Abstract: A controller of a motor that drives a driven body, the controller includes: a command generating unit that generates a movement command for the motor; an inertia estimating unit that acquires feedback information of the motor and estimates an inertia on the basis of a predetermined estimation equation; a difference computing unit that computes a change in the inertia changed with machining based on the movement command of the command generating unit; and a comparing unit that compares a difference between the estimation results before and after the machining of the driven body estimated by the inertia estimating unit and the change in the inertia computed by the difference computing unit. the estimation equation of the inertia estimating unit is corrected on the basis of a comparison result of the comparing unit so that the difference between the estimation results matches a computation result obtained by the difference computing unit.

Abstract: A controller of the present invention for a drive mechanism which is driven by a plurality of motors includes a position command calculation unit and a torque command calculation unit, the position command calculation unit delivers a common position command value to each of the motors and the torque command calculation unit switches, according to the operation state of the drive mechanism, between individualization control for individually performing the output of an integral element of the torque command calculation unit to each of the motors and sharing control for sharing the output of the integral element of the torque command calculation unit to the motors.

Abstract: A production management device is communicably connected to a plurality of slave control devices respectively connected to a plurality of machine tools, and also communicably connected to a master control device for preparing an overall operation plan of the plurality of machine tools. The production management device acquires data on a machine type and an operation condition of each of the plurality of machine tools from the slave control device. The production management device selects, on the basis of the data, an alternative machine tool to be substituted for a specific machine tool from among the plurality of machine tools. Furthermore, the production management device substitutes the alternative machine tool for the specific machine tool.

Abstract: In a controller of the present invention that controls a drive mechanism driven by a plurality of motors, when a state where the output of the motors is zero shifts to a state where the output is non-zero such that a preload torque is provided by a preload torque superimposition unit, at least one of the motors forms a contact portion between the drive mechanism and the motor by speed control based on a speed detection value detected in a speed detection unit, and in a state where the contact portion is formed, the preload torque is provided by the preload torque superimposition unit.

Abstract: Upon performing diagnosis of a machine tool, etc., data suited to diagnosis is acquired while also reducing the burden on the user. A diagnostic data acquisition system that acquires diagnostic data for diagnosing a machine tool includes: a control unit that controls driving of a mobile part of the machine tool based on control data; a timing generation unit that generates an acquisition timing for the diagnostic data based on the control data; and a diagnostic data acquisition unit that acquires data which varies accompanying driving of the mobile part according to control by the control unit, as the diagnostic data.

Abstract: A servo control apparatus includes a velocity command creation unit; a velocity detection unit; a velocity control gain; a torque command creation unit; a filter configured to attenuate a particular frequency band component in a torque command value; a sine-wave sweep input unit configured to perform a sine-wave sweep in a predetermined frequency range; a frequency characteristics calculation unit configured to calculate a frequency characteristic of a sine-wave; and a filter adjustment unit configured to attenuate a particular frequency band component in a torque command value. A signal is input to the velocity control gain. The signal is obtained by adding a sine-wave to a difference between a velocity command value and a velocity detected. The filter adjustment unit measures an influence of the velocity control gain on a resonance frequency and resonance peak amplitude, while changing a value of the velocity control gain, thereby adjusting the filter.

Abstract: To provide an abnormality monitoring device capable of reducing the size of a mounted device, enabling high-speed response, and achieving high accuracy in detecting abnormality. The abnormality monitoring device includes: at least one filter that extracts state information pertaining to drive of a mechanism of an industrial machine using a motor, as a signal of at least one frequency band; an integrator that integrates an output of the filter in each frequency band; and an abnormality detection unit that detects abnormality based on an integrated value integrated by the integrator. The state information may be control information of the controller that controls the motor or detection information from at least one detector attached to the mechanism.

Abstract: The data management device capable of calculating an evaluation index based on the sensor data includes: a sensor data acquisition unit that acquires the sensor data from one or more sensors installed in an industrial machine; an evaluation index calculation unit that calculates the evaluation index with use of the sensor data; a sensor data storage unit that saves the sensor data; and a sensor data deletion unit that deletes the sensor data when a total volume of the sensor data in the sensor data storage unit exceeds an upper limit. The sensor data deletion unit determines saving priority of the sensor data based on a degree of change in the evaluation index and deletes the sensor data in accordance with the saving priority.

Abstract: A measurement device comprises: an ultrasonic vibrator that emits an ultrasonic wave to a measurement target; an acoustic lens; a sound-receiving element unit; an A/D converter array; a calculator connected to the A/D converter array; and a driving mechanism that makes the measurement target movable or tiltable relative to the ultrasonic vibrator. The calculator stores information in chronological order acquired by the sound-receiving element unit through scanning irradiation with the ultrasonic wave, converts the information stored in chronological order to space information, and acquires an acoustic intensity distribution.

