Abstract: A first-fail-safe electromotive furniture drive includes at least one drive unit having at least one motor; at least one actuating device having at least two actuating units, each of which includes a motor contact element and a safety contact element; at least one supply unit; and at least one safety device. The furniture drive is equipped with a reporting device for displaying the functioning and a failure of the at least two actuating units and the safety device.

Abstract: A first-fail-safe electromotive furniture drive includes at least one drive unit having at least one motor; at least one actuating device having at least two actuating units, each of which includes a motor contact element and a safety contact element; at least one supply unit; and at least one safety device. The furniture drive is equipped with a reporting device for displaying the functioning and a failure of the at least two actuating units and the safety device. The furniture drive includes at least one safety actuating device.

Abstract: A voltage determination device includes a reference voltage generation circuit; a determination target voltage line; a first voltage line; a second voltage line; and a switching circuit disposed between the first voltage line and the second voltage line. The switching circuit is provided for performing a switching operation according to a level of the determination target voltage. The voltage determination device includes a determining circuit for determining the level of the determination target voltage, and a control unit is provided for controlling a level of an electric current flowing between the first voltage line and the second voltage line. The control unit controls a resistivity between the switching circuit and the second voltage line so that the level of the electric current is maintained at a specific level when the determining circuit determines the level of the determination target voltage.

Abstract: A method to monitor integrity of a signal output from an operator-manipulable transmission range selector for a powertrain system includes equipping the transmission range selector with a range encoder and a direction encoder, determining a range state and a direction state based upon signals from the range encoder and the direction encoder, determining a discrete position of the transmission range selector based upon the range state and the direction state, and performing back rationality to verify the discrete position of the transmission range selector.

Abstract: An induction activated cover assembly includes a main body, a cover, a covering plate and two pivots. The main body has an opening vertically penetrating the main body. A lateral connecting groove is formed on a top surface of the main body. Two through holes are formed on two ends of the connecting groove respectively. The cover is pivotably disposed on the main body. A lateral connecting body is formed on a rear end of the cover, and the connecting body has a connecting body opening facing downward. Two pivot bores are formed on two ends of the connecting body. The covering plate encloses the connecting body opening. A receiving room is defined between the connecting body and the covering plate for the pivots to be received therein. Each pivot inserts through one of the pivot bores and its corresponding through hole to pivot the cover on the main body.

Abstract: A motor controller for controlling at least one electric motor has an operating signal generator for generating an operating control signal for the at least one electric motor and also a sound signal generator for generating a sound control signal. A mixer superimposes the sound control signal on the operating control signal in order to obtain a control signal for the at least one electric motor. It is then possible to dispense with loudspeakers and the like in the appliance which contains an electric motor with such a motor controller in order to output, for example, signal tones which indicate an operating state of the appliance to the user.

Abstract: A power converting apparatus for electric motor vehicle propulsion is provided that is suitable for a use in which power regeneration from an inverter unit to a power storing unit or power supply from the power storing unit to the inverter unit is frequently used. The apparatus includes a converter unit that receives input of a power supply voltage from the outside, converts the power supply voltage into a direct current of a predetermined value, and outputs the direct current, the inverter unit that is connected to an output side of the converter unit and drives an electric motor, and the power storing unit that is connected to the output side of the converter unit. A converter control unit included in the converter unit generates a current command for the converter unit and controls charging and discharge currents to and from the power storing unit based on this current command.

Abstract: A variable speed switch includes a switch main body portion which is accommodated in a housing of an electric power tool and mounted to the housing so as to be capable of relative movement, and a load sensor which is provided in the switch main body portion and capable of outputting an electric signal in proportion to the amount of distortion caused by a pressing force. The switch operating portion is mounted on the surface of the housing so as to be capable of relative displacement with respect to the housing and transmits a pressing force applied to the switch operating portion to the load sensor, with the maximum displacement amount of the switch operating portion being set to equal to or less than 5 mm.

Abstract: A rotation speed control circuit for controlling a rotation speed of a fan includes: a rotation speed detector, for generating a rotation speed voltage according to a rotation speed signal corresponding to the rotation speed; a sample and hold element, coupled to the rotation speed detector, for sampling and storing the rotation speed voltage; an error amplifier, coupled to the sample and hold element, for controlling a voltage of a filter capacitor according to the rotation speed voltage and a reference voltage, to adjust an error voltage; and a pulse width modulation signal generator, coupled to the filter capacitor, for generating a pulse width modulation signal according to the error voltage and a triangle wave.

