Bill,
You don't state but I assume you are using P99SE. The P99SE pick and place
output usually includes three columns of coordinates. The first is the mid point
(calculated as the centre point of all the pads in the land pattern), the second is
the reference location (land pattern library reference 0,0) and the third is the
location of the pin 1 pad. So you have a centre coordinate in the first two columns.
Caveat:
The calculated centre coordinate works with "most" SMT components. However, it
will not give the correct results for asymmetrical parts like TO-263, DPAKs or any
other non-symmetrical pad placement parts. Usually these are a minimum number of parts
and the assembly house will adjust them manually with little complaint.
Sincerely,
Brad Velander
Senior PCB Designer
Northern Airborne Technology
1925 Kirschner Rd.,
Kelowna, BC, V1Y 4N7.
tel (250) 763-2329 ext. 225
fax (250) 762-3374
-----Original Message-----
From: Bill Moffitt (New Class Five, Inc.)
[mailto:[EMAIL PROTECTED]
Sent: Friday, November 05, 2004 12:26 PM
To: [EMAIL PROTECTED]
Subject: [SPAM] - [PEDA] Pick & Place problem - Email found in subject
I've got a design which has been built by the pcb shop. We're taking it over to the
assembly house for pick & place soldering on the machine. The components on the
board all have their center as pin 1. The assembly house needs the x/y data to have
the center as the center of the part. If I change the part in the library and
update the board with the new component info, the part moves on the board.
Is there any way to move a part from a particular point, such as from a pin, instead
of the default way protel moves it from the center?
Has any one created a script to solve this sort of problem?
TIA
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