[PCB_FORUM] Re: ECAD Property

Let me re-phrase the question and add an example of the behavior that we 
are seeing.
Here's the scenario:
1. read netlist into board
2. read in IDF from Pro/E  to get board outline and place critical parts
3. complete a rough placement of other non critical parts in Allegro
4. export IDF to Pro/E 
5. continue to fine tune placement of non critical parts
6. receive a new IDF from PRO/E with critical parts moved
7. after reading in IDF critical parts move as expected, but other non 
critical parts move back to their rough placement position.

After reading through the IDF documentation, it would appear that since 
the non critical parts are not specifically owned by ECAD, that the IDF 
interface sees the difference between the MCAD and ECAD placement, and 
takes ownership of the non critical parts and moves them back to their 
original position. So it would seem to me that we need to explicitly take 
ownership of all the non critical parts in the design so that these parts 
will never move when an older IDF file is read in.
The mechanical guys tell me that it's too painful export only the parts 
that have changed, and so they export the entire design. So given this 
scenario, should we be setting the ownership to ECAD, to stop any unwanted 
part movement?
Don ...........................




"Christopher Nunn" <cnunn@xxxxxxxxx> 
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08/24/2006 01:40 PM
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[PCB_FORUM] Re: ECAD Property






No, in fact that is a property automatically attached to entities imported 
from Pro E.

From: icu-pcb-forum-bounce@xxxxxxxxxxxxx 
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of 
Don.Kost@xxxxxxxxxxx
Sent: Thursday, August 24, 2006 10:26 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] ECAD Property


Is it necessary to add the property IDF_OWNER= ECAD to all symbols before 
transferring data to Pro E? 
Don ...........................

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