Abstract: A controller can switch a control system of a motor to a diagnostic operation mode in addition to a normal operation mode. Abnormality of the motor can be detected by taking advantage of the appearance of a clear difference between a feedback value detected when the motor is normal and a feedback value detected when the motor is abnormal if the control system is switched to the diagnostic mode.

Abstract: A servo control system includes a position command generator; a position detector of among other things, a feed shaft; a position control loop; a learning controller including a band limiting filter and a dynamic characteristic compensation element; a sine wave sweep input unit for the position control loop; and a frequency characteristic calculator for estimating the gain and phase of position control loop input and output signals. The frequency characteristic calculator calculates an evaluation function that indicates the characteristic of a position control based on the frequency characteristic of the position control loop, the band limiting filter, and the dynamic characteristic compensation element.

Abstract: A servo controller includes a speed command creation unit, a torque command creation unit, a speed detection unit, a speed control loop, a speed control gain, a filter, a parameter storage unit, a sinusoidal disturbance input unit, a frequency characteristics calculation unit, and a parameter adjustment unit. The parameter storage unit stores a history of past frequency characteristics obtained by the frequency characteristics calculation unit in correlation with past parameter history.

Abstract: A servo controller includes a speed command creation unit, a torque command creation unit, a speed detection unit, a speed control loop, a speed control gain, a sinusoidal disturbance input unit, an actual frequency characteristics calculation unit, a reference characteristics changing unit, a reference frequency characteristics calculation unit, and a control gain adjustment unit.

Abstract: A servo control system includes a position command generator, a position detector for a feed axis, a positional deviation obtainer for calculating a positional deviation, a position control loop, a band limiting filter for attenuating a high frequency component of the positional deviation, a dynamic characteristic compensation element for advancing a phase, a learning controller including the band limiting filter and the dynamic characteristic compensation element, a sine wave sweep input unit for applying a sine wave sweep to the position control loop, a frequency characteristic calculator for estimating the gain and phase of position control loop input and output signals, and a learning control characteristic evaluation function calculator for calculating an evaluation function, which indicates a position control characteristic with the learning controller based on a frequency characteristic by actual measurement and a frequency characteristic of the learning controller.

Abstract: In a controller of the present invention that controls a drive mechanism driven by a plurality of motors, when a state where the output of the motors is zero shifts to a state where the output is non-zero such that a preload torque is provided by a preload torque superimposition unit, at least one of the motors forms a contact portion between the drive mechanism and the motor by speed control based on a speed detection value detected in a speed detection unit, and in a state where the contact portion is formed, the preload torque is provided by the preload torque superimposition unit.

Abstract: A controller of the present invention for a drive mechanism which is driven by a plurality of motors includes a position command calculation unit and a torque command calculation unit, the position command calculation unit delivers a common position command value to each of the motors and the torque command calculation unit switches, according to the operation state of the drive mechanism, between individualization control for individually performing the output of an integral element of the torque command calculation unit to each of the motors and sharing control for sharing the output of the integral element of the torque command calculation unit to the motors.

Abstract: A thermal displacement compensation system detects a state quantity indicating a state of an operation of a machine, infers a thermal displacement compensation amount of the machine from the detected state quantity, and performs a thermal displacement compensation of the machine based on the inferred thermal displacement compensation amount, of the machine. The thermal displacement compensation system generates a learning model by machine learning that uses a feature quantity and stores the generated learning model in association with a combination of specified conditions of the operation of the machine.

Abstract: A numerical control system detects a state amount indicating a state of an injection operation of an injection molding machine, generates a characteristic amount that characterizes the state of the injection operation from the state amount, and infers an evaluation value of the state of the injection operation from the characteristic amount. The numerical control system detects an abnormal state on the basis of the evaluation value, generates or updates a learning model by machine learning that uses the characteristic amount, and stores the learning model in correlation with a combination of conditions of the injection operation.

Abstract: A numerical control system detects a state amount indicating a state of machining operation of a machine tool, creates a characteristic amount that characterizes the state of machining operation from the detected state amount, infers an evaluation value of the state of machining operation from the characteristic amount, and detects an abnormality in the state of machining operation on the basis of the inferred evaluation value. The numerical control system generates and updates a learning model by machine learning that uses the characteristic amount, and stores the learning model in correlation with a combination of conditions of the machining operation of the machine tool.

Abstract: A thermal displacement compensation system detects a state quantity indicating a state of a machine, infers a thermal displacement compensation amount of the machine from the detected state quantity, and performs a thermal displacement compensation of the machine based on the inferred thermal displacement compensation amount of the machine. The thermal displacement compensation system generates a learning model by machine learning that uses a feature quantity, and stores the generated learning model in association with a combination of specified conditions of individual difference of the machine.