[PCB_FORUM] Re: PTC 3D export... question regarding what data is actually used...

Greg is correct, although there may be another factor may be involved
here.  The data written to the IDF Library File is taken from the symbol
definition.  If you make symbol instance edits in Allegro, these edits
will not be reflected in the IDF Library file because the symbol
definition is unchanged.

John 

-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Larry Briski
Sent: Wednesday, November 07, 2007 8:30 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: PTC 3D export... question regarding what data
is actually used...

Greg,

Do you have a place_bound_bottom shape defined for the symbol?  If it is
larger than the place_bound_top shape Allegro will put that as output.

Also check to see if a shape is defined in the dfa_bound_top subclass. 
This subclass has priority over place_bound shapes in generating the
outline.

The only problem with this is that whatever shape on either subclass has
the highest max package height value has that value passed into the .emp
file.

Larry
Gene Carman wrote:
> I am exporting IDF using the PTC 2.0 settings.  I have one component 
> that was built "wrong" originally, so I modified it in the working 
> .brd file, I changed place_bound_top to a smaller area (modified the 
> shape) and yet the data I get when I export it shows the same old 
> large part instead of the updated fixed smaller part.
> 
>  
> 
> Yes, I have saved, and in fact exited and came back in.  So is there 
> some buffer holding the original part deep in the .brd file, and that 
> is what is output to PTC, or what?
> 
>  
> 
> I assumed that place_bound_top of each part is what is used to 
> generate the 3D images... if so, then why can't I change the shape for
a single
> part and see the modification when I export the new 3D data?   I can 
> move the part and see a change, but the physical shape of the part 
> remains the original placed size.   
> 

-- 
Lawrence Briski
PCB Designer
SGI

lgb@xxxxxxx
tel: 715.726.7440
fax: 715.726.4345
sgi.com
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