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Subject: Fanned pattern
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tacoma
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4/26/2005 7:08 AM  
If a via/route fanned pattern were to be built directly into a library part and that part/pattern is then placed on a board and some of that pattern is edited and/or deleted- does the modified pattern/via's revert back to what's in the library if the library part is updated on the board? If so- is there any way to suppress the updating of the fanned pattern?
Padmin
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4/26/2005 7:41 AM  
Updating the modified symbol will revert back to the library part unless you have assigned the FIXED property to the symbol, cline and/or via and have not checked Ignore FIXED property. Hope this helps!
tacoma
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4/26/2005 11:01 AM  
Thanks- what about deleted traces and vias- these can't be fixed- what happens with them when a reload is done?
Padmin
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4/26/2005 11:13 AM  
Those will come back unless you assign the FIXED property to the symbol, but then the symbol won't update due to the FIXED property.
tacoma
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4/26/2005 11:17 AM  
Is there any way to fix just the traces and vias in the symbol so everything else will update?
tacoma
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4/26/2005 11:37 AM  
It seems that this is a serious problem if all the library parts on a board have to be updated frequently (as we do). Sounds as though in our case there is not a way do use library generated fanout patterns?
Charlie
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4/26/2005 11:48 AM  
The method we use separates the fanout from the footprint. The footprint only contains the pins. The fanout is a clipboard that we paste on top of the footprint. This allows us to use different patterns for the same component, depending on the application. A refresh of the symbol does not impact the fanout, unless pins get moved.

Charlie
tacoma
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4/26/2005 11:57 AM  
GREAT SUGGESTION- will try it as soon as I get a chance. Thanks.
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