The precision and performance index of ball screw unit determine the positioning accuracy and the resetting accuracy of nc machines, especially its lead error.

它的精度和各项性能直接影响数控机床的定位精度和重复定位精度，特别是滚珠丝杠的导程误差对机床定位精度的影响最为明显。

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This paper presents a high efficient process method of a steep lead tread of coupling screw and studies the profile accuracy by using electronic computer and arrives at the profile error curve.

介绍了一种大导程波形联结螺纹的高效加工方法，借助计算机进行了螺纹牙形的精度分析，得出了齿形误差曲线。

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The result of grinding the ball lead screw shows the error compensation accuracy of the system can be increased effectively by using this method.

磨削加工结果表明，应用该方法可有效提高系统的误差补偿精度。

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