Abstract
As technology advances, the demands for precise industrial product manufacturing increase. Consequently, measuring instruments have also improved in accuracy. To ensure that the measurement accuracy of the three-coordinate measuring instrument meets modern industrial manufacturing’s precision measurement requirements, the quantity traceability method is proposed to improve the measurement accuracy of angle error. And the geometric error compensation method is used to improve the measurement accuracy of the coordinate measuring instrument. By establishing a complete, accurate, and reliable traceability chain, the coordinate measuring instrument has traceability and calibration functions. Error compensation improves the geometric error in the coordinate measuring instrument through operation command correction. The results showed that the phase relationship of the measurement error of the self-calibrating encoder was basically consistent with the design value. Compared to the R1 reading head, the deviation value of the R6 reading head was the smallest, at 0.1°. The deviation value of the R4 and R5 reading heads was larger, at 0.4° compared to the R1 reading head. The deviation values of the R2 and R3 reading heads compared to the R1 reading head were 0.3° and 0.2°, respectively. The precision error compensation model had a higher degree of error identification and accuracy. In measuring errors in the three axes, the outcomes of the traditional error model show greater variability as the displacement increases. The method of error compensation in the measurement system effectively improves accuracy by reducing errors. This method not only proves the feasibility of accuracy improvement but also provides guidance for further enhancements of the measurement system’s accuracy.
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