对于垂直度误差的测量一般采用 90°角尺凭经验看光隙进行估测，或是 90°角尺配合塞尺进行测量。采用上述两种测量方法只能进行垂直度的粗测，不能准确地读出垂直度误差的数值，测量的误差较大。 针对上述问题，我们采用了百分表配合 90°角尺在平板上测量的方法，取得了较好 The measurement of verticality error is generally estimated using a 90 ° angle meter with an optical gap, or 90 ° angle with a feeler gauge. Using the above two measurement methods can only be rough measurement of verticality, can not accurately read the value of the verticality error, the measurement error is large. In response to the above problems, we used a dial indicator with a 90 ° angle measuring method on the flat, and achieved better