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| Number | Title | Issue Date |
| 8174218 | Servomotor current control method and servomotor A method of controlling a current by supplying a d-axis current in order to prevent a voltage saturation includes: defining an amount of the d-axis current as Id=|Idmax|·sin θ; continuously comparing a voltage command value with the voltage command value threshold... | 05/08/2012 |
| 8148931 | Multi-degree-of-freedom stage control system There are included a plurality of actuators, an instruction generator for generating instructions of plural degrees of freedom, a position arithmetic unit for calculating positions of plural degrees of freedom from signals of a plurality of sensors, a control arithm... | 04/03/2012 |
| 8102136 | Simultaneous zero verification for motors in a printing press A method for determining accuracy of an actual position of a plurality of independent motors in a printing press is provided. The method includes commanding each of the plurality of motors in the printing press via a controller to move a desired initial position, co... | 01/24/2012 |
| 8080966 | Motor control architecture for simultaneously controlling multiple motors A motor control architecture is provided that simultaneously controls multiple motors. The motor control system includes memory, a plurality of motor control processors, and a communication controller. The motor control processors are each responsive to control sign... | 12/20/2011 |
| 8067918 | Servomotor controller for controlling periodic reciprocation A servomotor controller capable of properly generating reference positions, by which learning control of angle based method may be applied to the periodically reciprocating motion of an object. The learning controller obtains a first positional deviation of a driven... | 11/29/2011 |
| 8035329 | Apparatus for actuating an electrical switching device The invention relates to a device for actuating an electrical switchgear comprising at least one mobile contact point driven by a rotary shaft. According to the invention, an electric motor comprising a rotating drive shaft can be coupled to the rotary shaft by mean... | 10/11/2011 |
| 7915851 | Numerical controller controlling acceleration and deceleration of respective control axes up to command speeds Initial speeds in the move commands for respective control axes at servo-on are determined according to parameter setting, or the comparative relationship or difference in speed among the actual speeds of the control axes so that difference in position between the c... | 03/29/2011 |
| 7915850 | Apparatus and method for controlling servomotor of electric injection molding machine An apparatus and method for servomotors of an electric injection molding machine includes a motion controlling unit, two driving amplifying units, and two servomotors respectively connected to the driving amplifying units. The motion controlling unit includes two se... | 03/29/2011 |
| 7852033 | Driving control apparatus and method, and exposure apparatus A driving control apparatus for driving a controlled object. The apparatus includes first and second interferometers, each of which (i) detects a position of the controlled object in a predetermined direction and (ii) produces a respective detection value. A control... | 12/14/2010 |
| 7791305 | Control apparatus of servo motor The control apparatus 10 of a servo motor of the present invention has a position control unit 11 controlling the position of a servo motor 33, a speed control unit 12 controlling a speed of the servo motor 33, a distributing unit ... | 09/07/2010 |
| 7782004 | Method of adjusting a plurality of successive position-controlled axes in an adjusting stroke A control axis is subordinated to a plurality of position-controlled successive axes. It is determined, while an adjusting stroke, an initial theoretical position value for each successive axis by means of the position value or the temporal derivation of the positio... | 08/24/2010 |
| 7764040 | Robot control apparatus comprising a servo amplifier having an AC/DC converter A robot control apparatus comprises a servo amplifier having an AC/DC converter and used for driving a servo motor of a robot, and performs control so that power for driving the robot is supplied to the servo amplifier through a capacitor inrush current preventing r... | 07/27/2010 |
| 7746019 | Servo control circuit The present invention discloses a servo control circuit comprising: a first node for receiving a control voltage; a second node for receiving a feedback voltage; an operational amplifier controlling a current on a path according to the voltages at the first and seco... | 06/29/2010 |
| 7705553 | Serial backplane for medium voltage motor drive system A hybrid backplane uses multiple, parallel serial communication channels to provide flexibility and robustness in a motor drive control requiring high-speed data communication for the real-time control of motor waveforms. ... | 04/27/2010 |
| 7659682 | Servo motor controlling method A servo motor controlling method includes: directly or indirectly detecting a position of a moving body which performs a circular-arc interpolation feeding motion by a servo motor; performing a feedback control for enabling the position of the moving body to comply ... | 02/09/2010 |
| 7642740 | Servomotor controller A servomotor controller by which a load on a machine device can be reduced, and control capability can be stabilized as well as the resistance property for a temporary blackout or a temporary voltage drop can be more secured in accordance with driving conditions of ... | 01/05/2010 |
| 7592769 | Electric cylinder There are provided two kinds of nuts of a ball thread nut 20 and a non-ball thread nut 30 which is rotatable in synchronization with the ball thread nut 20 and in which a thread groove in rectangular or trapezoidal shape in section is formed. In... | 09/22/2009 |
| 7531981 | Controller for servomotor A controller for a servomotor capable of improving accuracy of positioning and quality of a machined surface by switching modes of correction of a position command or the like, and reducing a shock at the time of switching. A correction amount generating section obt... | 05/12/2009 |
| 7514895 | Method and device for synchronously controlling multiple printing presses or multiple units in printing press A method and a device for synchronously controlling multiple printing presses or multiple units in a printing press can reduce power consumption and improve durability of motors and motor bearings. A synchronous control device for multiple printing presses includes ... | 04/07/2009 |
| 7474073 | Method and system for multiple servo motor control using a single control loop The solution involves the use of two or more motors to drive a common mechanism. The single control loop includes a position sensing device coupled to only a first of the plurality of servo motors and generating a position signal. A signal comparator receives the po... | 01/06/2009 |
