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Thread: Gd&t true position with basic angle

  1. #1
    Associate Engineer
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    Feb 2018
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    Gd&t true position with basic angle

    Ca anyone assist with explaining how you would verify the true position attached to the .168 dimension. I understand standard true position with typical x,y coordinates but cannot wrap my head around this one.
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  2. #2
    Administrator Kelly Bramble's Avatar
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    Feb 2011
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    What measuring equipment do you have? CMM?, surface plate and height gage? A sine plate will be useful to rotate the part from Datum A and B.
    Tell me and I forget. Teach me and I remember. Involve me and I learn.

  3. #3
    Associate Engineer
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    Feb 2018
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    we have a micro vu, vision inspection system. I also have conventional inspection methods available (height gage, surface plate, etc)

  4. #4
    Once your established AB alignment is rotated by fixed 60 degrees, any point of the the axis of .168 feature has to lie within .005 cylindrical zone.

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