Abstract: In a method for determining a load and/or an unbalance of a laundry drum of a washing machine driven by an electric motor having a stator with at least one winding coupled to a power inverter controlled by a control unit, the laundry drum is accelerated to a predetermined rotational speed and then slowed down. During the slow-down, the motor operates in generator mode and an electric current flowing through the at least one winding and/or an electric intermediate circuit voltage is measured. The time dependence of the electric power supplied by the electric motor in generator mode is evaluated during a revolution of the laundry drum. The unbalance and/or the load are determined from the measured current values and/or the intermediate circuit voltage and from the determined electric power. A corresponding circuit arrangement and a washing machine with this circuit arrangement are also disclosed.

Abstract: A driving system for a fan that enables an increase in motor current that may be supplied to excitation windings at the time of a maximum static pressure without increasing the rotational speed excessively when an amount of maximum air flow is provided. The fan driving system includes a drive signal generating circuit that generates drive signals, a motor driving circuit that supplies a motor current to the motor in accordance with the drive signals, a current detecting circuit (resistance) that detects the motor current, and a drive signal changing circuit. The drive signal changing circuit changes the drive signals generated by the drive signal generating circuit to restrict an increase in the motor current when the motor current becomes larger than a threshold.

Abstract: Methods, systems and apparatus for an electric motor assist bicycle having a hub motor mounted to the front or rear hub to provide electric motor assist, and to function as a generator to charge batteries. The motor can be either a molded or wound magnetic flux channel transverse wound stator permanent magnet motor. The bicycle hub motor includes an electronic controller mounted to the frame of the bicycle and coupled with feedback electronics for monitoring a timing, speed and direction and coupling a signal to a processing unit for adjusting the drive electronics driving the phase windings. The pedal crank arm housing of the electric motor assist bicycle can include battery access ports with batteries stacked inside the bicycle seat tube and the down tube and a strain gauge to measure the rider pedaling effort and produce a signal in response.

Abstract: A power device includes a switching device and a control unit. The switching device has a control terminal and an output terminal. The control unit is configured to control a rising time required for a driving voltage for controlling the switching device to reach a target level such that a voltage between the control terminal and the output terminal is maintained less than or equal to a critical voltage. When the voltage between the control terminal and the output terminal is greater than the critical voltage, leakage current is generated between the control terminal and the output terminal.

Abstract: A power tool including a motor, an input unit such as a variable-speed trigger switch, and a controller is provided. The controller controls the speed of the motor as a function of the input level indicated by the electrical signal from the input unit.

Abstract: An ultrasonic electro-mechanical resonant system and instrument that provides improvements in the design and implementation of a feedback system. The disclosed configuration and orientation of coils enhance the motional or velocity feedback signals while minimizing the effects of transformer coupling. A two coil and a three coil approach is disclosed that takes advantage of non-homogeneous magnetic fields. An asymmetrical arrangement enables velocity signals to be coupled into the coils without requiring additional signal conditioning or capacitive elements.

Abstract: An electronic apparatus includes a main body, a cover, a driving device, a receiving unit, and a processing unit. The cover is pivotably connected to the main body. The driving device drives the cover to rotate relative to the main body between an open position and a closed position. The receiving unit receives a control signal from an input device. The processing unit directs the driving device to rotate the cover relative to the main body between the open position and the closed position according to the control signal.

Abstract: A method is provided for controlling a position of an electric dc brush motor (22, 24) including the steps of supplying drive current (104) to drive the electric motor and calculating (70, 108) a coast constant for the motor. Current through the motor is monitored (80) and motor speed (66) is determined in response to monitored motor current. Electrical current to the motor is interrupted (50) in response to the calculated coast constant (70, 106) and motor speed when it is desired to stop the electric motor so that a brush of the motor will come to rest at a location on a commutator segment of the motor (22, 24).

Abstract: A positioning apparatus according to the present invention includes: a tabletop having a plane; a plurality of actuators configured to be driven in a direction perpendicular to the plane to move the tabletop; and a control unit configured to measure a frequency response of the tabletop and, when a peak is detected at the resonance frequency of elastic vibration of the tabletop, adjust the thrust distribution ratio for the plurality of actuators to reduce the peak.

