Abstract: A method of altering a rate of executing a motion plan by a computer-numerically-controlled machine can include: receiving, at a control unit of a computer-numerically-controlled machine and from a general purpose computer that is housed separately from the computer-numerically-controlled machine, a motion plan defining operations for causing movement of a moveable component of the computer-numerically-controlled machine; and altering, in response to a command received at the computer-numerically-controlled machine, a first execution rate of the operations to a second execution rate of the operations to change a rate of movement of the movable component. Systems and articles of manufacture, including computer program products, are also provided.

Abstract: An example two-faced linearly actuated suction gripper includes a first gripping surface having one or more first suction cups arranged to provide suction in a first direction. The suction gripper also includes a second gripping surface comprising one or more second suction cups arranged to provide suction in a second direction which is perpendicular to the first direction. The suction gripper further includes a linear actuator configured to provide movement of the second gripping surface parallel to the second direction towards a face of an object. The suction gripper includes a sensor configured to generate data indicating that the face of the object is adjacent to the second gripping surface; and an engageable brake that, when engaged, stops the movement of the linear actuator in response to the data from the sensor indicating that the second gripping surface is adjacent to the face of the object.

Abstract: A motor speed controller controls a motor speed to generate a phase reference pulse; generates a FG pulse per rotary angle of the motor; detects a difference between the number of phase reference pulses and the number of FG pulses for output as an integer number phase difference; detects and measures a time difference between an edge of the phase-reference pulse and an edge of the FG pulse in units of the reference clock for output as a decimal fraction phase difference; adds the integer number phase difference to the decimal fraction phase difference at a predetermined ratio for output as a phase difference; and controls driving of the motor in accordance with the phase difference.

Abstract: An electric motor in an appliance and a method of controlling the motor to achieve speeds greater than a base speed of the motor is provided. To achieve speeds above the base speed of the motor, field weakening can be implemented by applying a field weakening angle to a phase advance angle between a desired stator flux and a rotor flux. The field weakening angle can be based on the current speed of the motor. The field weakening angle can be a fixed angle and can be determined by comparing the current speed of the motor with a predetermined threshold. In addition, the magnitude of the electrical signal applied to the motor can be adjusted during field weakening based on a desired speed of the motor where the electrical signal can be a voltage.

Abstract: A motor control device includes a first control unit and a second control unit. The first control unit includes an issuing unit that issues a command that schedules a next operation of a motor according to an instruction from a controller. The second control unit includes a receiving unit that receives the command, a detecting unit that detects a state of the motor, a determining unit that makes a determination as to whether to drive the motor to perform the operation according to the state detected by the detecting unit, and an executing unit that drives the motor to perform the operation scheduled by the command as determined by the determination.

Abstract: A parallel mechanism includes a base portion, a bracket to which an end effecter is attached, a plurality of actuators attached to the base portion, a plurality of arms through which the plurality of actuators and the bracket are coupled together in parallel, and a control device arranged to control the actuators. When the end effecter in a stopped state is moved to a target position, the control device is arranged to control the actuators so that a level of acceleration at which the end effecter is accelerated is higher than a level of deceleration at which the end effecter is decelerated.

Abstract: A meter system includes: an indicator including a pointer, a step motor, a stopper mechanism and a driving controller; and a flasher function unit including a flasher switch, a flasher and a flasher controller. The driving controller has: a stopper position detection operation executing element for executing a pointer moving away operation when a stopper position detection operation executing condition is satisfied and for executing a voltage detection type zero point stopper position detection operation when the executing condition is satisfied, and the flasher switch does not turn on and off, and a zero point return enforcement type zero point stopper position detection operation when the executing condition is satisfied, and the flasher switch turns on and off; a zero point setting element; and an applying element for applying the driving signal having the zero point.

Abstract: Methods, devices and computer program products automatically package an object, such as, for example, whole muscle meat pieces, in a covering material, such as, for example, netting. The devices include a pusher assembly, an electric motor, preferably a servo motor with a gear box, that drives a linear drive assembly. The devices can include a programmably adjustable index and/or speed profile for the pusher assembly.

