| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform processing without generating chatter vibrations even at reprocessing. <P>SOLUTION: An arithmetical unit pairs rotation speeds before and after the change, and stores them in a storage device in S9 when chatter vibrations are generated in processing, and the chatter vibrations are suppressed from being generated by the change of rotation speeds (S1-S8). When the new processing is performed, and the rotation speed is input in S1, an NC device, in S2, determines whether or not the input rotation speed is in the storage device, that is, the input rotation speed is the same as the rotation speed before the change out of the pair of stored rotation speeds. When the input rotation speed is the same as the rotation speed before the previous change, a main shaft is rotated, in S11, at the rotation speed after the change which is paired with the rotation speed before the change. <P>COPYRIGHT: (C)2012,JPO&INPIT |
