Abstract: Embodiments herein describe a DTG printing environment that uses autonomous robots to move garments between DTG processing stages (e.g., retrieval stages, pretreatment stages, printing stages, drying stages, etc.). Doing so removes the dependency of DTG printing process on the stage that consumes the most time. In one embodiment, the DTG processing stages or the autonomous robot include an actuator for moving the garment and the DTG processing stage closer together. In one embodiment, the processing stage includes a lift (e.g., an actuator) that lifts a detachable carrier from the robot on which the garment is mounted. The lift can level and rotate the detachable carrier to provide a fine alignment between the garment and the DTG processing stage. While a lift is specifically disclosed, in other embodiments, the actuator could be disposed on the robot to lift up the garment.

Abstract: A moving member of a machine can include a cold plate that serves as a primary structural member for the moving member. The cold plate can have one or more cooling channels formed within the cold plate. A plurality of armature windings can be fixed to the cold plate. One or more field windings can be fixed to the cold plate. A plurality of ferromagnetic cores can be fixed to the cold plate, each ferromagnetic core positioned within a loop of at least one of the plurality of armature windings. Other embodiments are described.

Abstract: An actuator may include a drive motor, an actuatable output, and a sensor for sensing a first sensed parameter in or around the actuator. The first sensed parameter may have a first sensed parameter value that can change with time. The actuator may also include electronics that may identify a first identified value representative of the first sensed parameter value and increment a first counter value when the first identified value falls within a first range of values, and increment a second counter value when the first identified value falls within a second range of values.

Abstract: A method and system for detecting and reporting component failures in a linear drive system may identify failed position sensors, failed position magnets, and failed drive coils in the linear drive system. As a mover travels along a track segment in the linear drive system, signals corresponding to the position of the mover and to the current commanded in each drive coil are stored. Analysis of the stored signals identifies whether one of the position sensors along the track segment, one of the position magnets on the movers, or one of the drive coils, used to propel the movers along the track, has failed.

Abstract: A linear compressor includes, a cylinder, a piston configured to reciprocate inside the cylinder, a motor configured to supply driving force to the piston, a detector configured to detect a motor current and a motor voltage that are applied to the motor, and a controller configured to estimate a stroke of the piston based on the motor current and the motor voltage and to determine a phase difference between the stroke and the motor current. The controller is configured to detect operation information of the linear compressor, determine whether to perform a resonance operation based on the operation information, and control operation of the motor to allow the phase difference to be within a preset phase range.

Abstract: A system may include a processing engine and an analog-to-digital conversion interface subsystem communicatively coupled to the processing engine. The processing engine may be configured to process feedback data converted from analog feedback data to digital feedback data, wherein the feedback data includes a plurality of data stream sequences converted from the analog feedback data to the digital feedback data at a sample rate and based on processing of the feedback data, generate digital control signals for controlling a system under control. The analog-to-digital conversion interface subsystem may be configured to flexibly control the processing of the processing engine and the generation of digital control signals by the processing engine to minimize latency in the generation of the digital control signals due to processing of the processing engine.

Abstract: A system (500) for controlling a linear alternating current (AC) electrodynamic machine (400) includes a linear AC electrodynamic machine (400) with a stationary part (410) with a plurality of discrete stationary sections (412, 414, 416), each stationary section (412, 414, 416) having a poly-phase circuit; a variable frequency drive (VFD) (510) configured to be coupled to a utility power source and to provide output currents, wherein the VFD (510) is operable coupled to the stationary part (410) of the linear AC electrodynamic machine (400) for powering and controlling the stationary sections (412, 414, 416) of the stationary part (410); and a plurality of switches (512, 514, 516) coupled between the VFD (510) and the stationary part (410), wherein the plurality of switches (512, 514, 516) allow connecting or disconnecting the VFD (510) to or from the stationary sections (412, 414, 416).

