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Custom SMD in Eagle 9.1.0

rgaillard

I have been following these guides for making a custom smd layout:

 

https://www.autodesk.com/products/eagle/blog/what-you-didnt-know-about-eagle-arbitrary-pad-shapes/

 

https://www.youtube.com/watch?v=_G0ikZKB_Ss

 

And also these guides:

 

Library Basics Part 1: https://www.autodesk.com/products/eagle/blog/library-basics-part-1-creating-first-package-autodesk-eagle/

Library Basics Part 2: https://www.autodesk.com/products/eagle/blog/library-basics-part-2-creating-first-symbol-autodesk-eagle/

Library Basics Part 3: https://www.autodesk.com/products/eagle/blog/library-basics-part-3-creating-first-device-autodesk-eagle/

 

After following these guides I placed my part on a board. However I cannot route to the custom smd pads.  I repeated the process with unmodified smds, but I still can't route to the custom library part. Based on this, I'm guessed that whatever it is that I am doing wrong is covered in the Library Basics tutorials. However, I have started fresh twice following the tutorials but I still can't get it to work. I also followed the tutorials and made the same part as in the tutorials but I can't route to the tutorial part.

 

It looks like I am not allowed to attach the library file, so I will briefly describe what I did for my custom smd (omitting some details).

 

     First, I made the footprint by placing two smds on the top layer with the smallest default size from the size drop down menu. I renamed the smds with numbers 1 and 2. Now for the custom smd, I made two arcs in the top layer. Each arc completely covered 1 smd. The arcs do not overlap each other. I then made two more sets of arcs for tstop and tcream. Finally, I made name and value placeholders in the appropriate layers. From there I made the symbol and device making sure to connect the pins and pads.

 

I have attached an image of what the part looks like when placed it on a board (there are 2 parts in this image).

 

Thanks,

Randy

 

Message was edited by: Randy Gaillard

Attachments:
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echo_electrode_arc_1mm_200um.zip
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  • Hi Randy,

     

    I see the custom pads are showing DRC errors from the Live DRC. I'm assuming you are using walkaround routing mode in which case the reason you cannot route into these pads is because in walkaround mode you cannot violate DRC, it will not let you. You need to look at why it's throwing a DRC error and fix it or change the routing mode to the non-walkaround variant to allow you to route these in manually.

     

    Best Regards,

     

    Rachael

Reply

  • Hi Randy,

     

    I see the custom pads are showing DRC errors from the Live DRC. I'm assuming you are using walkaround routing mode in which case the reason you cannot route into these pads is because in walkaround mode you cannot violate DRC, it will not let you. You need to look at why it's throwing a DRC error and fix it or change the routing mode to the non-walkaround variant to allow you to route these in manually.

     

    Best Regards,

     

    Rachael

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  • in reply to rachaelp

    Thanks for the reply Rachael.

     

    I do get overlap errors, but I'm not sure what to make of that. My understanding is that Eagle should consider the custom pads to be an extension of the initially placed smds as long as the initial smds are completely covered by my custom shapes.

     

    When I use the part that I made from the Library Basics tutorials, I don't get any DRC errors, but I still can't route to the pads for that part.

     

    Thoughts?