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March 1998

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Subject:
Re: Land Pattern and Component Modeling
From:
Jeff Seeger <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 26 Mar 1998 14:34:08 -0500
Content-Type:
text/plain
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text/plain (33 lines) 
Jim Bauer wrote:
>
> My understanding is pin 1 was used as the orgin to help improve the ability to route using a grid
> based router.  These days I don't think that is much of an issue with the newer gridless routers
> snip <

        The pin 1 origin is used for through hole components,
        for the benefit of programming the axial/dip inserters
        of that day.

        Centriod origin is used for SMDs, for programming that
        type of equipment.

        Many many companies (and CAD vendors) missed that tran-
        sition and continued locating SMDs by pin 1.
--

      Jeff Seeger                             Applied CAD Knowledge Inc
      Chief Technical Officer                      Tyngsboro, MA  01879
      jseeger "at" appliedcad "dot" com                    978 649 9800

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