Abstract: Embodiments of the disclosure provide a tool and method for alignment adjustment of machinery. The tool may include a bottom plate, a top plate oriented in parallel planes, a low friction intermediate element between bottom plate and top plate, and a hydraulic actuator or electro-mechanic actuator arranged between the bottom plate and the top plate and capable of moving the top plate relative to the bottom plate.

Abstract: High force and low noise linear fine-tooth motors are described herein. Such motors can include armatures having fine teeth separated by narrow slots such that a ratio of a pitch between teeth and a pitch between permanent magnet poles is less than that of a conventional iron-core linear motor. In one embodiment, such a linear motor can include a first component having an armature including a plurality of iron cores surrounded by coil windings, and a second component having a plurality of permanent magnets with alternating polarity. The plurality of iron cores can be spaced apart from one another by an iron core pitch distance and the plurality of permanent magnets can be spaced apart from one another by a permanent magnet pole pitch distance, and a ratio of the iron core pitch to the magnetic pole pitch can be less than 1.33.

Abstract: Control over the operation of an electrically-controlled motor is supported by an interface circuit between the electrically-controlled motor and a near-field radio frequency communication controller. The interface circuit includes a first circuit that receives at least one control set point through a near-field radio frequency communication issued by the near-field radio frequency communication controller. A second circuit of the interface generates one or more electric signals in pulse width modulation based on the control set point.

Abstract: An apparatus includes a lens assembly that includes at least one lens that defines an optical axis, a lens holder coupled to the lens assembly, a substrate, an image sensor disposed on the substrate, and an actuator coupled between the lens holder and the substrate and configured to adjust a position of the substrate relative to the lens assembly to reposition the image sensor along the optical axis. The apparatus also includes a position sensor that includes a magnet and a magnetic field sensor. The position sensor is coupled to the substrate and the lens holder. The magnetic field sensor is configured to generate magnetic field data indicating a position of the substrate relative to the lens holder. The apparatus additionally includes circuitry configured to control the actuator based on the magnetic field data to place the image sensor within a depth of focus of the lens assembly.

Abstract: A direct drive drive actuator includes a base structure and a driven structure that is journally supported and translatable relative to the base structure. The driven structure is disposed in a fixed spacial relationship to the base structure. A plurality of first pole arrays is disposed on the driven structure. A plurality of second pole arrays, corresponding in number to the plurality of first pole arrays is disposed on the base structure. An electrical power source is provided. A controller is coupled to the power source and the first plurality of pole arrays and the second plurality of pole arrays, wherein the controller is configured to selectively electrically energized windings of the first plurality of pole arrays and the second plurality of pole arrays such that an electro-magnetic force is formed between poles of the first plurality of pole arrays and poles of the second plurality of pole arrays.

Abstract: In order to allow for more flexible process control of a transport apparatus in the form of a long stator linear motor, in particular in order to at least intermittently increase the maximum achievable speed of a transport unit without changing the energy-related basic conditions (maximum current or maximum voltage) of the transport apparatus, according to the invention, in order to change a magnetic flux in the magnetic circuit during movement of the transport unit along the transport route, a magnetic reluctance of the magnetic circuit is changed and/or a magnetomotive force of the magnetic circuit is changed on the transport unit.

Abstract: Method for operating a transport apparatus that utilizes a long stator linear motor, the method includes moving a transport unit along a transport route of the long stator linear motor, causing drive magnets arranged on both sides of a main body of the transport unit to interact, at least in a region of a transfer position for transferring the transfer unit between two opposite route portions of the transport route, with drive coils of the opposite route portions of the transport route in order to generate a propulsive force (Fv), utilizing the drive magnets of the transport unit and the drive coils of the transport route of the long stator linear motor as sources of magnetomotive force of a magnetic circuit that develops at least in the region of the transfer position on both sides of the transport unit, and transferring the transport unit between the opposite route portions of the transport route in the transfer position by changing on at least one side of the transfer unit a magnetic flux (?1, ?2) of the m

