Geometric Error Measurement and Compensation of Machines

Abstract Methods for geometric error measurement are classified in direct and self-calibration, according to the use of calibrated or uncalibrated standard and to the strategy for the generation of information about errors. A vectorial equation for geometric error description is presented, which is independent from the machine structure. The evaluation of measurement effectiveness is discussed and error compensation methods and strategies are examined. The reasons why software compensation techniques are applied at production level to CMM and not to machine tools are discussed. Some topics for implementation are proposed.

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