Abstract: A battery system includes a plurality of battery cells and a plurality of printed circuit boards. A cell characteristics detecting circuit having a cell characteristics detecting function for detecting cell characteristics of the plurality of battery cells is mounted on each of the printed circuit boards. As well as the cell characteristics detecting circuit, a control-related circuit having a function different from the cell characteristics detecting function of each battery cell is mounted on the printed circuit board.

Abstract: The system includes a plurality of vertically spaced medication trays with a base assembly and a motor, responsive to computer commands, mounted on the base assembly. A drive shaft case member extends vertically from the base assembly. A cam assembly includes a plurality of spaced cam members, each cam member having concave portions and lobe portions on a peripheral surface thereof. A first drive clutch selectively engages the motor with both the drive shaft case member and the cam assembly for rotation of both in one direction, while a second drive clutch selectively engages the motor with just the cam assembly for rotation thereof in an opposing direction. The drive shaft case member has a cam follower assembly associated with each cam member, wherein one portion of the cam follower assembly engages the cam element and another portion engages an associated tray when the cam follower engages a selected concave portion on the cam element associated with the tray.

Abstract: Embodiments of the invention provide a water resistant electric motor and method of assembly. The motor includes a housing with a main body having a rear endbell, a stator compartment with stator windings, and a first ball bearing. The motor includes a lid having a second ball bearing, and a rotor with a shaft having a first end positioned in the first ball bearing and a second end positioned in the second ball bearing. An epoxy coating is used to overmold the stator compartment, the stator windings, and the rotor. The motor includes a printed circuit board assembly treated with an adhesion promotor and positioned adjacent to the rotor and stator windings. A silicone sealant is used to encapsulate the printed circuit board assembly, the rotor, and the stator windings and reacts with the adhesion promotor. The motor includes a gasket between the lid and the main body.

Abstract: Device for controlling an electric disconnecting switch motor, including a power supply circuit for supplying power to motor from a network voltage source, said circuit including a static converter controlled to output a voltage having a predetermined value to motor; and one or more configuration components, the actuation of which enables the configuration of said circuit with a view to setting the direction of the current (i) that flows in motor, characterised in that control of static converter and control of configuration components are provided by two separate control units, each outputting control instructions, the control instructions of one of the two control units being activated on the basis of a validation instruction from the other control unit.

Abstract: An induction activated cover assembly includes a main body, a cover, a covering plate and two pivots. The main body has an opening vertically penetrating the main body. A lateral connecting groove is formed on a top surface of the main body. Two through holes are formed on two ends of the connecting groove respectively. The cover is pivotably disposed on the main body. A lateral connecting body is formed on a rear end of the cover, and the connecting body has a connecting body opening facing downward. Two pivot bores are formed on two ends of the connecting body. The covering plate encloses the connecting body opening. A receiving room is defined between the connecting body and the covering plate for the pivots to be received therein. Each pivot inserts through one of the pivot bores and its corresponding through hole to pivot the cover on the main body.

Abstract: A speed and power control mechanisms for battery powered DC motors including a plurality of batteries structured to be configured in series, parallel, or series/parallel wiring configurations/combinations, a selectable switch, relay, or contractor structured to wire the batteries in the series, parallel, or series/parallel wiring configurations/combinations based on the setting of the selectable switch, relay, or contractor to deliver various selected voltage levels, and thus various selected power and speed levels to a motor.

Abstract: System and method for operating a motor using a single general purpose input/output (GPIO) pin of a controller. In one embodiment, a control circuit may include a first terminal coupled to a GPIO pin of a controller. The first terminal can be configured to receive, and output, at least one or more signals. The control circuit may include a plurality of elements coupled to the first terminal, and motor driver circuit output terminal, such that the control circuit may be configured to output one more control signals to the motor driver circuit output terminal for control the motor driver circuit. Motor driver control signals may be based, at least in part, on one or more signals received from the first terminal.

Abstract: A motor control unit controls a motor including a rotor and a stator facing the rotor. A current drive unit drives the motor at an axis current value of a rotating coordinate system that rotates in accordance with a control angle that is a rotational angle used in a control. An addition angle calculation unit calculates an addition angle to be added to the control angle. A control angle calculation unit obtains, at every predetermined calculation cycle, a present value of the control angle by adding the addition angle that is calculated by the addition angle calculation unit to an immediately preceding value of the control angle. An angular speed calculation unit calculates an angular speed of the rotor. An addition angle correction unit corrects the addition angle based on the angular speed calculated by the angular speed calculation unit. A filtering unit filters the angular speed calculated by the angular speed calculation unit.

