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Another Datum Target Points Disaster Print

Lukas
Good morning all,

I am looking for some input on how you would program this. Datum A is the midplane of the part using target points at specified locations from Datum B. It doesn't help that Datum C makes zero sense hah, so I left it off of my drawing. I am pretty lost in terms of how to do this correctly (iterative alignment?)...at this point I'm am considering just making planes (with many hit points) and a midplane for Datum A.
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  • Datum A would be a width rather than a mid-plane. However, you wouldn't be able to create either of them because you only have 2 points on each datum A surface - you need a minimum of 3 for a plane. Assuming you were able to add a 3rd hit on each datum A surface, the width would constrain 3 degrees of freedom (2 rotations and 1 translation).

    Datum B is a cylinder, perpendicular to datum A and would therefore constrain the remaining 2 translational degrees of freedom.

    This would leave C (which you do not show because you claim it does not make sense?) which would need to constrain the last remaining rotational constraint.
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  • Datum A would be a width rather than a mid-plane. However, you wouldn't be able to create either of them because you only have 2 points on each datum A surface - you need a minimum of 3 for a plane. Assuming you were able to add a 3rd hit on each datum A surface, the width would constrain 3 degrees of freedom (2 rotations and 1 translation).

    Datum B is a cylinder, perpendicular to datum A and would therefore constrain the remaining 2 translational degrees of freedom.

    This would leave C (which you do not show because you claim it does not make sense?) which would need to constrain the last remaining rotational constraint.
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