Abstract: Time information indicates time required for reflecting a speed control indicating value actually on the rotation speed of the motor, the speed control indicating value being read by a motor driving part and then, being reflected on the rotation speed of the motor by the motor driving part. the speed control indicating value is generated based on the time information and the rotation speed information. The speed control indicating value is read at a period which is based on the time information for actually driving the motor.

Abstract: A concrete vibrator system with a constant speed motor, one of a set of vibrator heads with different load characteristics, and one of a set of drive shafts connecting the motor output shaft with one of the vibrator heads. A speed control circuit senses motor shaft speed and maintains constant speed. The motor is cooled by a fan mounted on the motor rotor which draws air through an inlet and exhausts air through an outlet both of which face downwardly when the motor is in use. Rain or other liquids are prevented from reaching the motor.

Abstract: The present invention relates to a method for ensuring a constant target speed of a battery driven electrical motor, the battery driven electrical motor being adapted to move a piston rod in an injection device so as to inject a set dose of medicine from the injection device, the method comprising the steps of setting a first target speed to be reached by the motor, determining whether the first target speed can be reached, and, if the first target speed can be reached, maintaining the first target speed until a set dose of medicine has been injected from the injection device, or if the first target speed cannot been reached, setting a second target speed.

Abstract: A system for generating a motion profile in real time includes a processor. The processor breaks a move into a first phase and a second phase. The first phase includes commanding the move toward a constant velocity segment, and the second phase includes monitoring the first phase to determine when during a move in progress it is necessary to implement a jerk value required to successfully reach end conditions. The processor also transmits command signals based upon the motion profile and calculates the point at which the second phase must take control of the move in progress to reach a target position. The system further includes at least one input/output module that receives command signals. A method for generating a motion profile in real time is also presented.

Abstract: A motorized steering column module with position control including a moving device that moves a steering wheel in an axial direction, bringing it closer or further away from a selected position, and in a radial plane for regulating upward and downward movement with the aid of at least one electronic motor controller; and a controller that varies the speed of the motor at least proximate a departure position and an arrival position.

Abstract: In an electrically driven vehicle having a controller, the vehicle has a steering angle sensor for outputting a detected value of a steering angle of the vehicle, the controller includes a first torque order pattern along which a torque order for a first electric motor is determined and a second torque order pattern along which a torque order for a second electric motor is determined, and the first and second torque order pattern are modified on the basis of the detected value of the steering angle so that the torque order determined along the second torque order pattern is greater than the torque order determined along the first torque order pattern under the identical velocity when the vehicle turns to the left, and the torque order determined along the first torque order pattern is greater than the torque order determined along the second torque order pattern under the identical velocity when the vehicle turns to the right.

Abstract: A bathroom ventilator fan with the soft-start function includes an impeller and a motor. The motor is coupled to the impeller for driving the impeller to rotate. The motor has a control module for driving and controlling the rotation speed of the motor according to a soft-start signal. The soft-start signal includes a soft-start section and a target-driving section. The control module slowly increases the rotation speed of the motor from the soft-start section to reach the target-driving section.

Abstract: A motor control method/device is provided in which a speed change during a deceleration period is stabilized in performing a speed feedback control of a motor. In the motor control method/device, the speed feedback control is performed such that a speed of a body driven by the motor is consistent with a predetermined target speed. A deceleration directive corresponding to time elapsed since a predetermined deceleration control start timing is generated as the target speed using a deceleration function of the elapsed time, to perform the speed feedback control based on the deceleration directive, during a deceleration control period. The deceleration control period starts from the deceleration control start timing and ends when the driven body is stopped. The deceleration function monotonically decreases from the deceleration control start timing until the deceleration directive becomes zero (0) and its derivative is a monotonically decreasing or increasing function or a constant.

Abstract: A method in connection with a network converter, and a network converter, the network converter comprising two or more network converter modules coupled in parallel, and first control means for controlling the network converter modules. The method comprises the steps of controlling the network converter modules by the first control means, preventing or allowing use of one or more network converter modules in order to reconfigure the network converter during operation of the network converter.

