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5206568 |
Coordinated control of stepper motors
An automated multi-purpose analytical chemistry processing center and laboratory work station having a movable table for supporting microtiter plates and other fluid receptacles, a movable arm, and...
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5206571 |
Stepper motor controllers
A driver for a stepper motor including means (Q45, 45, 47, 402) for sampling the current in a motor winding (43) at an instant determined by means (401, 400)for generating a predetermined delay...
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5198741 |
Drive control system of stepping motor
A drive control system for a stepping motor which stores values for the current driving each phase of the motor in data tables. A central processing unit drives the motor in accordance with the...
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5196777 |
Stepping motor drive control system
In a stepping motor drive control mechanism, a step drive command is applied sequentially at irregular intervals to drive a stepping motor. When the step drive command is to the stepping motor the...
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5194795 |
Drive system and a control unit therefor
A drive system capable of driving a driven member with a large force and precisely rapidly positioning the same is disclosed, with use of a control unit for efficiently driving a motor with a large...
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5194796 |
Micro-step drive system of a five-phase stepping motor
A micro-step drive system of a five-phase stepping motor is disclosed. When Io is a constant, a unit time interval is 1, a remainder obtained by a time variable divided by 10 is t and an arbitrary...
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5194793 |
Control device for controlling a plurality of servo motors and servo motor controlling method
A servo motor control device includes a commanding section for outputting a move command signal to drive and control a plurality of servo motors. An interpolating section is provided for performing...
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5185627 |
Electrophotographic printer with media motion motor control
An electrophotographic printer 10 having a control system 51 for controlling a stepper motor 50. The control system 51 includes a motor speed drive circuit 52, a microprocessor 54, and a clock 58....
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5182507 |
Stepping motor driving circuit having failsafe function
A driving circuit for driving a stepping motor has a plurality of excitation coils, a plurality of excitation transistors for driving the excitation coils of the stepping motor, respectively, and...
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5181429 |
Headlamp positioning device
A headlamp positioning device having a stepping motor and a sensor for detecting loss of steps in the motor. An electronic controller operating in open-loop with the motor automatically reinitiates...
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5177422 |
Recording control system for a recording apparatus
The present invention relates to control of motor and strobe pulses in a printer which feeds a paper by a stepping motor and prints data by strobe pulses. A uniform record line density is attained...
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5175482 |
Stepping motor control circuit
A stepping motor control circuit (50) has a step circuit (51) and a track circuit (52). The track circuit has an up-down counter (1) including an offset circuit (11), and a decoder (2). The offset...
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5164650 |
Control device for stepping motor
A control device for driving a stepping motor having a plurality of coils is provided with timing control means for inserting a quiescent time into a phase signal for actuating energization of the...
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5157515 |
Image reading apparatus using a plurality of phase excitation modes
An image reading apparatus includes a reading unit for reading the image and a stepping motor for moving the reading unit. The stepping motor is excited and driven in one of a plurality of phase...
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5155427 |
Drive controller for stepping motor
A drive controller of the N-phase stepping motor includes a signal generator for generating M pulse signals at such an interval that the stepping motor can be driven in response to the pulse...
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5151640 |
Scanning device having a memory for storing driving steps for a stepping motor
A scanning device comprises: a stepping motor; a memory device for storing drive data for driving the stepping motor for each scanning unit which does not correspond to each drive step of the...
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5132603 |
Stepping motor
A stepping motor comprises a rotor, a stator, coils for magnetizing the stator, and a controller for controlling the excitation of the coils to control the rotation of the rotor. The rotor is...
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5126764 |
Sheet transport unit for recording systems
In a sheet transport unit for recording systems which uses a pulse motor to feed a recording sheet quantitatively and intermittently, multiple different current apply intervals are specified within...
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5117171 |
Method and apparatus for controlling a stepping motor
A stepping motor having independently energizable windings for respectively producing magnetic fields at right angles to each other and directed at the axis of a rotor having a fixed polarity...
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5111242 |
Image forming apparatus having a more smoothly controlled image forming element
An image forming apparatus for producing a visible image on an image forming medium includes a photosensitive drum for carrying a latent image thereon, a developer for developing the latent image...
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5107194 |
Stepper motor control to vary output torque
A mechanical drive system with different load requirements is enabled by a motor whose input is varied in response to known changes in output torque requirements during various time segments of the...
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5105140 |
Peristaltic pump motor drive
The present invention provides a drive signal for a peristaltic pump motor. A first circuit is provided which generates a first series of pulses at a given frequency. A second circuit is provided...
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5103151 |
Method for driving a stepping motor
In a stepping motor having a plurality of phase windings, a phase-angle range of an electrifying signal for each of the phase windings is made smaller than 180°, and a counterelectromotive voltage...
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5100120 |
Cut-sheet feeder control method
A method of controlling a cut-sheet feeder installed on a printer to feed a cut sheet from a sheet hopper (1) included in the cut-sheet feeder to the printing unit of the printer at a sheet feeding...
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5087867 |
Motor driving apparatus and printer
An apparatus which controls a plurality of motors and/or print heads, such as motors used in printers or the like, includes a microprocessor which outputs selection signals on one of its output...
