Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7795834 | Servo motor controller A controller includes a rotating direction detecting unit 34 to detect the rotating direction of a servo motor 6, a reversing distance computing unit 31 to compute a rotating angle of the servo motor 6, a rotation resistance computing uni... | 09/14/2010 |
| 7560890 | Position controller and controlling method therefor An objective is to obtain a high robust position controller and a controlling method therefor, with respect to their technique in which control gain, in order to prevent an overshoot due to frictions, is most suitably adjusted. The position controller having a feedf... | 07/14/2009 |
| 7541766 | System and method for the intelligent use of software deadband control in a control system In accordance with one embodiment of the invention a control system for controlling performance of a device is provided. The control system includes a controller system and a deadband compensator connected to the controller. The deadband compensator compensates for ... | 06/02/2009 |
| 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 |
| 7408316 | Multiple motor position control A controller for motor activation providing accurate and repeatable position changes by pressing and releasing a push button switch. Repeatable position changes are made in an advance direction by triggering a digital counter for a predetermined number of cycles of ... | 08/05/2008 |
| 7382107 | Shift range switching apparatus By utilizing a mechanical backlash generated between an electric actuator and a shift range switching mechanism, a specific region is obtained, in which a variation in the output shaft angle is relatively small with respect to a variation in rotor angle. In this spe... | 06/03/2008 |
| 7368888 | Methods and systems for reducing unintentional collisions A method for differentiating if a feedback signal is a result of an unintentional collision in a servo system includes injecting a feed forward term in the servo system. ... | 05/06/2008 |
| 7363109 | Backlash compensation control method, backlash compensation controller and backlash compensation control program To allow a robot performing a cyclic movement upon receipt of a driving force transmitted through a driving force transmission system from a driving source along with a backlash to perform the movement compensated for the backlash, during a first period within a cyc... | 04/22/2008 |
| 7292001 | Gain adjusting method for servo control device An object of this invention is to provide a gain adjusting method in a servo control device to suppress changes according to a place where a machine is located. This invention provides a gain adjusting method for a servo control device providing speed control... | 11/06/2007 |
| 7210392 | Autonomous weapon system An autonomous weapon system including weapon (9) and weapon mounting system (7, 8) operable to point the weapon (9) in accordance with input control signals. The weapon system includes a sensor (2) to acquire images and other data from a ... | 05/01/2007 |
| 7208904 | Multiple motor position control A controller for motor activation providing accurate and repeatable position changes by pressing and releasing a push button switch. Repeatable position changes are made in an advance direction by triggering a digital counter for a predetermined number of cycles of ... | 04/24/2007 |
| 7206659 | Numerical controller A numerical controller capable of obviating the waste of a workpiece by machining such that a position deviation by learning control is converged and automatically performing storage of correction data and actual machining. A tool and the workpiece are moved to noni... | 04/17/2007 |
| 7183739 | Synchronous control device There is provided a synchronous control device for driving the same control object with two servomotors. The synchronous control device detects the physical quantity that represents the difference between the forces on the two servomotors, and, on the basis of the d... | 02/27/2007 |
| 7173392 | Switching controller and method for controlling switching position A second member and a first member are applied with bias force to mechanically engage with each other at one of detent positions defining relative positions therebetween. An electric motor rotating a rotor therein when being supplied with electricity. Rotation of th... | 02/06/2007 |
| 7174226 | Numerical controller for carrying out learning control A numerical controller having a learning control function executes commands in an NC program, starts performing learning control from a location where the same operation pattern starts occurring, and stops performing learning control at a location where the same ope... | 02/06/2007 |
| 7173399 | Integrated torsional mode damping system and method An integrated torsional mode damping method for a current source converter, including a rectifier, an inverter, and a DC link inductor coupled between the rectifier and the inverter, includes sensing a signal representative of torque on a shaft coupled to the invert... | 02/06/2007 |
| 7129668 | Actuator control unit An actuator control device includes an electrical control unit for detecting the present positions of output shafts of servo motors, and communicating with control circuits for driving the output shafts of the servo motors to target stop positions on the basis of th... | 10/31/2006 |
| 7102316 | Mechanical press In a press having a plunger supported so as to be movable linearly back and forth by drive means which include at least one servomotor in combination with a rotatably supported inertia structure connected for rotation with the servomotor, the inertia structure has a... | 09/05/2006 |
| 7084596 | Servomotor driving controller A servomotor driving controller capable of highly accurate machining, which prevents a quadrant projection upon change in the quadrant where machining is made. After the position deviation converges to zero by means of learning control, the velocity command or a dif... | 08/01/2006 |
| 7061202 | Automobile servomotor controller An automobile servomotor controller includes a master control unit having a master control circuit for transmitting a designation signal and a slave unit having a motor and a control circuit which controls driving of a motor by outputting an operation signal to a dr... | 06/13/2006 |
| 7053582 | Control magnetic bearing device A control magnetic bearing device comprises a plurality of control magnetic bearings for contactlessly supporting a rotor, an electric motor for rotating the rotor, a magnetic bearing drive circuit for driving the magnetic bearings, an inverter for driving the elect... | 05/30/2006 |
