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Issue with disappearing thermals and overlapping pads

Former Member

I'm designing a small board which is meant to be flexible in the choice of components. I have two SMD capacitors of a different size but connected to the same nets, and only one of them are to be populated in a single board.

 

One pad is connected to a ground plane with thermals, but when I place both components so that the pads overlap eachother, the thermals disappear. I took two screenshots to illustrate the problem I'm having more clearly:

 

http://www.natrox.org/img/el/eagle-thermal-bug.png

 

This is not an immediate problem and is easy to solve manually, but it may be something you would like to look in to in a future release.

 

Kind regards,

Anders

Parents

  • On 2/15/2013 9:18 AM, Anders Andersson wrote:

    I'm designing a small board which is meant to be flexible in the choice of components. I have two SMD capacitors of a different size but connected to the same nets, and only one of them are to be populated in a single board.

     

    One pad is connected to a ground plane with thermals, but when I place both components so that the pads overlap eachother, the thermals disappear. I took two screenshots to illustrate the problem I'm having more clearly:

     

      http://www.natrox.org/img/el/eagle-thermal-bug.png

     

    This is not an immediate problem and is easy to solve manually, but it may be something you would like to look in to in a future release.

     

    Kind regards,

    Anders

     

    --

    To view any images and attachments in this post, visit:

    http://www.element14.com/community/message/69607#69607/l/issue-with-disappearing-thermals-and-overlapping-pads

     

    Hi Anders,

     

    Thank you for your comment, but this isn't a normal use case. I'm sure

    if you run the DRC now there will be a couple of errors generated by

    placing parts directly on top of each other. The first image is what we

    would recommend as the best practice, something else you could is modify

    the silkscreen and just use one set of pads in this case the larger set.

     

    hth,

    Jorge Garcia

    Cadsoft Support

     

Reply

  • On 2/15/2013 9:18 AM, Anders Andersson wrote:

    I'm designing a small board which is meant to be flexible in the choice of components. I have two SMD capacitors of a different size but connected to the same nets, and only one of them are to be populated in a single board.

     

    One pad is connected to a ground plane with thermals, but when I place both components so that the pads overlap eachother, the thermals disappear. I took two screenshots to illustrate the problem I'm having more clearly:

     

      http://www.natrox.org/img/el/eagle-thermal-bug.png

     

    This is not an immediate problem and is easy to solve manually, but it may be something you would like to look in to in a future release.

     

    Kind regards,

    Anders

     

    --

    To view any images and attachments in this post, visit:

    http://www.element14.com/community/message/69607#69607/l/issue-with-disappearing-thermals-and-overlapping-pads

     

    Hi Anders,

     

    Thank you for your comment, but this isn't a normal use case. I'm sure

    if you run the DRC now there will be a couple of errors generated by

    placing parts directly on top of each other. The first image is what we

    would recommend as the best practice, something else you could is modify

    the silkscreen and just use one set of pads in this case the larger set.

     

    hth,

    Jorge Garcia

    Cadsoft Support

     

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