An eccentricity error mathematic model was built up based on the measurement principle of the optical angularencoder and error analysis.
通过对光栅角编码器测角原理和偏心误差产生原因的分析，建立了偏心误差模型。
2
With a collimator and a 23 polyhedron as measuring datum, a set of optical angularencoder 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。
3
Axial motion and misalignment (radial and angular offset) between the encoder shaft and the drive shaft are compensated by the coupling.