| 7463003 | Motor control system for controlling a plurality of motors A motor control system for controlling a plurality of motors for moving an object in respectively different axial directions that includes a plurality of target devices, each target device including a (pulse width modulation) PWM signal generator that generates a PW... | 12/09/2008 |
| 7456599 | Position feedback device with prediction An apparatus for use with an encoder feedback device includes a comparator, a counter, and a prediction unit. The encoder feedback device is coupled to rotate with a rotating load and operable to generate at least one feedback position signal indicative of movement ... | 11/25/2008 |
| 7428846 | Shaft encoder with anti-backlash gears An encoder shaft assembly includes a drive shaft having a drive gear, and an array of encoder units each having an encoder shaft and anti-backlash gears which engage the drive gear. ... | 09/30/2008 |
| 7429844 | Servo unit and joint servo for use in a robot system In a robot servo mechanism, the servo mechanism is installed within a L-shaped housing box to make dimension thereof smaller with smaller dead space thereof. In the servo mechanism, each of first and second housing box 41 and 42 of a robot servo unit h... | 09/30/2008 |
| 7388344 | Multichannel pulse train transmitting apparatus In the multi-shaft driving apparatus, position command pulse trains for servomotors are generated from a motor controller and supplied to motor drivers for the respective servomotors via a multichannel pulse train transmitting apparatus. The multichannel pulse train... | 06/17/2008 |
| 7385370 | Driving apparatus, exposure apparatus, and device manufacturing method A driving apparatus for moving an object. The apparatus includes a first actuator which drives the object in X and Y directions, a second actuator which drives a reaction force counter which receives a reaction force generated when the first actuator drives the obje... | 06/10/2008 |
| 7375490 | Methods for managing electrical power Certain exemplary embodiments comprise a system comprising a plurality of Active Front End units adapted to be electrically coupled to a direct current (DC) bus. Each of the plurality of Active Front End units can be adapted to be electrically coupled to a separate ... | 05/20/2008 |
| 7372548 | Levitated reticle-masking blade stage A method, apparatus, and system for controlling a reticle-masking blade in a photolithography system. A reticle-masking blade is supported with a reticle-masking blade carriage assembly. The reticle-masking blade carriage assembly is levitated at a position with res... | 05/13/2008 |
| 7364483 | Marine reversing gear assembly The present invention provides a marine reversing gear assembly, wherein a manual directional control valve 7a and an electromagnetic directional control valve 7b for a forward/reverse directional control valve 7 for hydraulic oil ... | 04/29/2008 |
| 7366576 | Position control device and position control method for machine tools A machine tool moves a driven member by use of a servomotor. A position control device controls the position of the driven member in accordance with full closed loop control. The position control device computes an integrated feedback value g in correspondence with ... | 04/29/2008 |
| 7359037 | Drive for reticle-masking blade stage A method, apparatus, and system for controlling a reticle-masking blade in a photolithography system. A reticle-masking blade is supported with a reticle-masking blade carriage assembly. The reticle-masking blade carriage assembly is levitated at a position with res... | 04/15/2008 |
| 7357202 | User input for vehicle control A user input for controlling acceleration of a vehicle. The user input has a movable member capable of deflection by a user such that a degree of deflection corresponds to a specified velocity commanded by the user. The correspondence between the degree of deflectio... | 04/15/2008 |
| 7348897 | Apparatus for transmitting position detection signal of multi-shaft motor An apparatus for transmitting a position detection signal of a multi-shaft motor whereby a parallel-form detection signal that is output from position-detecting devices disposed on each of a plurality of motors and used for indicating a motor rotation position can b... | 03/25/2008 |
| 7348745 | Controller First and second acceleration detectors are attached to first and second sections on a driven body, and values of accelerations α1 and α2 in a travel direction of the driven body are detected. On the basis of the difference or sum of the acceleration... | 03/25/2008 |
| 7331482 | Dispense pump with heated pump housing and heated material reservoir A heated dispense pump overcomes the limitations of conventional systems providing for reliable and efficient heating of the dispensed material in a system that is compact, lightweight, and accurate. A pump housing and cartridge body are formed of a thermally conduc... | 02/19/2008 |
| 7327103 | Driver and method for control of voice coil motor in disk drive A driver for a voice coil motor in a disk drive includes a sensor that provides a sense current by sensing a coil current in the voice coil motor, a comparator that provides an error current by determining a difference between a command current and the sense current... | 02/05/2008 |
| 7324187 | Illumination system and exposure apparatus Disclosed is an illumination optical system and an exposure apparatus having the same, and specifically, as an aspect of the invention, an illumination optical system for illuminating a surface to be illuminated, that includes an aperture stop for defining an effect... | 01/29/2008 |
| 7319909 | Position control device, measuring device and machining device In a quadruple loop position control device (1) including: a drive controller (5) having a current control loop that controls motor current (I) and a motor speed control loop that controls a motor speed (Vm); a speed control loop (3) that contro... | 01/15/2008 |
| 7317290 | Tandem battery powered inverter and method of implementing the same AC inverters that are electrically connected to a direct current source to convert the direct current source such that the transistor power module of an inverter can power a plurality of AC motors wherein the motors can be located remote from the inverters or within... | 01/08/2008 |
| 7316075 | Coordinate measuring machine for metrological determination of a coordinate on a test object A coordinate measuring machine for the metrological determination of a measurement coordinate on a test object comprises a table for mounting the test object. A first and a second bearing support are arranged on the table. A first and a second carriage, each moveabl... | 01/08/2008 |
