If an encoder offering accurate angles of the workpiece rotation was installed on the spindle,then the off-axis aspheric surfaces can be machined by employing cylindrical coordinate machining method.

• 在用来加工轴对称非球面的二轴联动超精密数控机床的工件主轴上安装可以精确给出旋转角度的码盘,采用柱坐标加工方式进行离轴非球面的超精密磨削加工。