The correct value of radial circular run-out error with respect to a single datum axis can not be obtained in the traditional measuring method.

用传统的测量方法不能得到单一基准径向圆跳动误差的准确值。

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With a collimator and a 23 polyhedron as measuring datum, a set of optical angular encoder measuring data, which containing the eccentricity error, was obtained.

以平行光管和23面棱体为基准，得到存在偏心误差的一组光栅角编码器测量数据。

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