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5087868 |
Rotary actuator
A rotary actuator is designed for rotatingly drive a rotary body, such as a rotary valve member for adjusting damping force to be created by a variable damping force shock absorber. The rotary...
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5084661 |
Position control system for information storage system
A position control system for an information storage system, for example, an optical disc system, includes a stepping motor for moving a read-write head and a DC motor for moving a beam reflecting...
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5084663 |
Control arrangement for a reluctance motor
A control arrangement for a reluctance motor, comprising stator poles (11a, b; 12a, b) provided with windings (13a, b; 14a, b) which cooperate in pairs, and a rotor (15) made of soft magnetic...
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5083230 |
Access mechanism for magnetic disk apparatus
A disk recording/reproducing apparatus is provided with a reference-point detection capability, including a device for stopping a carriage at an originating point. A control section supplies pulses...
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5079653 |
Information storage disc transducer position control system using last step damping
The output of the ring detector is used to change or control the timing of specially generated torque damping pulses which are fed to the stepper motor at the end of a SEEK step sequence. These...
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5077511 |
Stepper motor drive for way flow end station
An apparatus is described which controls the movement and positioning of a platen on which wafers may be mounted. The apparatus comprises a stepper motor having a motor sprocket member operatively...
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5072166 |
Position sensor elimination technique for the switched reluctance motor drive
Rotor position information for a switched reluctance (SR) motor drive is obtained indirectly in response to the motor phase inductance. An oscillator generates a signal having a time period that is...
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5068586 |
Steeping motor driving apparatus
A stepping motor driving apparatus includes a stepping motor and a pulse output circuit for outputting drive pulses for driving the stepping motor. A pulse generator generates further pulses which...
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5063339 |
Stepping motor driving device
In a four-phase stepping motor driving apparatus phase-A and phase-A, or phase-B and phase-B are prevented from simultaneously becoming conductive. A device for this includes a change-over circuit...
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5063338 |
Power module for electronic control of a DC motor
A power supply module for control electronics of a DC motor, the module comprising a power cell of the stepdown type controlled as a function of peak current, the current flowing in both...
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5061888 |
Method and apparatus for driving stepping motor
A driving apparatus for a stepping motor with a rotor and a plurality of windings, adapted for reduction of fluctuation of the rotor, comprises a driver responsive to drive control data for...
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5059883 |
Method and apparatus for driving stepping motor
A drive apparatus is disclosed which is designed to switch/excite a plurality of excitation windings of a stepping motor in a predetermined order. Periodic velocity fluctuation data of the stepping...
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5060093 |
System for controlling displacement of a head in a disc storage unit
A system for controlling the displacement of a head to reduce access time in a disc storage unit having a multiphase stepping motor. While the disc storage unit receives a series of pulses...
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5055761 |
Smooth rotation by a galvanometer
A method and device for smoothly rotating a diffraction grating in a spectrophotometer by means of a galvanometer includes modifications in the software in the microprocessor which controls the...
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5051679 |
Step motor control device
A step motor control device for controlling a performance of a step motor by outputting a plurality of phase of pulses, having a keyboard for inputting a number of steps for the performance of the...
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5051678 |
Drive device for a reciprocating part
A drive device for a reciprocating part having a part which is connected to a stepping motor whose direction of rotation can be changed. The stepping motor is reciprocatingly actuated in a single...
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5045767 |
Rotating display element and display unit using the same
A rotating display element which is provided with a display surface member having four display surfaces which are selected by rotating the display surface member, and a display unit which uses the...
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5043649 |
Stepping motor unit and rotary control valve incorporating the same
A stepping motor unit includes a stepping motor of the type wherein the interior of the stepping motor is filled with an oil, a detector for detecting the temperature of the oil in the stepping...
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5041773 |
Drive circuit for stepping motor
A drive circuit for a stepping motor which seeks the read/write head of an FDD or the like to a predetermined track. The drive circuit includes a plurality of exciting coils for providing exciting...
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5040084 |
Disk drive system and method
Method and apparatus is provided for writing and reading data from a rotatable disk. Utilizing the apparatus of the present invention, the method includes the steps of formatting the disk with a...
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5038088 |
Stepper motor system
An electrical stepper motor system is provided in which a microcomputer controlled driver monitors the real time operating parameters of the stepper motor. The driver is controlled by the...
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5034622 |
Power supply interface apparatus for communication facilities at a power station
A power supply board for connecting dry communication lines from a remote station to the electronic equipment at a power station and includes a brushless PM motor mounted in a motor section of the...
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5034674 |
Motor driving voltage control device
A voltage control device for controlling a driving voltage applied to a motor having a plurality of phases is provided with a switching circuit for changing the motor driving voltage from one...
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5032781 |
Method and circuit for operating a stepping motor
In a method and circuit for operating a stepping motor having several windings, and wherein a movement of the stepping motor induces a voltage in a winding which is not required at the time for...
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5032779 |
Driving circuit for stepping motor
A drive circuit for a stepping motor used for seeking the reading/writing head of a floppy disk or the like. The stepping motor is smoothly driven by inserting an inner step pulse between the input...
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