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Creating symbol package in PCB Editor

Olek

Where symbol package (footprint) origin (datum) should be placed?

I decided to be consistent and I place it always at pin 1 of the footprint for both through hole and SMD footprints.

 Is it the best location?

I understand that the origin location matters when selecting or moving footprint on a board.

How footprint origin location effects generation of pick and place machine coordinates?

Does origin location matters in this case?

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  • mcatramb91

    Hello,

    Using Pin 1 for the symbol origin on Thru Components is normally a good thing to do but I would recommend using the centroid or center point for SMD Components. Certainly, being consistent is always the best way to go.

    For the most part the origin location doesn't really matter too much in regards to the Pick and Place machine coordinates.  The body center information is driven by the calculated center point of the shape defined on Package Geometry > Place_Bound_Top but this can be overriden by defining the component centroid using Package Geometry > Body_Center, normally by adding a text sting like a period "," at the desired center point.  This will give you a consistent location vs. a calcuated one for your pick and place centroid point and it can be easily extracted to generate Pick and Place data.

    Hope this helps,
    Mike Catrambone

Reply
  • mcatramb91

    Hello,

    Using Pin 1 for the symbol origin on Thru Components is normally a good thing to do but I would recommend using the centroid or center point for SMD Components. Certainly, being consistent is always the best way to go.

    For the most part the origin location doesn't really matter too much in regards to the Pick and Place machine coordinates.  The body center information is driven by the calculated center point of the shape defined on Package Geometry > Place_Bound_Top but this can be overriden by defining the component centroid using Package Geometry > Body_Center, normally by adding a text sting like a period "," at the desired center point.  This will give you a consistent location vs. a calcuated one for your pick and place centroid point and it can be easily extracted to generate Pick and Place data.

    Hope this helps,
    Mike Catrambone

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