There are three types of shaft misalignment, namely in terms of parallel misalignment, angular misalignment and shaft end-play.

轴的偏差有三种，分别是径向偏差、角向偏差和轴向偏差。

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According to this model, the parallel misalignment and angular misalignment can be calculated so long as light spot coordinate of PSD at two discretionary angles is measured.

据此模型，只要测量出任意两个角度时光斑在PS D上的坐标，即可求出两轴的径向偏差和角度偏差。

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