Provided is a numerical control system of an industrial machine that makes it possible to eliminate overshoot occurred at the time of stopping, thereby preventing interference of the machine, for example, in a case in which the torque of a motor such as a servomotor used in a feed axis of a machine tool is limited by a command unit of a CNC. A numerical control system of an industrial machine includes a command unit and a control unit configured to control driving of a motor of the industrial machine in accordance with a command from the command unit, and to perform position control by receiving a command of an end point position from the command unit or without receiving a command of the end point position from the command unit, and the control unit includes an in-deceleration torque limit release unit that, in a case of performing torque limitation of the motor, releases the torque limitation only during deceleration.

Provided is a numerical control system of an industrial machine that makes it possible to eliminate overshoot occurred at the time of stopping, thereby preventing interference of the machine, for example, in a case in which the torque of a motor such as a servomotor used in a feed axis of a machine tool is limited by a command unit of a CNC. A numerical control system of an industrial machine includes a command unit and a control unit configured to control driving of a motor of the industrial machine in accordance with a command from the command unit, and to perform position control by receiving a command of an end point position from the command unit or without receiving a command of the end point position from the command unit, and the control unit includes an in-deceleration torque limit release unit that, in a case of performing torque limitation of the motor, releases the torque limitation only during deceleration.

In a numerical controller for controlling acceleration and deceleration on the basis of a stopping distance, a stopping distance calculation module calculates an acceleration for stopping a drive axis with a probe on the basis of a distance that the drive axis with the probe moves from a current velocity to a stopped state when stopping at a maximum acceleration at which a machine tool does not receive shock, and on the basis of a stopping distance at which the probe is not be damaged. An acceleration and deceleration control module calculates a velocity of the drive axis for each of interpolation periods on the basis of the acceleration calculated by the stopping distance calculation module. An interpolating module outputs data that controls the drive axis, on the basis of the interpolation data and the velocity of the drive axis calculated by the acceleration and deceleration control module.