| 7042187 | Control apparatus for electric actuator A driver for an electric actuator comprises a direction-switching means which switches a direction of rotation of a rotary driving source based on a direction instruction input signal, a current amplifier/limiter which converts a voltage outputted from the direction... | 05/09/2006 |
| 7034492 | Methods and systems for reducing unintentional collisions A method for differentiating if a feedback signal is a result of an unintentional collisions in a servo system includes injecting a feed forward term in the servo system. ... | 04/25/2006 |
| 7034494 | Servo-control unit for a variable prestressed load The invention relates a servo-control unit for a load (2) driven in rotation by motorization means (1) connected to the Load by two reduction gears (3, 4) and comprising several sensors for measuring their movements It includes a prestressing mo... | 04/25/2006 |
| 7034491 | Numerical controller For outputting an amount of backlash compensation according to the direction of reversal in the reversal motion of the moving axis, three output modes are prepared: (a) a mode in which a preset backlash compensation is outputted all at once, (b) a mode in which back... | 04/25/2006 |
| 7015670 | Method of controlling a high-friction electro-mechanical servo-mechanism to minimize the power needed to hold a loaded output member The invention provides a method for controlling an electromechanical servomechanism (20) for moving an output member relative to a variable load (38). The servomechanism includes: a motor (37) having at least one coil (32A, 32B or ... | 03/21/2006 |
| 6982536 | Device and method for apportioning a movement of a machine element along a drive axis of a machine tool or production machine A device and method for apportioning a movement of a machine element driven by at least two drives for movement along a drive axis of a machine tool or production machine are described. A low-pass filter filters predetermined desired drive axis values to generate fi... | 01/03/2006 |
| 6964387 | Apparatus for preventing backlash of spool used in baitcasting reel Disclosed is an apparatus for preventing backlash of a spool used in a baitcasting reel. A movable cam 20 assembled to a stationary cam 10 secured to a spool shaft movesin a direction parallel with the spool shaft, when a revolution of the spool is inc... | 11/15/2005 |
| 6949905 | Servo control system and method of setting A servo control system which comprises an original cam pattern generator 11 for generating a first pattern of a cam shape relative to a phase corresponding to one revolution of a cam mechanism; a corrector 14 for differentiating the original pattern of... | 09/27/2005 |
| 6905438 | Vehicle powertrain control system and method for enhanced vehicle start-up acceleration A vehicle powertrain includes an electric motor (4) and a clutch (12) between the electric motor and a motor driven road wheel (3L, 3R). Powertrain play between the electric motor (4) and the road wheel is eliminated upon determina... | 06/14/2005 |
| 6903529 | Method and apparatus for damping mechanical oscillations of a shaft in machine tools, manufacturing machines and robots Damping of mechanical oscillation in a shaft that is provided by feedback wherein the output signals of multiple feedback devices are negatively coupled and added to a desired speed signal of a motor speed controller of the driving motor is disclosed. At least one s... | 06/07/2005 |
| 6903527 | Servo controller A switch is turned on by a learning control start command from a master control unit, and the positional deviation at respective cycles is read in. Correction data read out from a learning memory is added to the positional deviation, and the result is filtered by ba... | 06/07/2005 |
| 6759825 | Control method and control apparatus for feed system The invention concerns a feed system control method and apparatus that can calculate an accurate backlash amount and can accomplish highly precise position control. Position errors are calculated before and after a reversal in direction of movement of a slide 30 | 07/06/2004 |
| 6686716 | Tuned open-loop switched to closed-loop method for rapid point-to-point movement of a periodic motion control system A motor control method and apparatus produce rapid, point-to-point movement while minimizing settling time and peak power consumption in a servo-control system with a periodic input. Rapid open-loop movement is combined with tuning of the open-loop input ... | 02/03/2004 |
| 6650078 | Method and system for controlling mechanical systems exhibiting discontinuity in inertial loading A technique is provided for adapting feedback control system performance to applications involving changing inertial loads. A modified gain profile is applied for a control system block that includes isolated torque scaling. The torque scaling block facil... | 11/18/2003 |
| 6633143 | Reactionless rotary drive mechanism An articulating probe head includes motors 12 and 18 for driving respective output shafts 14 and 20 about respective orthogonal axes z and x to move a stylus 22 over the surface of a workpiece under the control of a controller 26. At least one of the moto... | 10/14/2003 |
| 6580244 | Active damping and backlash control for servo systems Two motors are used to provide motion control in a transport drive system. A primary motor, or a primary and secondary motor, provides primary power for accelerated motion. PWM signals are used to drive the motors according to predetermined fixed function... | 06/17/2003 |
| 6392377 | Motor control apparatus and motor control method A motor control apparatus is arranged to drive and control a motor for transmitting the rotating force of the motor through a gear train. In reversing the rotation of the motor, the motor is caused to rotate at a speed higher than a normal rotation speed ... | 05/21/2002 |
| 6377007 | Motor torque control device of electric vehicle A motor torque control device of an electric vehicle sets creep torque in accordance with a vehicle speed sensed by a vehicle speed sensor, and sets acceleration torque in accordance with an accelerator control input sensed by an acceleration sensor. Then... | 04/23/2002 |
| 6349606 | Reduced backlash translating system Apparatus embodying the invention includes first and second motors coupled to a carriage assembly for moving the carriage assembly back and forth between first and second end points. The first motor is for developing a force to drive the carriage in one d... | 02/26/2002 |
