[PCB_FORUM] Re: Allegro Sub drawing / Via stitch problem

No, I just routed a trace (inside the shape) from a pin to the vias to force it...Then just export / import to 0,0.
Anyone know how to search for these "floating" vias? Danging via does not work. Would like to locate any instances I may have missed. 

Thanks,
Mark

cadman10@xxxxxxxxxxx wrote:

Hello Mark,
Normaly this happens becouse when the vias do not have a net association they inherit the net name of the first shape they find,B Have you tried to disable the dynamic shapes on the board first , then import your subdrawing, then enable the dynamic shapes and force your imported shape to update first 

good luck

cadman

On Jul 27, 2009, *Mark Salberg* <msalberg@xxxxxxxxxxxx> wrote:

    Not quite that easy Jean,
    Actually stitching to many different power supplies on 8 different
    layers.
    Just want to keep the import the same as the export.
    Importing clip all at once by 0,0 origin.

    Jean Bratton wrote:

        */_IF< /u>_/*_ all of your stitching vias are to GND, then you
        can move all of your non-GND positive planes off-board before
        reading in the clip. Then the unconnected vias will get
        associated with GND, and then you can move the other planes
        back on the board. _

        _ _

        _Jean Bratton_

        _Senior PCB Designer_

        _Freedom CAD Services, Inc._

        _Office: 603-864-1349_

        _Email: jean.bratton@xxxxxxxxxxxxxxx

        _Visit us at http://www.freedomcad.com_

        _ _

        _ _

        _-----Origi nal Message-----
        From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
        [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Mark
        Salberg
        Sent: Monday, July 27, 2009 9:04 AM
        To: Cadence User Group
        Subject: [PCB_FORUM] Allegro Sub drawing / Via stitch problem_

        _ _

        _Hello all,_

        _When Exporting a Sub-Drawing I found that any vias in a shape
        used for _

        _stitching...connected to a shape, but has no traces to a
        pin...looses _

        _connectivity and sometimes connect to a different plane after
        import _

        _sub-drawing._

        _The only way I have found to fix it is to ALSO route a t race
        from a pin _

        _to the via to force the connection._

        _ _

        _Is there a way to locate any occurrences of this prior to
        exporting a _

        _Sub-Drawing?_

        _ _

        _Thought maybe dangling wire reporting as dangling via...but a
        Dangling _

        _via is defined a a via with only one connection from a pin.
        These vias _

        _simply dropped in a shape for thermal reasons do not get
        flagged._

        _ _

        _Any thoughts as to how to find them in a design?_

        _ _

        _Thanks,_

        _Mark_

        _ _

        _ _

        
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