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 Custom Vias 

Last post Fri, Feb 21 2014 10:41 AM by Yoda5939. 8 replies.
Started by Yoda5939 10 Feb 2014 11:20 AM. Topic has 8 replies and 2242 views
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  • Mon, Feb 10 2014 11:20 AM

    • Yoda5939
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    Custom Vias Reply

    Greetings,

    I've been on this forum under various names depending upon employment status and I need the forum's help once again. I have a package called PowerBlades. The end mounting to the PCB have two slots that are inserted in the board and soldered in. The remainder of the device is a blade that sticks up about 40mm.. THe mounting hole looks like 3 rectangles that will line up and be the same net as the blade. Anyone have any experience with building a "multi-segmented" pad? Any help will be appreciated

    Thanks,

    Ron Scott.

    • Post Points: 20
  • Thu, Feb 20 2014 1:40 AM

    • kabalee
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    Re: Custom Vias Reply
    hi, Yoga can you post snapshot of mounting hole.i will try to help you.
    kabee
    • Post Points: 35
  • Thu, Feb 20 2014 5:52 AM

    • Yoda5939
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    Re: Custom Vias Reply
    I'll post the screen capture. You'll see the center pins and the two flanking slots that don't make contact. I placed a dynamic shape to check and that's where I found the problem. Each of the slots were formed by the same pad stack. The problem lies in the adjacent slots to the middle ones can not be mechanical slots but the slot changed into a via. I can't seem to change the slot to assume a VIA personality. Redwire, if you are monitoring, feel free to chime in. Ron Scott
    • Post Points: 5
  • Thu, Feb 20 2014 5:55 AM

    • Yoda5939
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    Re: Custom Vias Reply

    Here's the promised pict.Apparently my written part of the post went south. As you can see on the pict, the center pin has contact and the outer two have none, I used a dynamic shape to check and the shape cleared the two outer slots. I know the problem is related to the two outer slots have to be identified as VIA rather than a mechanical slot. All three slots have there origin from the same padstack, only the center pin is a PIN. All three slots have to tie together only the PIN having a pin number. Everyone may chime in this problem. Thanks.

    Ron Scott 


    • Post Points: 20
  • Thu, Feb 20 2014 9:42 AM

    • chads108
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    Re: Custom Vias Reply

     Are you placing the outer two slots as vias in the footprint, or mechanical pins?  If you want the attributes of a via (which you do), they will need to placed as a via in your footprint.  That should take care of your problem.

     Chad

    • Post Points: 20
  • Thu, Feb 20 2014 10:02 AM

    • Yoda5939
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    Re: Custom Vias Reply
    I thought so, now the additional question. How do I place the pins as VIA in the symbol? Ron Scott
    • Post Points: 20
  • Thu, Feb 20 2014 10:15 AM

    • chads108
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    Re: Custom Vias Reply

    Simple as adding it to your via list in CM.  It then becomes an available via for routing.  Act like you are going to route in the pad shape, right click and place the via.

    • Post Points: 20
  • Thu, Feb 20 2014 11:18 AM

    • chads108
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    Re: Custom Vias Reply

    I should add that is is not a very safe way to do this with thru-hole footprints.  Because you are defining pins as via, at the board level those vias are treated as vias and can be deleted or moved without warning.  If you use this method, you might want to immediately fix the vias of your symbol after you get it placed where you want it.

    The safest method would be to define them all as pins and reflect that in the schematic.

    • Post Points: 5
  • Fri, Feb 21 2014 10:41 AM

    • Yoda5939
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    Re: Custom Vias Reply

    Chad, Your suggestion turned out to be the answer. I placed the two slots and laid a shape on top & bottom as well as appropriate solder mask.  The EMA AE say you can't put down a dynamic shape in the symbol but the shape will take on the characteristics of the net you are trying to stitch together. Apparently, he's right. I placed in my .brd, no problem.

    Ron Scott 

    • Post Points: 5
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Started by Yoda5939 at 10 Feb 2014 11:20 AM. Topic has 8 replies.