1966年我们对C620—1型车床进行了简易数控改造。在原床身尾部和横向滑板后方分别加装上步进电动机和带有消隙装置的小型齿轮变速箱。经这样改造后成为简易数控车床。 由于纵向和横向丝杠保留了原来的滑动丝杠,摩擦阻力大。为了减小伺服装置的负荷和丝杠磨损。调整机床时,丝杠螺母副间预留小量的间隙。这种间隙 In 1966, we carried out a simple CNC transformation on the C620-1 lathe. On the rear of the original bed and the rear of the transverse skateboard, a stepper motor and a small gear transmission with anti-backlash are respectively installed. After such transformation into a simple CNC lathe. As the vertical and horizontal screw to retain the original sliding screw, friction resistance. In order to reduce the servo device load and lead screw wear. When adjusting the machine, a small amount of clearance is reserved between the lead screw nut pair. This gap