Abstract: A fan arrangement (20) has a fan (24) driven by an electric motor (22), also an apparatus for detecting the electrical power (PIST) consumed by the electric motor (22) during operation; an input apparatus (28) for inputting a desired rotation speed (nSOLL) of said electric motor (22); a converter (26) for converting said desired rotation speed (nSOLL) into a desired electrical power (PSOLL); and a controller (44), which regulates the control input controlling the electric motor (22) in such a way that the difference between the electrical power (PIST) consumed in operation and the desired electrical power (PSOLL) is reduced, in order thereby to improve the air output characteristic curve (49, 58) of the fan arrangement (20) at least in a portion of the overall operating range.

Abstract: A current controller for an electric machine that includes an input, an output, a threshold generator and a comparator. The threshold generator stores a scaling factor and includes a PWM module that operates on a reference voltage to generate a threshold voltage. The duty cycle of the PWM module is then defined by the scaling factor. The comparator compares a voltage at the input against the threshold voltage and causes an overcurrent signal to be generated at the output when the voltage at the input exceeds the threshold voltage.

Abstract: A method of controlling a solenoid for controlling the force thereof, and a controllable force transducer includes that only a small part of the maximal stroke length of the solenoid is utilized, whereby the exerted force thereof is substantially constant within said stroke-length distance, when the solenoid is fed with a constant driving power. At a constant driving voltage, the feed current can be controlled for a proportional alteration of the exerted force of the solenoid within said stroke-length distance. The controller finds favourable use in a sheet separator.

Abstract: An electric compressor integral with a drive circuit incorporates a compression mechanism section, a motor for driving the compression mechanism section, and a motor drive circuit. A refrigerant gas chamber having a refrigerant gas expansion space, into which refrigerant gas is introduced, is formed between a drive circuit installation section and a motor installation section, by a first partition wall provided on the drive circuit side and a second partition wall provided on the motor side, the side opposite the drive circuit side. The refrigerant gas chamber is interrupted by the first partition wall against the drive circuit installation section and is communicated with the motor installation section by a through hole that is provided in the second partition wall and through which the refrigerant gas can pass.

Abstract: Disclosed herein is a method of controlling a motor in an image reading apparatus. It may be possible to optimize the drive current of the motor for driving the movement of the scanning module by using information associated with, for example, the time it takes for the scanning module to return to a home or rest position after the scanning module is moved from the home position to a predetermined position. Such optimized drive current can result in improvements in the reading performance of an image by the image reading apparatus and reduction of power consumption.

Abstract: A controller 10 suitable for controlling a bath lift. The controller 10 includes a rechargeable unit 12 and a first protection unit 14 which measures the voltage and current provided by the rechargeable unit 12. The first protection unit 14 prevents connection to the bath lift when the voltage of the rechargeable unit falls below a lower predetermined limit. A second protection unit 20 is also provided which measures the voltage from the rechargeable unit 12 and detects whether the voltage has fallen below an upper predetermined voltage, and if the voltage has dropped below this level downward movement of the bath lift is not permitted.

Abstract: A fan includes a speed control circuit and a motor electrically connected with the speed control circuit. The speed control circuit includes an inputting circuit and a transforming circuit electrically connected with the inputting circuit. The inputting circuit supplies a constant current to the transforming circuit. The transforming circuit transforms the constant current to a fluctuating current and outputs the fluctuating current to the motor of the fan. The fluctuating current causes a rotation with a fluctuating speed to the motor of the fan.

Abstract: Method and system in connection with a motor operated tension measuring roll (1) for compensating an error in tension measuring of a continuous material web, the method comprising defining the tension Tmeas of a material web (4) by a force sensor (3) provided at the tension measuring roll.

Abstract: Current control circuit controls an output voltage of DC power supply so as to increase current passing through inverter circuit as the motor increases its the speed. The control offers an RPM—torque characteristic of the motor in which torque increases as the RPM increases. By virtue of the RPM—torque characteristic, a ventilating device employing brushless DC motor exhibits preferable air quantity—static pressure characteristic where less change in air quantity is expected even when a pressure loss—outside wind pressure, duct length or the like—varies.

