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I have seen 3d true position (spherical) on a few sheet metal drawings for GM.
Just wanted to say that even IF a feature HAS three Basic Dims to it but is called out as a diametric TP (Two Axis) then I report it as two axis and use the third axis as incomplete or BASIC NO FCF. Usually it is obvious which Datum Axis is insignificant. Sometimes not. But, call me cantankerous if you want, I give them what they ask for and don't care much for second guessing Engineers.
I have seen 3d true position (spherical) on a few sheet metal drawings for GM.
Just wanted to say that even IF a feature HAS three Basic Dims to it but is called out as a diametric TP (Two Axis) then I report it as two axis and use the third axis as incomplete or BASIC NO FCF. Usually it is obvious which Datum Axis is insignificant. Sometimes not. But, call me cantankerous if you want, I give them what they ask for and don't care much for second guessing Engineers.
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