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EAGLE User Support (English) Best way to do an odd shaped through-hole pad?
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Related

Best way to do an odd shaped through-hole pad?

bill.french
bill.french over 9 years ago

I'm new to Eagle, trying to design a device in Eagle, (IRFP4468, a high power mosfet) ... i want the pads like the picture below.  I drew them using polygons on the "pad" layer, around a square pad.

 

How can I specify the connection point?  Right now it wants to connect at the circle, which screws up what I'm trying to accomplish.  (second picture)

 

I'm sure I'm going about this all wrong, but i can't figure out what I should do.  Any pointers?

image

image

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  • rachaelp
    0 rachaelp over 9 years ago

    Hi Bill,

     

    What you are doing is correct but you are right it will put the connection point in the centre of the through hole pad. I'm not sure why this is a problem though. Maybe it might help if you told us what you were trying to achieve that this is causing problems with? We might them be able to offer you an alternative solution.

     

    Best Regards,

     

    Rachael

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  • bill.french
    0 bill.french over 9 years ago in reply to rachaelp

    In the second photo, i drew a .25" trace ... it is round on the end, and thus interferes with the pad to the right.  If I coudl set the connection point a little "north" ... that curvature would be buried in the green.

     

    image

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  • rachaelp
    0 rachaelp over 9 years ago in reply to bill.french

    Ah yes, I see it now, my laptop changes the colour temp of its display at night and so that trace looks almost black against the black background so I didn't notice....

     

    So you could bring the 0.25" trace into the pad but click to place the end of that segment just into the pad and then change the width of the final segment to be smaller so it doesn't spill over the pad and into the one next to it. Does that make sense?

     

    I'm assuming you are routing manually here and not relying on the autorouter.

     

    Best Regards,

     

    Rachael

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  • bill.french
    0 bill.french over 9 years ago in reply to rachaelp

    Hmmm.. that did seem to work ok.  Is there any issue that it's not really "fully connected"?  I have to export gerbers and see if there's anything screwy there, too.

     

    Thank you very much for you help.  Please let me know if anything else occurs to you!

     

    image

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  • rachaelp
    0 rachaelp over 9 years ago in reply to bill.french

    Hi Bill,

     

    Just finish it off with a thinner trace to make your 0.25" trace meet the connection point in the pad then there won't be any remaining air wires.

     

    Best Regards,


    Rachael

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  • bill.french
    0 bill.french over 9 years ago in reply to rachaelp

    Ah, gotcha, I understand now.  Gerbers seem to check out ok, so imma mark this solved.  Thank you!

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