Abstract: A rigid-flexible coupling motion platform driven by a ball screw includes a base, a linear guide rail fixed to the base, a rigid-flexible coupling platform, a servo motor, a ball screw, a guide rail sliding block, a displacement sensor and a driving controller. The rigid-flexible coupling platform includes a frame and a workbench. The frame and the workbench are connected through a flexible hinge; the servo motor is configured to drive the ball screw; the workbench is connected with the ball screw; the frame is connected with the linear guide rail by the guide rail sliding block; the displacement sensor is configured to feed back the position of the workbench; and the driving controller controls the ball screw to drive the workbench to move according to different control modes. The advantages of the ball screw drive and the rigid-flexible coupling motion platform are fully combined, and the positioning precision of the platform is greatly improved.

Abstract: The vibrator comprises a vibration block, and the vibration block comprises at least one permanent magnet, the stator comprises conductive blocks, and the conductive blocks are subjected to the effect of a magnetic field force which is the same as and/or opposite to the vibration direction of the vibrator. When the vibrator is in a balanced state, the resultant force of the magnetic field force is zero. When the magnetic conductive blocks are subjected to the effect of an excitation force to perform a relative displacement relative to the vibrator in the vibration direction of the vibrator, a direction of the resultant force of the magnetic field forces is the same as the direction of the relative displacement, a magnitude of the resultant force of the magnetic field forces has a proportional relationship with a magnitude of the relative displacement. The conductive blocks are used to replace the stator coils.

Abstract: A linear system includes a linear unit and a motor adapted to drive the linear unit so as to perform a linear movement. A system for detecting the position of the linear unit includes an absolute encoder which is connected to the motor. The absolute encoder is configured so as to detect a position of the linear unit based on a movement of the motor.

Abstract: An endoscope apparatus includes an endoscope including an observation optical system including a lens drive mechanism and a video processor connected to the endoscope, and the endoscope apparatus includes a voice coil motor provided in the endoscope and configured to drive a lens relating to the lens drive mechanism and a position detecting apparatus provided in the endoscope and configured to detect a position of the lens. The video processor is configured to determine whether or not the position detecting apparatus is in a heat generating state, and halt actuation of the position detecting apparatus if the video processor determines that the position detecting apparatus is in the heat generating state.

Abstract: An actuator has a first stator with four first poles, a second stator with four second poles aligned with the four first poles, a permanent magnet between the first stator and the second stator, four armatures positioned at terminal ends of the aligned four first poles and four second poles, and coils wrapped around the first stator and the second stator. A controller selectively applies current to the coils to migrate flux created by the permanent magnet through selective poles of the first stator and the second stator to selectively alter air gap sizes associated with the four armatures.

Abstract: A carriage on which a workpiece is supplied and which is transported by a transport path has a reference member that is a reference for positioning of the workpiece. The carriage also has a fixing unit, whose motion is controlled by a control unit provided outside the carriage, that fixes the workpiece. The workpiece, which has been positioned in a first direction on the carriage and has not yet been fixed by the fixing unit, is pressed in a second direction against the reference member by a positioning unit, in which the second direction intersects with the first direction, and the workpiece is positioned on the carriage in the second direction.

Abstract: A transport system includes: a mover having a first magnet group arranged in parallel to a first direction and a second magnet group arranged in parallel to a second direction crossing the first direction; and a plurality of coils arranged in parallel to the first direction so as to be able to face the first magnet group and the second magnet group, and the mover is able to move in the first direction along the plurality of coils by electromagnetic force received by the first magnetic group from the plurality of coils while an attitude of the mover is controlled by electromagnetic force received by the first magnetic group or the second magnetic group from the plurality of coils.

Abstract: An invention relates to a field of oil production, in particular, to installations with displacement pumps driven by submersible linear electric motors, and can be used for production of stratum fluids from a marginal well stock from great depths. The described technical solution implementation ensures unification of a design with simultaneous increase in a manufacturing processability by means of involving of easily removable interoperable modules for its manufacture. Also a described embodiment contributes to decrease in a pump unit dimensions. According to the described embodiment of the invention a telemetry system performance provides an increase in a level of protection from a high-voltage interference with implementation of a hardware-software mode of a surface control unit for checking an insulation. Providing that an arrangement of the described design ensures a reduction in dynamic loads on elements of an electrical motor design and contributes to increase in its operating resource.