Abstract: An apparatus for use with a signal generator and a motor controller includes a velocity compensator, an adjustor, and a velocity regulator. The signal generator provides a reference velocity signal, and the motor controller receives an output signal and uses the output signal to control a torque input signal applied to the motor. The velocity compensator is operable to receive the reference velocity signal, determine a derivative of the reference velocity signal, and generate a velocity compensation signal based on the derivative. The adjustor is operable to adjust the reference velocity signal as a function of the velocity compensation signal. The velocity regulator is operable to compare the adjusted reference velocity signal to a feedback velocity signal and generate the output signal received by the motor controller for adjusting the torque input signal based on the comparison.

Abstract: Reconfiguration of stator winding sections of each phase of a multiphase motor is controlled for successive ranges of speed during which the motor can be expected to operate to obtain optimum operating efficiency throughout the entire operating range. All winding sections for a stator element are energized throughout the motor operating speed range but connected, through appropriate switches, in different circuit configurations for respective portions of the speed range. The switches are activated by a controller in response to a sensed motor speed signal. The reconfiguration of stator winding sections may be incorporated within a motor control system that is adaptive to control various motor parameters in response to sensed conditions as well as user input commands.

Abstract: An electric working machine has an electric motor and a speed adjustment member for undergoing movement within a range of positions including a low speed range position in which the electric working machine travels at a low speed, a high speed range position in which the electric working range position in which the electric working machine travels at a speed intermediate of the low speed and the high speed. A potentiometer receives a voltage which varies in dependence on the position of the speed adjustment member within the range of positions. A control unit controls the electric motor in accordance with the variation of the voltage received by the potentiometer to vary a travel speed of the electric working machine so that a rate of change of the travel speed of the electric working machine is smaller when the speed adjustment member is in the intermediate speed range position than when the speed adjustment member is in each of the low speed range position and the high speed range position.

Abstract: A motor control system is provided for controlling at least one motor driven mechanical actuator. The control system drives the motor according to a function of the actuator position. The system is further arranged to modify the motor speed to ensure that a predetermined power limit is not exceeded.

Abstract: A ventilation system (20) made up of a wiring harness (22), a power source (21), a fan motor (23), a resistance circuit (70), and a selector switch (30-or 40) is taught. The selector switch (30 or 40) has five or six positions, and determines a different current through the fan motor (23) for each position. The resistance circuit (70) limits the current in three or four of the positions. A control apparatus (25) is mechanically coupled to the selector switch (23) and configured to allow a user to select one of the positions. One of the positions is an “off” position passing zero current through the fan motor (23), and one of the positions is a “maximum” position passing a maximum current through the fan motor (23). Each of the other positions is intermediate and passes a current through the fan motor (23) and a resistance in the resistance circuit (70) to limit the current.

Abstract: An adaptive closed-loop controller is described that reduces repetitive speed variations of precision rotatable mechanical components, such as rollers, casting wheels, pulleys, gears, pull rollers, extruders, gear pumps, and the like. A system is illustrated in which the controller is coupled to a motor for driving a rotatable mechanical component in response to a motor control signal. A sensor is mounted to the shaft of the mechanical component, and generates a speed signal representing angular velocity of a mechanical component. The controller receives the speed signal, and generates a set of data elements to relate speed variations of the mechanical component to a plurality of angular positions of the mechanical component over one or more revolutions. The controller generates an error signal based on the data elements and introduces the error signal into closed-loop control circuitry to provide adaptive control over the mechanical component.

Abstract: Methods and apparatus for minimizing electrical machine vibration are described. In an exemplary embodiment of the method, power is applied to the motor under microprocessor control such that a pulse modulated current profile is applied to the motor which in turn controls the amount of torque generated by the motor. By adjusting current profiles, torque generation is controlled, and vibration and noise are eliminated.

Abstract: A movable barrier operator having improved safety and energy efficiency features automatically detects line voltage frequency and uses that information to set a worklight shut-off time. The operator automatically detects the type of door (single panel or segmented) and uses that information to set a maximum speed of door travel. The operator moves the door with a linearly variable speed from start of travel to stop for smooth and quiet performance. The operator provides for full door closure by driving the door into the floor when the DOWN limit is reached and no auto-reverse condition has been detected. The operator provides for user selection of a minimum stop speed for easy starting and stopping of sticky or binding doors.

