| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily set a variation value for varying the rotational speed of a rotary shaft irrespective of an experience level. <P>SOLUTION: An NC lathe 1 includes: a main spindle 3 for loading a workpiece W to be driven by a motor; a variation value setting part 14 for setting the variation amplitude and variation cycle of the rotational speed of the main spindle 3; and an NC device 12 and a main spindle control part 11 for controlling the rotational speed of the main spindle 3 on the basis of the variation amplitude and the variation cycle set by the variation value setting part 14. In the NC lathe 1, the variation value setting part 14 sets the ratio of the variation amplitude and the variation cycle, and simultaneously sets the variation amplitude and the variation cycle on the basis of the ratio. <P>COPYRIGHT: (C)2012,JPO&INPIT |
