2. • CMM (Coordinate Measuring Machine) is an advanced
machine works for measure complex and measurement
large component.
• CMM is a device for measuring the physical
characteristics of an object.
• The machine is controlled by a computer or an operator.
• CMM consists of 3 axis namely, X-axis, Y- axis, Z- axis.
• Measurement is done by the Prob attached to third
moving axis.
• This Prob could be Mechanical, Optical, Laser or White
Light.
3. • The basic version of a CMM has three mutually
perpendicular directions.
• Thus the work volume is cuboidal. A carriage is provided for
each axis, which is driven by a separate motor.
• While the straight line motion of the second axis is guided
by the first axis, the third axis in turn is guided by second
axis. The third axis carries probe.
• When probe makes contact with the work piece, the
computer captures the displacement of all the axes.
• Depending on the geometry of the work piece being
measured, the one can choose any one among the five
popular physical configurations.
