| 摘要 |
PROBLEM TO BE SOLVED: To provide a numerical controller for machine tool, which can appropriately and speedily advance a work program for every block and can improve the production efficiency. SOLUTION: When the rotary operation command for a rotary tool is included in a command from a main control part 81, a PLC 91 performs a sequence program 94b, sets the counting time in accordance with the rotary speed of the rotary tool designated by the rotary operation command and outputs the rotation start signal of the rotary tool to an inverter circuit for rotary tool rotation/driving motor 62. The PLC 91 starts clocking to counting time which is set in a programmable timer 96 and outputs a block termination signal (MFIN) to the main control part 81 by adjusting it to the termination of clocking. When the block termination signal (MFIN) is outputted from the PLC 91, the main control part 81 reads next one block from a work program 85a and performs an operation command decided by one block.
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