Abstract: Energy recovery during recirculation phases of the phase windings of a multiphase spindle motor is increased when all the MOSFETs of the output bridge stage associated therewith are turned off (tristated) for charging a hold capacitor. This is accomplished by allowing the recirculation of the motor currents through the same MOSFETs of the output bridge stage that are turned on during the current recirculation phases. Recirculation of the currents and the charging of the hold capacitor takes place through fully saturated power MOSFETs.

Abstract: A monitor opening mechanism includes a first rotating shaft rotatably connected to a host and having a first toothed portion. A stepper motor is disposed in the host and includes a second rotating shaft having a second toothed portion engaging the first toothed portion. A fine-tuning control circuit board is electrically connected to the stepper motor. A first fine-tuning key is electrically connected to the fine-tuning control circuit board. When the first fine-tuning key is operated, the fine-tuning control circuit board drives the second rotating shaft to rotate, forcing the monitor to rotate with respect to the host in a first direction. A second fine-tuning key is electrically connected to the fine-tuning control circuit board. When the second fine-tuning key is operated, the fine-tuning control circuit board drives the second rotating shaft to rotate, forcing the monitor to rotate with respect to the host in a second direction.

Abstract: The present disclosure provides a flat panel display device. A flat panel display device includes a display panel, a stand, and a multi-angle adjusting device. The multi-angle adjusting device includes a first shell fixed on the stand, a second shell cooperatively defining a receiving space with the first shell, a holder, a first motor, a second motor, and a third motor. The holder, the first, the second, and the third motors are received in the receiving space. The first motor is connected between the first shell and the holder, and rotates the holder about a first direction along the stand. The second motor is connected between the holder and the second shell, and moves about a second direction perpendicular to the first direction relative to the first shell. The third motor is connected between the second shell and the display panel, and rotates about a third direction which is perpendicular to the first and second directions.

Abstract: An apparatus for controlling an electric motor is provided. A plurality of switches is provided for controlling a direction of current through motor coils of the electric motor. A brushless motor control circuit is connected to each of the plurality of switches. Responsive to a request to adjust one of an angular velocity and an angular acceleration of the electric motor, the plurality of switches are activated to place the motor coils in a predetermined configuration to maximize torque or reduce a total back electromotive force (BEMF) from the motor coils.

Abstract: A control system for determining a line pull of a winch. The system comprises a first sensor configured to measure a torque generated by the winch to retract a cable and a second sensor configured to measure a number of layers of the cable retracted by the winch, wherein a layer of the cable is formed by a single wrap of the cable onto a container. The system further comprises a monitoring circuit coupled to the first and second sensors, wherein the monitoring circuit is configured to determine the line pull of the winch based on the torque generated by the winch and the number of layers of cable retracted onto the container.

Abstract: To provide a mechanism in which a moving body can be stored in a housing. A gate valve has a slide plate and a moving mechanism for changing the positions in the radial and axial directions of the slide plate. A shaft is a rotating shaft the axial displacement of which is controlled by an axial driving mechanism and the angle of rotation of which is controlled by a radial driving mechanism, and is tumably supported in the housing by a shaft supporting spring consisting of a magnetic bearing and a conical coil spring. By controlling the attraction force of a balance weight in an electromagnet, the shaft can be moved in the radial direction. Also, by controlling the attraction force of an electromagnet target in the electromagnet, the shaft can be moved in the axial direction.

Abstract: An engine output controller provided in a bulldozer includes an output curve storage device storing a plurality of output curves of an engine and an output curve changing device selecting and shifting to one of the plurality of output curves. The output curve changing device, when a pressure of a blade tilt cylinder is equal to or more than a predetermined value, calls and shifts to a higher output curve from the output curve storage device. When an oil pressure is supplied to the tilt cylinder to tilt a blade and an operation is performed without reducing a soil pressing speed in this condition, the output curve changing device shifts the current output curve to the higher output curve to drive the engine. However, in many other cases, the output curve is automatically switched to a lower output curve to reduce an output of the engine. Thus, the fuel consumption is improved.

Abstract: A hybrid power plant for efficiently propelling a vehicle is described. In particular, an internal combustion motor and a generator capable of producing electrical energy is mechanically coupled to the internal combustion motor. An electrical motor is powered by the generator and a controller is coupled to the generator, providing control of the rate of electricity provided to the electrical motor by the generator. Here the electrical motor facilitates rotation of a wheel of the vehicle and the internal combustion motor is operated at an idle or near-idle speed to provide sufficient energy to be converted into electrical energy by the generator, thereby enabling the electrical motor to propel the vehicle in excess of sixty miles per hour, without engaging the internal combustion motor to the wheel and without drawing energy from the battery.

