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pin2pin spacing error after symbol rotation

Hossein1357

Hi,

I am using OrCAD 17. I have  defined pin to pin constraint in a way that my symbols don't have any DRC errors. However, if I rotate my symbol I will receive pin to pin spacing error? I am wondering why this happens. Below picture shows those components - symbols -

I would appreciate any help.

Hossein

Parents

  • Hello Hossein,

    It looks like you have a higher resolution in the land pattern, than you have in your PCB database.  Possibly.  Or, it could just be a case of rounding. The constraint cannot be met because the angle of the lands is causing spacing problems due to how Cadence calculates the lands location, based on basic trigonometry.  I think to solve it, you may need to change the constraint value.  Or, you could adjust the land size.  Rotation of design elements can create problems for calculating gaps.  You can also see similar issues with trace/routes that are at any angles other than 0, 90, 180 and 270. 

    Another thing to try is to adjust the accuracy to something beyond 1.  That could work.

    Kory

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  • Hello Hossein,

    It looks like you have a higher resolution in the land pattern, than you have in your PCB database.  Possibly.  Or, it could just be a case of rounding. The constraint cannot be met because the angle of the lands is causing spacing problems due to how Cadence calculates the lands location, based on basic trigonometry.  I think to solve it, you may need to change the constraint value.  Or, you could adjust the land size.  Rotation of design elements can create problems for calculating gaps.  You can also see similar issues with trace/routes that are at any angles other than 0, 90, 180 and 270. 

    Another thing to try is to adjust the accuracy to something beyond 1.  That could work.

    Kory

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