Abstract: Various embodiments relate to magnetically moveable displacement devices or robotic devices. Particular embodiments provide systems and corresponding methods for magnetically moving multiple movable robots relative to one or more working surfaces of respective one or more work bodies, and for moving robots between the one or more work bodies via transfer devices. Robots can carry one or more objects among different locations, manipulate carried objects, and/or interact with their surroundings for particular functionality including but not limited to assembly, packaging, inspection, 3D printing, test, laboratory automation, etc. A mechanical link may be mounted on planar motion units such as said robots.

Abstract: A hygienic magnetic tray and conveyor. The low-profile tray includes a forcer sandwiched between an article-supporting top and an opposite bottom. The top is made of hygienic material, and the bottom can be made of a low-friction material. The tray is propelled along a guide surface on an enclosure housing stator coils supported in a conveyor frame. The stator forms a linear motor with the forcer in the tray. Roller balls protruding from the bottom of one version of the tray provide low-friction rolling contact with the guide surface. Various disposal systems provide escape routes for removing fluids and debris from the guide surface of the stator enclosure.

Abstract: To select the configuration of a linear motor more appropriately. A motor configuration selection device according to the present invention comprises a characteristic calculation unit that calculates at least one of force and magnetic attraction to be achieved by a component of a linear motor based on a gap between a field magnet and an armature in the linear motor to be selected.

Abstract: Control architecture for use with transport systems, such as linear drive systems, rotary drive systems, or a combination thereof, comprising a computer system having a controller for operating control system software for receiving input commands and protocols for creating a motion profile for each transport element, and a gateway for receiving the motion profile from the control system software and for operating gateway drive software that functions to select the appropriate drives to move each transport element along one or more tracks in accordance with their motion profiles.

Abstract: A conveyance system includes a plurality of coils arranged so as to form a row at a predetermined pitch, a carriage configured to move along the row through use of an electromagnetic force received from the plurality of coils as a driving force, a plurality of drivers configured to cause an electric current to flow through coils to be controlled among the plurality of coils to provide the driving force to the carriage, and a controller configured to switch the coils to be controlled, which are assigned to each of the plurality of drivers, among the plurality of coils. As the coils to be controlled, which are assigned to each of the plurality of drivers, among the plurality of coils, coils for each predetermined interval of at least two pitches based on a distance between carriages determined in advance are assigned to each of the plurality of drivers.

Abstract: The present invention relates to a driving control of a voice coil motor (hereinafter, referred to as ‘VCM’) which moves lens of a camera module, more particularly to a driving control method for VCM capable of reducing the noise generated at the time of initial driving or landing of the lens and reducing the moving time thereof, and the method is characterized by and include the steps of: applying a linearly increasing current with a first slope to the VCM up to a pre-set first inflection point in response to a camera operation-on command; and moving the lens to an infinite position by applying a linearly increasing current with a second slope less steep than the first slope to the VCM from the first inflection point to the infinite position.

Abstract: Sections of a linear motor track can each include a single power sensor configured to detect a power current in an erroneous state and one or more reference sensors configured to detect reference currents in erroneous states. The power sensor can be arranged between multiple drive coils of a section and a DC power rail (or “mid-bus”) for the drive coils. The power sensor can produce a single isolated output to a processor for the section, and the processor, in turn, can compare the output to a threshold for determining an error. The one or more reference sensors can be arranged between lower switches and a DC-reference bus, thereby providing a DC-referenced sensing signal for the drive coil currents. By referencing the processor to the same rail as the DC-referenced current sensing circuit, the reference sensors can produce outputs to the processor without any need for isolation.

