Structure

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Basics of Coordinate Metrology
Unit 7: Structure of Coordinate Measuring Machines

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Learning target: You understand the structure of a (tactile measuring) 3-D coordinate measuring machine (CMM). You know its individual components and the functioning of the length measuring system of the coordinate measuring machine. You know how to distinguish triggering from measuring stylus systems and know about the functioning of both stylus systems. You know the additional components rotary table, stylus system changer, articulating stylus system and scanning device.

Independent of the design, each coordinate measuring machine (CMM) has common components which are necessary for recording the points to be measured. These components are:

Axis guides with measurement scales as basis of the control coordinate system
stylus systems consisting of probe and stylus
Computer with software for controlling and processing and documentation of the measured values
Work holding fixture for fixing the part during measurement
Additional equipment such as rotary table, stylus system changer or articulating stylus system.

In order to repeat the subject-matter of this unit:

Summary

Move the cursor over the individual components
of the coordinate measuring machine and click on the components
to obtain additional information.