Abstract: A motor-vehicle door latch to avoid unnecessary sound emission, has its motor operated with pulse-width modulation so that, once a blockade time point is reached or prior thereto, the motor is energized with reduced power so that it generates a ramp characteristic running to a minimum. The torque and/or speed are thereby reduced along the ramp characteristic correspondingly.

Abstract: A motor control unit (1) includes a white noise generator (8), an instruction switch (9) for switching between an input control instruction (Vins) and a white noise output of the white noise generator (8), a controller (10) for feedback controlling the motor drive velocity, a detection unit (13) for detecting and sampling the real velocity of a motor or a load at a predetermined period, a first Fourier transformer (15) for Fourier-transforming the control instruction data (Cins) together with the sampled velocity data (Vm), and a first frequency characteristic operation unit (16) for calculating the frequency characteristics in a range from the velocity instruction (Cins) to the sampled velocity (Vm) based on output data of the first Fourier transformer (15), thus obtaining the frequency characteristics in a short period without necessity of a servo-analyzer.

Abstract: A centrifuge rotor overspeed protection system which can operate with rotors of at least two speed ranges. A set of coding elements are provided on the rotors coded to represent the actual maximum safe speed rating of the rotor. An additional set of coding elements coded to correspond to the maximum speed in the lower speed range are also provided such that the rotor can be operated at the maximum speed possible in a prior art centrifuge designed for operation in the lower speed range. The detection circuit for the coding elements automatically adjusts the detection threshold depending on the average values of the sensor output peaks corresponding to the codes.

Abstract: An apparatus for controlling a DC motor driven screw feed which moves the table of a machine tool into prescribed positions including a plurality of limit switches which detect the position of the table, a rate change control circuit which receives signals from the limit switches and changes the rate of revolution of the DC motor when the table has reached prescribed rate change positions and a current limiting circuit which supplies the DC motor with a prescribed constant current and keeps the output torque of the DC motor at a prescribed level when the table has reached a prescribed dwell position.

Abstract: A method and an apparatus for producing rapid movement and smooth braking and a precisely defined final position of a movable robot arm. For moving the robot arm from a first operative position to a second operative position the robot arm is first driven by a rapidly rotating motor until it comes close to its second operative position, at which time a slowly rotating motor with an associated coupling takes over the drive and reduces the driving speed of the robot arm progressively. When the robot arm reaches its final position a brake is actuated so as to clamp said robot arm.

Abstract: Web tension in a creped paper rewinder is controlled at two stations along the web route by respective counter-weighted dancer rolls which also serve as sensors for a drive speed control mechanism. Primary drive speed is under programmed control whereby a first, length percentage of a rewind reel length determines the high speed drive duration whereupon the drive speed is reduced to a lower rate for rewind reel length completion. Rewind reels are self-started on vacuum mandrels which are magazine supplied to the reel starting position. The supply web is longitudinally slit into a multiplicity of strips, each strip being wound about the vacuum mandrel in a reel laterally distinct from adjacent reels but with all reels built upon a common axis mandrel. Tails of the several strips are severed from the web supply by traversing cutter-gluer apparatus which simultaneously spots the end of each cut tail with a portion of adhesive to prevent unreeling following strip reel removal from the mandrel.

Abstract: A dc voltage is applied to an R-C element through a Bootstrap type linearly charging circuit to form a command speed voltage smoothly and linearly increased from its null magnitude to a constant magnitude for the acceleration of an elevator car. Upon decelerating the car, the dc voltage is decreased stepwise by successively opening serially interconnected contact sets coupled to a shortcircuit resistor and applied to a unidirectional R-C element including a diode through the linearly charging circuit. An output from the element is coupled to the stepped voltage through an R-C discharge circuit to produce from the element a command speed signal smoothly and linearly decreased to its null magnitude.

Abstract: A speed control system for a chairlift which reproduces automatically at the arrival of a seat in the disembarking station the speed which this seat had in the embarking station. The speed information is applied to a shift-register or a magnetic recorder which restores this information to control the speed at the arrival.