Anchoring Precision: Advanced Metrological Strategies for Primary Datum Plane Establishment on Coordinate Measuring Machines

The integrity of Geometric Dimensioning and Tolerancing (GD&T) specifications hinges entirely upon the stability and accuracy of the Datum Reference Frame (DRF). As the foundation of this framework, the primary datum plane—typically designated Datum A—serves the critical function of establishing the initial orientation and location of a manufactured component in three-dimensional space.