell to measure the reflected light off of the bright
(ceramic) or dark (black/blue0 surface and rejects upside down chips.
Feeders specific to chip capacitors do not have this option or it is not
installed.
Good Luck!
> -----Original Message-----
> From: Collins, Graham [SMTP:[log in to unmask]]
> Sent: Thursday, August 13, 1998 12:55 PM
> To:   [log in to unmask]
> Subject:      Is resistor orientation (upside down) a concern?
>
> Technetter's
> A theoretical question..  It has been my understanding that surface
> mount resistors had to be mounted right-side up (white side down) to
> facilitate the proper heat dissipation from the part.  Is this in fact
> true or have I been misinformed?
> If true, how do I manage to keep them right-side up if I'm using a
> bulk feeder where the part orientation is not controlled as it is on
> tape?
>
> regards,
>
> Graham Collins
> Process Engineer
> Litton Systems Canada
> (902) 873-2000 extension 215

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