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GD&T question - Position of that slot

pab39
Hey,

I have to help some engineer for his drawings, and i wonder about something.
Here it is:

Admitting i have that part (picture), and the important thing on it is that the slot has to be well centered related to the Ø15 hole.
As the slot is already dimensionned with profile on the drawing, my fist idea would be to add A reference on the hole, and add A datum into the Profile (picture2)
But would this work ? and is this OK related to ASME ?

Someone proposed to add symetry to locate the slot (pisture3) but i guess this does the exact same thing. and btw, is it possible to dimension symetry related to an axis ?

How would you dimension that ?
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  • 1/ Results are different because the datum system is different... ! In the first case, the cylinder is the primary, the secondary have to be parallel to it and minimizes the max distance, the pos 4 defines the mid plane as primary, and calculate a axis parallel to it.
    2/ It seems you use ASME and ISO, so the result is Max - min, and not 2*abs(max) (IMO)
    3/ can you post the code ?
    4/ ...?
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  • 1/ Results are different because the datum system is different... ! In the first case, the cylinder is the primary, the secondary have to be parallel to it and minimizes the max distance, the pos 4 defines the mid plane as primary, and calculate a axis parallel to it.
    2/ It seems you use ASME and ISO, so the result is Max - min, and not 2*abs(max) (IMO)
    3/ can you post the code ?
    4/ ...?
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