Best fit perpendicular plane

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  • Best fit perpendicular plane

    I have had the pleasure of attending a basic class in GD&T.
    I have been instructed as such:
    Datum B, if a plane feature, is to be constructed as a best fit plane, perpendicular to datum A.
    I typically construct a line from a planer surface for datum B. This, I find out is probably not a good interpretation of the drawing.
    What technique do use to accomplish this best fit perp plane?
    This also brings me back to a previous post concerning rotation to a planer surface used in the alignment.
    Ideas, comments ?
    ["Paper is poverty,... it is only the ghost of money, and not money itself." --Thomas Jefferson ][/SIGPIC]

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