Thk Co., Ltd.

Disco Corporation

Shuhei Yamanaka

Toshiyuki Aso

Yuki Nomura

Yoshiyuki Honjo

Taro Miyamoto

Katsuya Iida

Wataru Nakayama

Masatomo Tokuno

Takayuki Kuze

Hideo Saito

Satoshi Takahashi

Junichi Sakai

Satoru Nagai

Yoshinobu Moriyuki

Toshiro Tojo

Hideya Nakayama

Tsuyoshi Inda

Takashi Oshida

Kazuya Horiike

Yukitaka Ikeya

Tadao Yoneta

Takuya Sakamoto

Hiroshi Inoko

An abnormality diagnosis system that diagnoses an abnormality related to each control shaft in equipment in which the plurality of control shafts, each including a motor and an output unit driven by the motor, are incorporated, includes: a plurality of vibration sensors that are provided for the plurality of control shafts, respectively, and that detect vibration occurring in connection with driving of the motor corresponding to each control shaft; a calculation unit that calculates, for each of the plurality of control shafts, vibration levels in a plurality of predetermined frequency ranges, based on vibration information detected by each of the plurality of vibration sensors; and a diagnosis unit that diagnoses an abnormality related to each control shaft, based on a distribution state, across the plurality of predetermined frequency ranges and across the plurality of control shafts, of the vibration levels calculated by the calculation unit.

Abnormality diagnosis system and abnormality diagnosis method

The processing apparatus performs predetermined processing for measurement data transmitted from the sensor, in which the processing apparatus acquires transmission destination information indicating a predetermined area in a server apparatus in an outside in which processed data subjected to the predetermined processing is to be stored, from a relay apparatus that performs relay processing between the processing apparatus and the server apparatus in order to transmit the processed data from the processing apparatus to the server apparatus, when the relay apparatus is communicatively connected to the communication unit in a state before building of a network between the processing apparatus and the server apparatus, and generates, after the acquisition of the transmission destination information, transmission-processed data in a form in which the relay apparatus is able to execute the relay processing, by adding information relating to the predetermined area indicated by the transmission destination information to the processed data.

Processing apparatus, processed data collection method and data collection system

An object of the present invention is to preferably detect the failure accompanied with the decrease in the pre-load in a ball screw unit. The failure diagnosis is performed for the ball screw unit on the basis of a combination of a resonance frequency in an axial direction of a predetermined machine assembly including the ball screw unit and a motor and a position of a nut member on a screw shaft corresponding to the resonance frequency as provided when the screw shaft is driven and rotated by the motor.

Diagnosis system for ball screw unit and motor control system

A control device for controlling a linear actuator having a linear motor and a brake device includes a magnetic pole position estimation means to estimate which of a plurality of sections obtained by dividing a magnetic pole position of 0&#xb0; to 360&#xb0;, the mover is located in on the basis of a direction of movement of the mover by pulse energization, a magnetic pole position setting means to perform direct current excitation at an estimated magnetic pole position estimated by the magnetic pole position estimation means and set the estimated magnetic pole position as a magnetic pole position of the mover, and a brake control means to turn on a brake device before pulse energization by the magnetic pole position estimation means is performed and turn off the brake device after the magnetic pole position estimation means estimates the section in which the mover is located.

Device and method for controlling linear actuator

A fault detection sensor-equipped actuator is provided which can easily detect a fault in at least one of a linear guide unit and a ball screw unit, using a shared sensor. In an actuator () including a linear guide unit () that guides linear movement of a movable body () and a ball screw unit () that drives the movable body () in an axial direction of a screw shaft (), a sensor () configured to detect a fault in the actuator () is placed in a housing () where a coupling () that couples the screw shaft () and a motor () for rotating the screw shaft () is housed.

Fault detection sensor-equipped actuator and method for detecting fault in actuator

Provided is a state diagnosis system, which is applied to a rolling guide device in which a moving member including an endless circulation path for rolling elements is freely movable along a track member, and which is configured to appropriately recognize a state of a rolling surface of the track member. The state diagnosis system includes: a sensor configured to detect a physical quantity exhibited when the moving member is moving along the track member; a signal processing unit configured to process an output signal from the sensor to output analysis data; and a determination processing unit configured to compare the analysis data with threshold value data to determine whether or not the rolling guide device has an abnormality. Further, when a cycle at which each of the rolling elements, which moves back and forth in the endless circulation path, enters a loadpath from a no-loadpath is represented by t, a data collection time period T, for which the signal processing unit takes in the output signal from the sensor, is set to satisfy T&#x2265;t.

Condition diagnosing system for rolling guide device

A position detection apparatus is provided which eliminates the necessity of space to affix a scale to a track member. A track member of a motion guide apparatus is provided with a through hole into which a fastening member to fasten the track member to a base can be inserted. A carriage that is movably assembled to the track member via a rolling element is provided with magnets generating a magnetic field toward the track member. Magnetic sensors that detect a change in the magnetic fields of the magnets with the travel of the magnets relative to the track member are placed within the magnetic fields of the magnets.

