| 摘要 |
PURPOSE:To prevent a numerical control processing device from operating erroneously by comparing a command signal with a displacement signal memorized by a memory device. CONSTITUTION:By conducting a simulative cutting operation in accordance with a command information from a tape reader 24, an entry command signal 80, an address signal 79 and an output pulse from a position detector 33X are entered in a memory device 57. On the occasion of conducting an actual cutting operation, the entry command signal 80 is set to OFF and a read command signal 81 is set to ON, and the output pulses entered at the time of the simulative processing operation are read out in order with progress of the actual cutting operation. A signal 76 from the memory device 57 is compared with an output from a pulse distributor 27 by a comparator 74. An output difference signal is zero as long as these two signals are according with each other, but if they do not accord with each other, a difference signal 77 is put out from the comparator 74, and a stop command signal is given from a stop command signal preparation circuit 63 to a positioning control section 26 so that an entire operation is temporarily stopped. |
