| 摘要 |
A numerical control unit and method of operation therefor which pre-announces scheduled parts ordering, maintenance, loading, unloading and inspection times by display or audio notice to an operator. On the basis of a programmed control of the machine in block form and a reference time of day (including day, week, month, year etc.) generated by a clock, time related information is stored and the time for performance of time-related events are calculated. The stored time-related information can include (i) the expected run time for the entire machining program or for a portion of the program until the occurrence of a specific program event, such as the execution of a specified command; (if) the expected schedule times for machine operation and inspection events, such as power-on/off, run start, cutting start, etc.; and (iii), the messages related to operational events and machine conditions. The calculated information can include the expected end times for an entire run, for the occurrence of a specified command, for machine operation and inspection events, determined on the basis of the current time of day and the actual execution of the machine operation. The calculated information is updated with machine operation and is used as the basis for reading and displaying/announcing messages concerning the machine condition.
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