Article | REF: R1318 V1

Control of measuring machines

Author: Jean-Paul MATHIEN

Publication date: January 10, 1995

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4. Measuring geometric errors

Determining one or more of these errors is necessary in the following cases:

  • during initial CMM assembly;

  • after moving the CMM;

  • after a maintenance operation ;

  • when creating or modifying the error correction matrix.

  • Types of geometric error: for a CMM, there are 21 basic parameters:

    • positioning accuracy and hysteresis (1 parameter per axis) 3

    • orthogonality (1 parameter per plane) 3

    • translation: straightness deviations (2 parameters per axis) 6

    • rotation: yaw, pitch, roll (3 parameters per axis) 9

    • Total:...

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Measuring geometric errors