In this paper, in the first place the mathematical model of the feed drive system of the NC planer type miller is built up.

本文首先建立了数控龙门铣床进给传动链的数学模型。

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The tooth side slack of the gear influences the machining accuracy of NC machine tool directly, so, taking out the slack of feed drive gearing is an important item in the machine tool rebuilding.

齿轮的齿侧间隙直接影响数控机床的加工精度，因此，进给系统传动间隙的消除是机床数控改造的一项重要内容。

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