Position detection apparatus and motion guide apparatus with position detection apparatus

A linear motor device includes a linear motor and a controller that applies pressure to a pressurizing target by moving a needle provided with the linear motor. The controller includes: a speed-change position-setting unit that calculates a deceleration start position, which is a position where a movement speed of the needle starts to be reduced from a first speed to a second speed when the pressurizing target start to be pressurized, based on a distance required to reduce the movement speed of the needle from the first speed to the second speed which is lower than the first speed and at which pressure applied to the pressurizing target when the needle comes into contact with the pressurizing target is equal to or lower than a predetermined pressure; and a position determination unit that drives the needle of the linear motor at the first speed and at the second speed.

Linear motor device and control method

This linear motor apparatus includes: a first linear motor and a second linear motor, movable bodies of which move in the same direction in a linked manner; a first control portion that causes the first linear motor to produce thrust to apply a load to a pressurizing target via the movable bodies; and a second control portion that causes the second linear motor to produce thrust and controls the thrust, wherein, if the first control portion is causing a load to be applied to the pressurizing target, then the second control portion causes the second linear motor to produce thrust that cancels an external force produced to the movable bodies.

Linear motor apparatus and control method

A linear and rotary actuator system includes a shaft member moving linearly in an axial direction and rotating around an axis line, a hollow rotor surrounding the shaft member, a stator of a rotary motor having a space for holding the rotor and which rotates the rotor around the axis line, linear bearings, that rotates together with the rotor to transmit rotation of the rotor of the rotary motor to the shaft member and accepts linear movement of the shaft member, an angle measuring unit for measuring a rotation angle of the rotor, and a rotary motor driver for controlling the rotary motor in such a manner that the rotation angle of the rotor of the rotary motor measured by the angle measuring unit conforms to a command value. The rotation angle of the shaft member is controlled by controlling the rotation angle of the rotor of the rotary motor.

Linear and rotary actuator system

A linear motor device includes a linear motor and a control unit configured to apply a load to a pressurizing object by causing a movable part of the linear motor to move. After causing the movable part to move toward the pressurizing object at a predetermined first speed based on position control, the control unit controls the movable part to move by performing deceleration to a second speed which is slower than the first speed and at which the pressure applied to the pressurizing object is less than or equal to a predetermined pressure when the movable part starts to apply the pressure to the pressurizing object, and the control unit causes the movable part to move until the current flowing through the linear motor is greater than or equal to a predetermined current limit value.

Linear motor device and method for controlling linear motor device

Provided is a linear and rotary actuator capable of bearing moment and load from a movable body and downsizing its radial dimension. A spline shaft is held in housings to be movable linearly in the axial direction and rotatable about the axis. The spline shaft is connected to a mover shaft of a linear motor. The spline shaft is surrounded with a hollow rotor of a rotary motor. The rotor is connected to a spline nut which transmits rotation of the rotor to the spline shaft by rotating together with the rotor and allows linear movement of the spline shaft. The rotor of the rotary motor is rotated by a stator of the rotary motor. The spline nut, the stator of the rotary motor and a stator of the linear motor are arranged in this order from an end of the spline shaft and mover shaft along the axial direction.

Linear and rotary actuator

Provided is a linear motor capable of simplifying assembling of a coil unit and stabilizing a coil pitch and the overall length of the coil unit. The linear motor has a rodhaving magnets, a plurality of coilsarranged in the axial direction of the rod, a housingcovering the coils, and a coil holderholding the coilsin the housing. The coil holderincludes a holder main bodyelongating in the coil arrangement direction and a plurality of spacer portionsmade of resin and each interposed between each adjacent two of the coilsto insulate the coilsfrom each other, the spacer portionsbeing formed integrally with the holder main body

Linear motor and method of manufacturing the same

A position detection system includes a linear motor having a rod in which magnetic poles of N pole and S pole are arranged alternately in an axial direction and a plurality of coils surrounding the rod a magnetic sensor for detecting change in the direction of the magnetic field of the rod caused by linear movement of the rod relative to the coils to output a sine wave signal and a cosine wave signal which are 90&#xb0; phase shifted with respect to one another, and a position detecting circuit for detecting a position of the rod relative to the coils. As the magnetic sensor detects the change in the direction of the magnetic field of the rod, the sine wave signal and the cosine wave signal output from the magnetic sensor hardly vary even when the distance between the rod and the magnetic sensor is changed.

Linear motor position detection system

A compact linear motor is provided which is able to limit a rod, which linearly moves relatively to coils, from revolving. The linear motor comprises a rod () equipped with magnets (), coils () surrounding the rod (), and a housing () covering the coils (), and the rod () is made to linearly move relatively to the coils () by magnetic fields from the magnets () and current made to flow through the coils (). And the rod () comprises an outer circumferential surface on which spline grooves () are formed so as to run along an axial direction of the rod (). The housing () comprises a spline nut () that fits the spline grooves () and limits the rod () from revolving around an axis line thereof.

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Tokyo, Japan

Shuhei Yamanaka