Jamie,
as per your comments below there is an issue with the Protel pick n
place centroid location. I don't use the pick n place output typically so
bear with me if something is not quite right.
In the pick n place CAM generation Protel has a couple of options
for locating the centroid of parts. One option uses the reference point of
the land pattern (0,0). The other method uses a calculated center of the
part based upon pad locations. For this reason your library parts must have
the land pattern designed with the centroid location at 0,0 in the library
or Protel is going to calculate the center of the part based upon the pad
locations. The calculated centroid location will work fine for most of the
components but you will have difficulties with parts like D2PAKs, DDPaks,
Sot89s, SOT143, etc., etc., where the pads are not symmetrically arranged
around the centroid of the part.
There is no ability to use either methodology on certain parts so
you are stuck with one methodology or the other. For this reason I would
suggest that all your land pattern centroids be located within the library
at 0,0 and use the origin/reference method of selecting your pick n place
output.
As for your query about setting feeders and other issues for pick n
place, this would be a function of other software which should be centered
around the needs of you P&P machine.
Sincerely,
Brad Velander.
Lead PCB Designer
Norsat International Inc.
Microwave Products
Tel (604) 292-9089 (direct line)
Fax (604) 292-9010
email: [EMAIL PROTECTED]
http://www.norsat.com
Visit us at Booth 2G2-09 at CommunicAsia 2002 in Singapore June 18-21.
> -----Original Message-----
> From: Jamie [mailto:[EMAIL PROTECTED]]
> Sent: Monday, May 20, 2002 11:52 PM
> To: Protel EDA Forum
> Subject: [PEDA] Converting Protel CAM Pick Place output files to
> something a Juki KP-620 Pick & Place Machine under
>
>
> Hi All,
>
<SNIP>
>
> Questions:
>
> Do my existing libraries of components need to be massaged to
> best make use of a pick and place machine?
> ie Have the component origin at component center?
> ie Information in some of the text fields to indentify
> component as Through Hole or Surface Mount etc.
<SNIP>
>
>
> Thanks for your input.
>
> Jamie Reuel
> Engineering Manager
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