Abstract: A linear motor control apparatus has: a plurality of coil units; a plurality of position detecting units for detecting positions of a plurality of trucks which move over the plurality of coil units; a plurality of deviation calculating units for operating deviation information as differences between the detected truck positions and a target position of the detected truck; a plurality of position control units for operating current control signals based on the deviation information; a plurality of current control units for supplying driving currents to the coil units based on the current control signals; and a switching unit for switching the position control units to which the deviation information is transmitted or switching the current control units to which the current control signals are transmitted.

Abstract: There is described an apparatus for forming opening devices on a sheet packaging material for packaging pourable food products; the apparatus comprises conveying means for advancing the packaging material along a given path, at least one molding unit arranged along the path and adapted to mold one opening device on a receiving portion of the packaging material, and at least one movable element carrying the molding unit and advanced parallel to at least a portion of the path to allow the molding unit to form the opening device while the packaging material is being advanced along the path.

Abstract: A printer includes a processor; a conveying motor that can operate in any one of a plurality of excitation modes, the conveying motor being configured to convey a printing medium; and a printhead that prints on the printing medium on the basis of printing data, wherein, with respect to each of at least some of the plurality of excitation modes, the processor estimates a strength value of a vibration that would be caused by said conveying motor when the conveying motor is operated in said excitation mode at a first conveying speed that is set based on the print data, and selects one of the plurality of excitation modes for actually operating the conveying motor based on the estimated strength values of the vibrations for the at least some of the plurality of excitation modes.

Abstract: A conveyor system for conveying electrically conductive articles such as aluminum cans. The conveyor system comprises a plurality of coils below the top surface of an electromagnetic conveyor at a junction between an infeed conveyor and a discharge conveyor. The coils propagate electromagnetic flux waves that induce currents in the electrically conductive articles that force the articles to follow a conveying path from the infeed to the discharge conveyor. Dead spots on the electromagnetic conveyor can be eliminated by adjusting the coil drive waveforms.

Abstract: A drive device for providing a drive movement, including a drive motor designed to convert provided electric or fluidic energy into a movement of a motor element, further including a drive sensor assigned to the drive motor and designed to detect the movement of the motor element and to provide a drive sensor signal, and further including a transmission device coupled to the drive motor and designed to convert the movement of the motor element into a drive movement of a drive element, wherein the transmission device is assigned a movement sensor for the detection of the drive movement, the movement sensor being electrically connected to the drive sensor The movement sensor is assigned a detection device designed for the detection of component data and for the provision of detected component data to the movement sensor.

Abstract: A linear motor actuator includes a plurality of stators mounted stationary relative to one another along a common actuation axis. A translator rod is mounted to the stators for linear motion relative to the stators along the actuation axis, wherein each stator is magnetically coupled to the translator rod to drive motion of the translator rod along the actuation axis.

Abstract: This invention relates to a linear actuator, comprising an electric motor (10), a worm gear (13, 14), a transmission (15, 16, 19), an outer tube (2) and a spindle (12), said spindle (12) being in connection with the transmission (15, 16, 19), a spindle nut (11) on the spindle (12), a thrust bearing (20) for supporting a shaft end (21) of the spindle (12), wherein the connection between the shaft end of the spindle (12) and the transmission (15, 16, 19) allows a mutual axial movement so that axial forces are only lead through the spindle (12) bypassing the transmission (15, 16, 19) and directly to the thrust bearing (20), wherein a support structure (17, 18, 24, 28) fixedly connects the outer tube (2) and a lower bracket (20, 22), wherein said worm gear (13, 14) drives a shaft (19) included in said transmission (15, 16, 19), which shaft (19) has a driving gear wheel (15) fixedly attached thereto, arranged to transmit torque to a driven gear wheel (16) fixedly attached to the spindle (12), wherein said transmis

Abstract: The underlying invention relates in particular to a forming machine, having an electromagnetic linear motor with a linear mover and multiple coil units each with a predetermined coil pole pitch (S) which is measured in the direction of the movement axis. The linear mover includes, in an alternating arrangement along the longitudinal axis (L) thereof, first permanent magnets which are magnetized transversely to the longitudinal axis with a predetermined first magnetic pitch (T1) and second permanent magnets which are magnetized in the direction of the longitudinal axis (L) with a predetermined second magnetic pitch (T2), wherein a ratio of coil width (S) to first magnetic pitch (T1) is 3:1, and wherein a ratio of first magnetic pitch (T1) to second magnetic pitch (T2) is 2:1.

