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 PCB bus bar 

Last post Mon, Dec 10 2012 12:39 PM by eDave. 5 replies.
Started by TH Designs 10 Dec 2012 08:44 AM. Topic has 5 replies and 1015 views
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  • Mon, Dec 10 2012 8:44 AM

    • TH Designs
    • Top 25 Contributor
    • Joined on Fri, Apr 13 2012
    • Warminster, PA
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    PCB bus bar Reply

    I want to make a symbol for a bus bar that I will use for an upcoming project. Will the following approach work?

    What I want to make is a copper strip approx 6.5" long x 0.5" wide that includes 96, 0.040" dia plated holes on a 0.1" x 0.2" spacing grid.

    The copper is to be on each layer (for now assume 6 layers) and the holes are to be plated thru and flooded to each layer.

    In the symbol editor, I have made the array of holes and put a static solid filled shape around them on each layer. Each hole shows a "pad to shape" DRC which I would expect at this point. When I bring this symbol into the board and edit the shape to attach it to the net, will these DRC's go away? I woud expect to have to assign the net to each layer shape... Correct?

    Will this approach work, or am I dreaming......................

    Tom

    • Post Points: 20
  • Mon, Dec 10 2012 11:54 AM

    • eDave
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    Re: PCB bus bar Reply
    Why not just make it a single through pin with top, bottom and internal pads and a hole array?
    Dave Elder, Tait Communications
    • Post Points: 20
  • Mon, Dec 10 2012 12:23 PM

    • TH Designs
    • Top 25 Contributor
    • Joined on Fri, Apr 13 2012
    • Warminster, PA
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    Re: PCB bus bar Reply

    Dave,

    Not quite sure where you are going with that. I'd like to make it a library symbol so I can easily reuse it. I have been playing with it most of the day and I am really not making any progress.

    I have used the pad array generator to get the 96 holes. Then put a filled shape over the hole area. When I bring this symbol into a board, edit the shape to assign a net to it, all of the holes show drc's and do not connect to the shape electrically.

    I'm really considering just making a Captur part with 96 pins, tying them all together and then to the net desired. I can add a new sheet to the schematic just for these parts. Then the whole mess will be netlist driven and the symbol should connect. It just makes the schematic one sheet longer.

    I knew exactly how to make this happen in the old version (Layout)................

    Tom

    • Post Points: 35
  • Mon, Dec 10 2012 12:33 PM

    • Roger BFS
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    Re: PCB bus bar Reply

    Tom,

    I think what Dave was getting at was to make a "one pin" symbol.  Then define a padstack for the one pin that is your 6" pad on all layers. Then get your 96 vias using the hole arrray multi-dril feature in the padstack designer.   Think that's what I would try, except for the other posting here regarding the multi-drill and offset problems - -

    Luck - -

    Roger

    Roger Green - B F Systems, LLC
    • Post Points: 5
  • Mon, Dec 10 2012 12:33 PM

    • eDave
    • Top 10 Contributor
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    Re: PCB bus bar Reply

    Hi Tom,

    You can do this as a library symbol with a single pin, you shouldn't need a shape (and, as you have discovered, that won't work very well. Add a through pin 6.5" x 0.5" and use the  Multiple drill feature (see attached)

    Dave 

     


    Dave Elder, Tait Communications
    • Post Points: 5
  • Mon, Dec 10 2012 12:39 PM

    • eDave
    • Top 10 Contributor
    • Joined on Sun, Jul 13 2008
    • Christchurch, 00-NZ
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    Re: PCB bus bar Reply

    Hmmm. Rows and colmns appear to be limited to 10 x 10. You may need to consider adding the majority of holes as vias.

    Dave 

    Dave Elder, Tait Communications
    • Post Points: 5
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Started by TH Designs at 10 Dec 2012 08:44 AM. Topic has 5 replies.