Numerical controller and machining system

A numerical controller for use in a machining system including a rotary table device that has a table, a drive mechanism for rotating and positioning the table around an axis, and a clamp mechanism for restricting rotation of the table, the numerical controller being adapted to control the rotary table device according to a machining program containing a plurality of instruction statements and comprising:

• an unclamp adding unit that adds an unclamp operation for releasing restriction of the table immediately before execution of a table rotation instruction statement that is contained in the machining program to designate an operation of the drive mechanism;
• and
• a clamp adding unit that adds a clamp operation for restricting the table immediately after execution of the table rotation instruction statement, wherein the numerical controller is capable of executing, in a same machining program, the clamp operation and the unclamp operation by a clamp instruction statement contained in the machining program to designate an operation of the clamp mechanism, the unclamp operation by the unclamp adding unit, and the clamp operation by the clamp adding unit.