Abstract: A wireless power supply system is a wireless power supply system provided with a travel lane for wirelessly transmitting power to a moving body and includes a power transmitting coil that is disposed such that the axial direction of the coil is substantially parallel to the width direction of the travel lane, and electromagnetic shielding walls that are disposed on the respective sides of the travel lane in the extension direction of the travel lane.

Abstract: A numerical controller for controlling a machine tool including a spindle motor formed of an induction motor includes: a storage unit that stores a maximum acceleration at which the spindle motor can operate when a magnetic flux amount of the spindle motor reaches its maximum; a magnetic flux amount acquisition unit that acquires a present magnetic flux amount of the spindle motor; and an acceleration change unit that changes an acceleration of a position command based on a maximum acceleration of the spindle motor stored in the storage unit according to a magnetic flux amount at the start of movement of the spindle motor acquired by the magnetic flux amount acquisition unit when the spindle motor is operated by position control using a position command.

Abstract: An actuator according to one embodiment of the present invention may include a fixed member and a free member. The free member is operatively engaged with the fixed member so that the free member is moveable with respect to the fixed member. The actuator also includes means for moving the free member with respect to the fixed member. An elastic element operatively associated with the free member and the fixed member is operable to store energy without a change in an overall length of the actuator.

Abstract: A system for monitoring a motor includes a movable component having a plurality of permanent magnets. The system also includes a plurality of stators having phase windings and surrounding the movable component. The system also includes a plurality of current sensors each configured to detect a detected current flowing to a corresponding stator of the plurality of stators. The system also includes a monitor configured to receive the detected current, perform a comparison of the detected current from each of the plurality of stators, and to identify a loss of redundancy of the motor based on the comparison.

Abstract: A half-bridge inverter comprised of upper and lower switches can be placed in linear motor track sections to alternately connect a common point of all drive coils to a full-bus DC power rail (“full-bus”) and a DC reference, according to PWM command signals, functioning as a “virtual mid-bus” to allow bi-directional flow of a sum of currents of all drive coils in the section. Separate upper and lower drive switches of the half-bridge inverters that are also connected to drive the drive coils can then be controlled, according to separate PWM command signals, to synchronize their PWM cycles and duty cycle commands with respect to the virtual mid-bus at times when a mover is not present, resulting in zero voltage across the drive coils, or command different duty cycles with respect to the virtual mid-bus when a mover is present, resulting in a desired voltage across the drive coils. The desired voltage can produce a current in the drive coils to electromagnetically propel the mover.

Abstract: An ultrasound system includes a display, an actuator, a user interface, and a processing circuit. The actuator is configured to control at least one of a position or an orientation of the display. The user interface is configured to receive a user input. The processing circuit is configured to cause the actuator to adjust the at least one of the position or orientation of the display based on the user input.

Abstract: A method for dynamically calibrating an image capture device comprises: a) determining a distance (DCRT, DEST) to an object within a scene; b) determining a first lens actuator setting (DACINIT) for the determined distance; c) determining a second lens actuator setting (DACFOCUS) providing maximum sharpness for the object in a captured image of the scene; and d) storing the determined distance (DCRT, DEST) and the first and second lens actuator settings. These steps are repeated at a second determined distance separated from the first determined distance. A calibration correction (ERRNEARPLP, ERRFARPLP) for stored calibrated lens actuator settings (DACNEARPLP, DACFARPLP) is determined as a function of at least: respective differences between the second lens actuator setting (DACFOCUS) and the first lens actuator setting (DACINIT) for each of the first and second determined distances; and the stored calibrated lens actuator settings are adjusted according to the determined calibration corrections.

