Coordinate Measuring Machine

The measurement of original shape & dimension of an object & their comparison with needed shape and dimensions as explained in part drawing that comes into the broad area of Coordinate Metrology. Evaluations of the location, dimension and geometry and part or the objects are the several components of coordinate metrology. A coordinate measuring machine is an electromechanical system designed to carry out coordinate metrology. A CMM consists of a contact probe, & this contact prob is positioned in three-dimensional (3-D) spaces comparative to the surface of a work-part. In order to get, dimensional data pertaining to the part geometry, x, y, z coordinates of the probe are accurately measured.

In three-dimensional coordinate system, a fundamental CMM is formed of the following components.

1. Probe head and probe,

2. Mechanical structure and displacement transducer,

3. Drive system and control units, and

4. Digital computer system with application software.