18-06-2012, 02:49 PM
Coordinate-measuring machine
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A coordinate measuring machine is a 3D device for measuring the physical geometrical characteristics of an object.
This machine may be manually controlled by an operator or it may be computer controlled.
Measurements are defined by a probe attached to the third moving axis of this machine.
Probes may be mechanical, optical, laser, or white light, amongst others.
Description
The typical 3 "bridge" CMM is composed of three axes, an X, Y and Z.
These axes are orthogonal to each other in a typical three dimensional coordinate system.
Each axis has a scale system that indicates the location of that axis.
The machine will read the input from the touch probe, as directed by the operator or programmer.
The machine then uses the X,Y,Z coordinates of each of these points to determine size and position with micrometer precision typically.
Parts
Coordinate-measuring machines include three main components:
-The main structure which include three axes of motion
-Probing system
-Data collection and reduction system - typically includes a machine controller, desktop computer and application software.