Abstract: A stator segment for a linear motor-based transport system is developed to the effect that a transmitter for cyclic transmission of a control data record in a first clock cycle also transmits, in addition to transmitting the control data record, a position value in a clock-synchronized manner, wherein a plurality of positions are available as a sequence with a quantity of elements and an element with an index corresponds to a position, where the transmitter unit is configured such that, upon every first clock cycle, the index is incremented commencing from a starting value and an element is transmitted after the control data record, where the transmitter unit is furthermore configured to transmit all elements in one transmission interval, and where the transmission interval corresponds to a multiple of the first clock cycle.

Abstract: Aspects of the invention provide methods and systems for moving a plurality of movable stages relative to a stator. The stator comprises a plurality of coils shaped to provide pluralities of coil trace groups where each coil trace group comprises a corresponding plurality of generally linearly elongated coil traces which extend across a stator tile. Each movable stage comprises a plurality of magnet arrays. Methods and apparatus are provided for moving the movable stages relative to the stator, where a magnet array from a first movable stage and a magnet array from a second movable stage both overlap a shared group of coil traces. For at least a portion of the time that the magnet arrays from the first and second movable stages overlap the shared group of coil traces, currents are controllably driven in the shared coil trace group based on the positions of both the first and second movable stages. The positions of the first and second movable stages may be ascertained by feedback.

Abstract: An inkjet printing apparatus includes an inkjet print head arranged to be moveable in a direction of movement along a guiding assembly. The guiding assembly includes a support structure; a strip mounted on the support structure, the strip being rigidly straight in a first direction substantially perpendicular to the direction of movement and mounted in such way that a straightness in the direction of movement is provided; and an air bearing system operatively coupled to the strip. The strip extends in a vertical plane, the vertical plane being substantially parallel to the direction of movement and being substantially parallel to the first direction. The air bearing system is configured to control a position of the inkjet print head in a horizontal plane relative to the strip during movement of the print head in the direction of movement, the horizontal plane being substantially perpendicular to the vertical plane.

Abstract: A planar motor rotor displacement measuring device and its measuring method are provided. The motor is a moving-coil type planar motor. The device comprises probes, two sets of sine sensors, two sets of cosine sensors, a signal lead wire and a signal processing circuit. The method is arranging two sets of magnetic flux density sensors within a magnetic field pitch ? along two vertical movement directions in the rotor located in the sine magnetic field area. Sampled signals of the four sets of sensors are respectively processed with a frequency multiplication operation, four subdivision signals are obtained, the zero-crossing points of the four subdivision signals are detected, and then two sets of orthogonal pulse signals are generated. The pulse number of the orthogonal pulse signals is counted, and phase difference of the two sets of orthogonal pulse signals is respectively detected.

Abstract: Systems and methods for generating currents in a plurality of CTS that may be independently controlled by a microprocessor. In some cases, a DC power source (such as a battery) is connected to each inverter. In other cases, a rechargeable DC power source (such as a capacitor) is connected to each inverter. Multiple controllable, turn-less structures may be provided in a suitable configuration with a single, main control processor or alternatively, with both a main control processor and several intermediate level command modules, each intermediate level command module coupled to a respective one of the inverters to control currents through each conductor of the respective inverter.

Abstract: A linear actuator assembly (30) having an inner sleeve (100) which moves in a first direction or in an opposite second direction relative to a fixed outer sleeve (90) between a fully extended position and a fully retracted position. The linear actuator assembly (30) also has an emitter (180) and a sensor (184) positioned near the emitter (180) that detect changes in an emitted signal resulting from the movement of the inner sleeve (100) relative to the outer sleeve (90) along a longitudinal axis and a controller (101) electrically coupled to the sensor (184) to determine the axial position of the inner sleeve (100) relative to the outer sleeve (90) along the longitudinal axis.