Liu-de TIAN, Jian-ke ZHAO, Tao WANG, et al. Influence of test equipment pose error on dividing error measurement based on autocollimator[J]. Optics and precision engineering, 2017, 25(9): 2267-2276.
DOI:
Liu-de TIAN, Jian-ke ZHAO, Tao WANG, et al. Influence of test equipment pose error on dividing error measurement based on autocollimator[J]. Optics and precision engineering, 2017, 25(9): 2267-2276. DOI: 10.3788/OPE.20172509.2267.
Influence of test equipment pose error on dividing error measurement based on autocollimator
In order to improve the measurement accuracy of dividing error of encoders
the principle and method to measure dividing error by using angular polygon and autocollimator were introduced
and the error sources were analyzed. According to the measurement principle
coordinate systems of angular polygon and autocollimator were established. Utilizing the method of coordinate transformation
precise mathematical models were deduced for indicating the relationships between dividing error and misalignment errors
such as parallelism error between the angular polygon working surface and the axis of the tested unit
perpendicularity error between autocollimator optical axis and the working surface of angular polygon
parallelism error between vertical wire of the autocollimator and the axis of the tested unit. In order to verify the error models of misadjustment
three experiments were performed in the laboratory
taking the positioning error of a single-axis position turntable as test object. The experimental and theoretical results have good consistency and the maximum deviation was less than 0.9″
which indicate that the error models of misadjustment are applicable to guide dividing error measurement.
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