Point-to-point NC system is basically a positioning system. Its primary purpose is to move a tool or workpiece from one programmed point to another.
点位数控系统基本上是一个定位系统，其主要目的是将刀具或工件从一个编程点位移至另一个点位。
2
Ball screw unit is the key part of NC machines, and its adoption is an effective measure of improving sensitivity, positioning accuracy and prevention crawl.
滚珠丝杠副是数控机床进给系统的核心部件，采用它是提高进给系统灵敏度、定位精度和防止爬行的有效措施。
3
Rigidity of feed system with ball screw in nc lathe has a major influence on loss of momentum and positioning precision.