ROTATING ANGLE DETERMINATION SYSTEM

PROBLEM TO BE SOLVED: To provide a rotating angle determination system enhancing the reliability of an NC machine tool. SOLUTION: The rotating angle determination system S includes: a machine control part 200 of an NC machine; a rotary scale 180 installed coaxially with a rotary scale 22 for angle detection provided to an NC machine angle detection part 20; a parallel system sequencer part 185 converting the measuring signal of the rotary scale 180 to an angular value; and a rotating angle determination device 100 performing coincidence determination between an angular value from the parallel system sequencer part 185 and an angular value calculated based on the processing information of a workpiece. On receiving a rotating angle determination demand from the machine control part 200, the rotating angle determination device 100 receives an angular value from the parallel system sequencer part 185, determines whether or not the angle difference between the received angular value and a previously calculated angular value is within a tolerance imparted by the processing information, and transmits the determined result to the machine control part 200. COPYRIGHT: (C)2010,JPO&INPIT