| 摘要 |
A machining end detecting device detects whether each hole or the like has completely been drilled to its bottom or not, and the latest drilling information is stored in a nonvolatile memory. In the nonvolatile memory are also stored modal data sequence numbers assigned to drilling start position determining blocks and the latest information on a drilling restart position. Upon inputting a drilling restart command from key input means such as a cycle start button, a restart block indexing device indexes, from a numerical control machining program, a restart block necessary for resuming drilling of an unfinished hole or the like on the basis of the sequence numbers and the machining end detection information stored in the nonvolatile memory. A restart positioning device positions a drilling machine at the drilling start position stored in the nonvolatile memory, and a control device causes the drilling machine to restart with the indexed restart block from the specified position. |
