Anthony,
   Note that this applies to smt devices only. Pin-in-hole (thru-hole)
placement
machines still use the pin 1 location as the part origin.

Regards,
Brant McClelland
Design Center,
Solectron Texas
[log in to unmask]



> ----------
> From:         SteveZeva[SMTP:[log in to unmask]]
> Reply To:     TechNet E-Mail Forum.;SteveZeva
> Sent:         Thursday, March 26, 1998 12:28 PM
> To:   [log in to unmask]
> Subject:      Re: [TN] Land Pattern and Component Modeling
>
> Hi Anthony,
>
>       I've don't know the exact reasoning behind it, but in all the gerber
> files I've seen, the component coordinates are to pin-1. If the design
> file
> had the coordinates go to the centroid, I know there would be a lot of
> "happy
> campers" out there! That would save another complete operation generating
> a
> CAD placement program...it would seem to me that the centroid location
> makes
> the most sense if there isn't any other reason why everybody uses pin-1.
> Maybe
> it's because that's the way everybody has been doing it over the
> years...kinda' dumb reason, but most of us are sheep anyway
> (GRIN)....B-a-a-a-
> a-a-a!
>
>                                                             -Steve
> Gregory-
>
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