Metrology
Coordinate Measuring Machine (CMM)
A programmable measurement system that uses a probe to determine part geometry in a defined coordinate system.
Why it matters
CMMs support repeatable inspection of complex features and GD&T requirements when properly aligned, programmed and controlled.
Related technical topics
Metrology & Quality · Intermediate
Coordinate Measuring Machines (CMMs)
Understand CMM fundamentals, probing, alignment, datum establishment and how inspection programs translate drawing requirements into measured results.
Technical Literacy · Intermediate
Geometric Dimensioning and Tolerancing (GD&T)
Understand how GD&T communicates allowable geometric variation using datums, feature-control frames and standardized controls for form, orientation, location and runout.
Metrology & Quality · Intermediate
Calibration and Gauge Control
Understand how organizations control inspection and test equipment through identification, calibration status, traceability, storage and out-of-tolerance response.