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Article | REF: R1312 V1

Technology and use of coordinate measuring machines

Authors: Pierre BOURDET, Claire LARTIGUE

Publication date: June 10, 2017

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4. Controlling geometric defects on a CMM

Controlling geometric defects on a CMM involves limiting variations, modeling them, identifying them through calibration, and then compensating for them digitally.

Geometrical faults in a CMM result from faults in the machine's various guideways, faults in the displacement measurement rules, faults in the orientation of the machine axes, and the behavior of the probing system and measurement trigger electronics.

4.1 Limiting variations in CMM geometrical defects

By design, CMMs are designed to ensure the most repeatable movements possible, with electronics that give priority to the reading of displacement measurement rules.

Friction in guideways and the phenomenon of hysteresis when changing direction are limited...

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Controlling geometric defects on a CMM
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