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This calculator calculates position tolerances utilizing principles and concepts withinASME Y14.52009 and ASME Y14.5M  1994, Geometric Dimensioning and Tolerancing (GD&T).
For the equations behind this calculator, see:
"Geometric Boundaries"
Interpretation and Application of
Geometric Dimensioning and Tolerancing
Open True Postion Calculator
Negative Tolerance numbers indicate
out of tolerance condition.
This GD&T true position calculator will
convert coordinate measurements to position tolerances.
Two (2) inputs
are required, See the application illustration at bottom of page.
The following are definitions for the elements: Offset (X)  This is the difference between the
basic dimension (Drawing) and the actual measurement of the produced part.
Offset (Y)
 This is the difference between the basic dimension (Drawing) and the actual
measurement of the produced part.
Calculated (ACTUAL) True Position  The calculated positional tolerance
diameter zone. Allowable True
Position  This is the true position tolerance defined/required
(drawing) . (+)
Excess Tolerance  Additional available positional tolerance.
()
Excess Tolerance  Allowed positional tolerance exceed by given
measurements .
Open True Postion Calculator
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