Brake inspection apparatus and numerical control apparatus for inspecting brake device

A brake inspection apparatus for inspecting a brake device that brakes a motor by pressing, by an elastic force of a spring, an armature against a friction plate connected to a motor shaft, and cancels braking on the motor by separating the armature from the friction plate by an electromagnetic force generated by supplying a brake coil current to a brake coil, the apparatus comprising:

• a command unit configured to, in an inspection mode, command the brake device to brake the motor, and further command a motor current supply unit to gradually increase a motor current supplied to the motor by a predetermined step size;
• a brake torque measurement unit configured to measure a brake torque immediately before the motor starts to rotate, when the motor current supplied from the motor current supply unit is gradually increased based on a command from the command unit;
• and
• a brake torque drop curve calculation unit configured to calculate a brake torque drop curve representing a relationship between the brake torque and an operating time of the brake device, based on the brake torque comprising a plurality of brake torques measured by the brake torque measurement unit in the inspection mode comprising a plurality of inspection modes set for different periods.