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How can I make a large 0.900 in (23mm) pad diameter for a wirepad?

e14 Contributor

Hello:
I  am trying make a large pad diameter of 0.900 inches, and maximum pad  dia. allowed in Eagle is only 0.51 inches. Is there a work around, or  another way to get a large pad size?

 

I tried making a circle on the same layer as the maximum allowed pad (Pads) that overlapped the pad, but that did not work: It would not connect to a copper pour polygon of the same net name.


Thanks for the help!
Tim

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  • 0

    Tim Economu schrieb:

     

    I  am trying make a large pad diameter of 0.900 inches, and maximum

    pad  dia. allowed in Eagle is only 0.51 inches. Is there a work

    around, or  another way to get a large pad size?

     

    I tried making a circle on the same layer as the maximum allowed pad

    (Pads) that overlapped the pad, but that did not work: It would not

    connect to a copper pour polygon of the same net name.

     

    Don't draw into the PADS layer, draw into the copper layer(s).

     

    Then, a circle cannot be assigned to a signal - but ARCs can, simply use

    two arcs of (say) 180° each.

     

    Tilmann

     

     

  • 0 in reply to e14 Contributor

    Thanks Tilman,

    I tried your method, in the library editor, I made two 180 degree arcs on the top copper layer overlapping the pad on the pad layer.

    Trying to put a copper polygon pour of the same net name in board layout unfortunately does not connect the new copper arc pads to the top copper polygon.image

    I can connect with a trace of course, and simulate a thermal on the pour by hand, but I would like the new pad to look just like a regular pad and connnect to the pour with thermals or without thermals, either way would be fine.

  • 0 in reply to e14 Contributor

    Tim Economu schrieb:

     

    Thanks Tilman, I tried your method, in the library editor, I made

    two 180 degree arcs on the top copper layer overlapping the pad on

    the pad layer. Trying to put a copper polygon pour of the same net

    name in board layout unfortunately  Image:padnotconnectedtopour.JPG

    does not connect the new copper arc pads to the top copper polygon.

     

    a) If you put images in that badly broken webgate, they never appear in

    the original newsgroups or in the other (significantly better working)

    webgate.

     

    b) You didn't mention before that you want to do this within a library

    (i.e. package). The method I described is fine directly in the board. In

    a package, you better draw a round-appearing polygon (outlines also

    built with two ARCs). It will be "merged" with an SMD pad inside (that

    you need for defining the connections).

     

    Tilmann

     

  • 0 in reply to e14 Contributor

    THANKS SO MUCH!!

    In the attached graphic you will see the work around. A polygon can be used but not arcs or circles (strangely enough!).

     

    So thanks again both of you, really appreciate having a new library item for my large pad!image

    Tim

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