Abstract: A device and method for controlling the changing operation of an on-load tap changer (LTC) that interrupts current passing the current zero point of a commercial frequency are provided. The device may include a current zero point detecting unit that detects a zero point in the waveform of current passed through the LTC, a current zero point cycle measuring unit that measures the cycle of the current zero point detected by the current zero point detecting unit, a commercial frequency determining unit that generates an output signal when the cycle of the current zero point measured by the current zero point cycle measuring unit corresponds to a commercial frequency, and an actuation signal output unit that outputs an actuation signal used to have the LTC carry out tap changing operation in response to the output signal of the commercial frequency cycle determining unit.

Abstract: A motor control device includes a motor, a control portion controlling the motor, estimating a heating temperature of the motor on the basis of an electric current value and an energizing time period or a stopping time period of the motor, and restricting an electrification of the motor in a case where the estimated heating temperature becomes equal to or greater than a limit value, and a temperature sensing device for detecting a temperature of a predetermined portion of a vehicle, wherein the control portion estimates an initial temperature of the motor when an engine is started on the basis of a temperature signal outputted from the temperature sensing device and determines the limit value on the basis of the estimated initial temperature.

Abstract: A movable barrier operator having control circuitry (206) to selectively cause movement of a corresponding movable barrier (203) and a power supply that is operably coupled to a mains (201) and is operably coupled to provide electrical motive power to components of the operator can be configurable to selectively disconnect a portion, but not all, of the power supply from the mains when full power availability for the components is not required. This power supply can comprise a less efficient first power supply (204) and a more efficient second power supply (205). In such a case, these teachings can provide for disconnecting (105) the first power supply from the mains when a higher level of power is not presently required. Meanwhile, the second power supply can continue to provide operating power to, for example, the aforementioned control circuitry to ensure ongoing functionality of the movable barrier operator.

Abstract: The fan speed control circuit and system of the present invention includes a capacitor or internally triggered triac to enable current to flow across the terminals of an electrical switch for a fan motor when the switch is in the open and OFF position to permit continued operation of a fan so that the system complies with the ASHRAE 62.2 standard. The capacitor may be of a fixed value so that the speed of the fan motor is reduced to a fixed level when the switch is open and OFF. Alternatively, a potentiometer and internally triggered triac arrangement may be used to permit adjustment of the level to which the speed of the fan drops to when the switch is actuated to the open and OFF position. The present invention is a viable less expensive option to prior art microprocessor based fan speed control circuits.

Abstract: A controller for a motor cleans, as necessary, a hydraulic chamber that generates hydraulic oil for changing a phase difference between two rotors so as to restrain sludge from building up in the hydraulic chamber. A motor has a first rotor and a second rotor that can be relatively rotated with respect to the first rotor. The controller includes a phase difference changing driver that changes the phase difference between the two rotors by controlling the pressure in the hydraulic chamber filled with hydraulic oil. The controller further includes a cleaning need determiner that determines the need for cleaning the hydraulic chamber, and a cleaning phase difference controller that controls the phase difference changing driver such that the second rotor is relatively rotated in the forward direction and the reverse direction alternately with respect to the first rotor if a determination result of the cleaning need determiner is affirmative.

Abstract: A door opener error-start prevention device, the output shaft of the door opener is formed as a hollow accommodation portion, a pair of axial sliding slots are formed on the periphery, and a sliding pin radially inserted; a pair of elastic elements, abutting against the sliding pin from both ends, the outer end of each elastic element fixed by a bolt; a sprocket assembly is rotationally invaginated on the output shaft, one end having a sprocket , the other end formed with a pair of V-shaped slots corresponding to the sliding slots on the output shaft, both ends of the pin engage in the V-shaped slot to drive the sprocket. When an error start of the door occurs, the door returns to the original position by actuation of an obstacle sensing device actuated by the sliding pin, the sensitivity of which is adjusted by a bolt at the outside of the output shaft.

Abstract: A method for driving a vibration cutter includes inputting an alternate current in an actuator section to vibrate a plate-like blade connected to the actuator section, wherein the blade section is vibrated in a plate face direction and a thickness direction of the blade section.