The whole digit-controlled lathe of lower prices generally choose stepping drive unit price is higher, and the machinetool selection servo drive unit.
整台数控机床价格较低的一般选择步进驱动单元，而价格较高的机床选择伺服驱动单元。
2
The whole sets nc machine tools of lower prices generally choose the stepping driving unit and the price higher machinetool selection servo drive unit.
整台数控机床价格较低的一般选择步进驱动单元，而价格较高的机床选择伺服驱动单元。
3
The tooth side slack of the gear influences the machining accuracy of NC machinetool directly, so, taking out the slack of feed drive gearing is an important item in the machinetool rebuilding.