| 摘要 |
1,247,548. Programmed control of machine tools. ALLEN-BRADLEY CO. Jan.21, 1969 [Feb.29, 1968; Aug.26, 1968], No.3442/69. Heading G3N. A system as disclosed in Specification 1,159,799, wherein a central processor provides control instructions on a time-shared basis to a plurality of remotely located numerically controlled machine tools, as modified in accordance with Specification 1, 247, 547 to provide supervisory control and display circuits, is provided with facilities for gathering data at the central processor from the various machine tool locations for the purpose of preventive maintenance. |
