| 摘要 |
A numerical control system which selectively displays the data from a numerical controller (11) and the data from a monitoring device (21) having a TV camera on a display screen. A display switch (41) selects whether the data from the NC unit (11) or the data from the monitoring device (21) should be displayed, and a switching circuit (51) inputs the data (video signal, vertical synchronizing signal, horizontal synchronizing signal) from the unit selected by the display switch to a CRT (31) which displays on the display screen the image that corresponds to the input data. |
