Multiple system numerical control device

A multiple system numerical control device for executing multiple system control for dividing plural axes to be controlled to plural systems and controlling each system based on different machining program in parallel, the multiple system numerical control device including a programmable controller, wherein

• the plural systems includes a normal interpolation period system configured to operate at normal interpolation period and control a first control axis, and a high speed interpolation period system configured to operate at high speed interpolation period shorter than the normal interpolation period and control a second control axis,
• the normal interpolation period system comprises:
• a first command analysis unit configured to analyze a first machining program and generate a first command data;
• a first interpolation processing unit configured to execute interpolation processing based on the first command data and generate a first interpolation data;
• a first coordinate update processing unit configured to update coordinate value of the first control axis based on the first interpolation data;
• a first acceleration/deceleration processing unit configured to execute acceleration/deceleration processing based on the coordinate value of the first control axis and generate a first acceleration/deceleration data;
• a data management information generation unit configured to generate data management information representing status of the normal interpolation period system based on at least one of the first command date, the first interpolation data, and the coordinate value of the first control axis;
• and
• a data management information storing unit configured to store the data management information;
• and
• the high speed interpolation system comprises:
• a second command analysis unit configured to analyze a second machining program and generate a second command data;
• a second interpolation processing unit configured to execute interpolation processing based on the second command data and generate a second interpolation data;
• a second coordinate update processing unit configured to update coordinate value of the second control axis based on the second interpolation data;
• and
• a second acceleration/deceleration processing unit configured to execute acceleration/deceleration processing based on the coordinate value of the second control axis and generate a second acceleration/deceleration data;
• wherein
• the programmable controller is configured to output a signal to control operation of the second command analysis unit, the second interpolation processing unit, the second coordinate value update processing unit, and the second acceleration/deceleration processing unit to the high speed interpolation system based on the data management information stored in the data management information storing unit, and
• processing in the normal interpolation period system executed in the first interpolation processing unit, the first coordinate update processing unit, and the data management information generation unit are executed plural times in a normal interpolation period according to system ratio of the normal interpolation period and the high speed interpolation period.