针对传统机床直线进给系统在某些场合下存在体积大、安装调试难度高、系统动态性不好的问题，提出了用种新型步进电机控制直线运动的方法.该电机的特点是电机轴中空，丝杠可以直接穿过电机抽;在该电机控制的直线运动系件，丝杠一般不动，电机在丝杠上平动，从而使运动系统具有安装调试方便、体积小、动态响应特性好等特点.夫健词:步进电机;直线运动;数控机床(MechanicalE ngineeringD ept.CQU.Chongging.China4 000303AbstraminS omec ase,t raditionaln umericalco ntorlm achineto olis o fh ugeb ulk,unconvenientfix 吨,lowd ynamic response,so we work out a new method of linear movement controlled by a new kind of step motor.The main character of the motor is that it has a hollow axis through which a screw can thread.In the movement system controlledb yth em otorlthe s crewi su suallyf ixed,andth em otorco uldm oves traighton th es cerw.Thesy stemh asth e advantageo fco nvenientfi xing,smallbu lc,andh ighd ynamicre sponse.Keywords:stepm otor;linearm ovement;numericalco ntrolm achineto ol