| 摘要 |
<p>)In a machine tool having two main spindles (14, 15), a work (18) is gripped by the first spindle and the second spindle controlled by control circuits (19, 20) that include a speed control unit and a position control unit. When the work is to be machined under this condition, digital speed instructions are fed to the two spindles simultaneously from, for example, a numerical controller. On each of the main spindles, a separation device (sw2) is controlled to separate the position control unit from the speed control unit, the synchronised operation mode is set to switch the speed instruction to the position instruction, and the digital speed instructions are processed as position instructions to carry out the same position control.</p> |
