Numerical control system and interference checking assistance method

A numerical control system comprising:

• a numerical controller that causes a plurality of machine elements of a machine tool to move along a plurality of axes based on a movement command and performs an interference check computation between two machine elements that are combined by a predetermined check target set;
• and
• an interference check assistance device that assists the interference check computation,
• the interference check assistance device including
• a first memory configured to store first information for linking each of the axes in the machine tool with a machine element, which moves along a corresponding axis, among the plurality of machine elements,
• a second memory configured to store second information for defining dependency between the axes in the machine tool, and
• a processor configured to extract one or more of the check target set from all combinations of the plurality of machine elements, based on the movement command, the first information, and the second information,
• wherein the processor is configured to:
• specify the axis, along which the machine element moves based on the movement command, as a movement axis,
• classify machine elements linked with the movement axis and an axis subordinate to the movement axis into a dependent machine element group, based on the first information and the second information,
• classify machine elements not belonging to the dependent machine element group among all of the machine elements into a stationary machine element group, and
• extract the check target set by combining the machine elements belonging to the dependent machine element group and the machine elements belonging to the stationary machine element group.