Numerical controller for machine tool

A numerical controller for a machine tool, for executing a machining program in a predetermined execution cycle and executing one or more auxiliary programs from among a plurality of auxiliary programs within the execution cycle, comprising:

• a decoding unit configured to analyze the machining program and the plurality of auxiliary programs;
• a command element extraction unit configured to determine presence or absence of a relationship between the auxiliary programs, based on analysis result of the decoding unit;
• a load computing unit configured to compute a processing time of the machining program and processing times of the plurality of auxiliary programs, based on the analysis result of the decoding unit;
• an execution sequence computing unit configured to compute an execution sequence of the machining program and the plurality of auxiliary programs so as to execute the auxiliary programs that have the relationship with each other within a same execution cycle, responsive to the processing time of the machining program and the processing times of the plurality of auxiliary programs;
• and
• an execution processing unit configured to execute the machining program and the auxiliary programs in accordance with the computed execution sequence.