| 摘要 |
A controller for a machine tool outputs an operation instruction signal to the machine tool. The machine tool transmits a signal indicating that the instructed operation is compete. The controller determines a response time of operation to be a difference in time between a point in time when the numerical controller outputs an operation instruction signal and a point in time when the numerical controller receives a signal from the machine tool. When the response time of operation exceeds a preset value, the numerical controller determines that a corresponding maintenance component needs to be replaced and informs a user of the need for replacement by means of a display unit. |
