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介绍了一种对数控机床运动精度进行诊断 (运动误差－单项综合－误差分离 )的有效方法；通过使用双球规 (DBB)对数控机床进行运动误差信号采集，并对采集到的信号进行分析，完成对数控机床运动误差的分离。
An effective method to diagnose the motion accuracy of CNC machine tools (motion error - single synthesis - error separation) is introduced. Motion error signal acquisition is carried out on CNC machine tools by using double ball gauge (DBB), and the collected signals are analyzed , To complete the CNC machine tool motion error separation.