Reaction means for servo motors price.
For use with a servomotor mechanism having a power device, means controlling said power device, force transmitting means operatively connected to said power device, said force transmitting means including a confined flowaible medium arranged for pressurization upon actu ation of said power device, and reaction means operatively connected to said controlling means and to said force transmitting means to sense a proportionate amount of the pressurization of said flowable medium.
Selection of the optimum motor to use in a motion control application is the first part of a larger motion control system problem. It is the selection segment that usually causes the most problem because the electrical engineer must crossover to the mechanical side of motion to match or select the optimum motor and its associated feedback device. There are many practical constraints that the user or applications engineer must determine in the actual motor selection process. These include the following motor supplier attributes: performance; price; reliability; delivery capability; technical support; reputation/history; system compatibility; documentation; and user friendliness. The performance and price attributes are the major focus of this paper with reliability (in terms of motor-load operation) an important collateral attribute. This paper provides a selection criteria for any type of electric motor that is used in a precision velocity and/or position motion system.
Compact physical sizes, direct-drive designs, stainless-steel versions, planetary gear heads—even onboard drives are among developments helping to keep servo motor technology fresh from year to year. They come in many shapes, sizes, and configurations—from large slow-speed, direct-drive rotary torque motors to sleek, compact units with low rotor-inertia for optimum acceleration and deceleration of loads, to frameless motors, to linear motors providing high thrust force under extreme acceleration and speed. Combined with modern servo drives that incorporate advanced control algorithms, today's servo motors offer users the highest level of motion control for myriad applications.
The description of brushless motors as trapezoidal and sinusoidal arises from the shape of the back emfs produced by the stator windings. This chapter discusses the form and control of the stator current. The motors are referred to as the squarewave and sinewave types. In order to ensure a unidirectional output torque, the current in the stator conductors of the brushless motor must be in the same direction relative to that of the rotor pole flux. Furthermore, there are two types of brushless motor and several types of sensor, giving many possible combinations. The combination used in practice is chosen partly according to its cost effectiveness for the application in hand. The choice is also affected by the potential scale and future development of the application. Sinusoidal drive systems are generally more expensive than the trapezoidal type, and there is a great difference between the price of an absolute and an incremental encoder. In general, the least expensive sensors are used with trapezoidal motors.
Modern externally powered upper-body prostheses are conventionally actuated by electric servomotors. Although these motors achieve reasonable kinematic performance, they are voluminous and heavy. Deterring factors such as these lead to a substantial proportion of upper extremity amputees avoiding the use of their prostheses. Therefore, it is apparent that there exists a need for functional prosthetic devices that are compact and light-weight. The realization of such a device requires an alternative actuation technology, and biological inspiration suggests that tendon based systems are advantageous. Shape memory alloys are a type of smart material that exhibit an actuation mechanism resembling the biological equivalent. As such, shape memory alloy enabled devices promise to be of major importance in the future of dexterous robotics, and to prosthetics in particular. This thesis investigates the issues surrounding the practical application of shape memory alloys as artificial muscles in a three fingered robot hand.
Servo motors are widely used in many industrial applications. These motors require precise control of acceleration, speed, and position. Different designs can be found in the literature. This paper will compare the response of two of the common types and will propose a new servo motor design that uses a smaller amount of magnet, lowering the price of the motor. The proposed motor would be able to save energy for the required application (minimize the cost of the industrial process) and would be suitable for high-frequency injection based self-sensing techniques.
In order to improve the low speed stationary of continuous rotary electro-hydraulic servo motor and avoid the pressure impact in the sealed cavity during the oil distribution, based on fluid and solid interaction theory, this paper adopted ADINA to analyze the pressure field distribution of sealed cavity in certain radial and axial gap, the computed model of the motor was established, and the pressure change of sealed cavity under the given dimension of the buffer groove was analyzed. The result shows that the pressure changes stably and buffer grooves dimension is reasonable, which lays foundation for the structure design and experimental research of large displacement servo motor and improve the low speed performance of continuous rotary electro-hydraulic servo motor.
The solution involves the use of two or more motors to drive a common mechanism. The single control loop includes a position sensing device coupled to only a first of the plurality of servo motors and generating a position signal. A signal comparator receives the position signal and compares the position signal with a predetermined desired position based on a desired motion profile. The difference from the actual position and the motion profile is output as a position error signal. A signal converter receives the position error signal and derives a conversion signal based on the error signal. The conversion signal is provided to a plurality of signal amplifiers, which in turn are coupled to the plurality of servo motors. The amplifiers provide power to the motors for driving the mechanical load.
An object of the present invention while performing high accuracy position adjustment of the optical module, and in order to allow the servo motor can be easily manufactured. A optical module 120 is position adjustment for the light-receiving element 150UL for receiving the reflected light from the concentric slit CS1 of the rotary disc 110, 150UR and, these position adjustment for the light-receiving element 150UL in the radial direction, and concentric circles in a different position from the 150UR It is provided with a position adjusting light receiving element 150D for receiving reflected light from the slit CS2. Position adjusting light receiving element 150UL, by driving the rotary motor 175 so that the output of the 150UR are substantially equal, to perform position adjustment of the inclination direction of the optical module 120.
Provided are an assembly block with a servomotor and an assembly block kit, which enable assembly of various works without requiring special parts used for a drive shaft only. An assembly block 100A with a servomotor according to the present invention includes: a block main body 1 having connection means including a protrusion 17 or a recessed portion; a servomotor 2; and a rotation shaft 3 rotationally driven by the servomotor 2. The assembly block 100A with the servomotor is connectable to another assembly block by fitting the connection means to connection means of the another assembly block. The assembly block 100A with the servomotor includes a rotary block 4 which is formed of a polyhedron, has, on a surface thereof, connection means including a recessed portion or a protrusion, and is fixed to one end of the rotation shaft 3 and rotates.
A differential pressure operated servo booster has a valve comprising a flexible closure member carried by a movable wall and cooperating with a pair of annular valve seats formed on a valve body which is movable by an input rod. The valve body is formed in two coaxial parts, the outer part having the pair of valve seats and the inner part being connected to the input member, a spring being arranged between said inner and outer parts to resiliently urge the outer part against the valve closure member. Reaction is therefore determined by the spring and not by the force with which the valve seats are urged against the closure member. Assembly of the booster is facilitated by providing an inner valve body of two-part construction. There is also disclosed an adjustable abutment between a fulcrum plate which contacts the movable wall and an output member. Such adjustability provides for ease of initial adjustment of the booster.
In a fluid-pressure operated servo-motor in which an output force applied to an output member is augmented by differential pressures applied to opposite faces of a movable wall, a one-piece reaction plate of corrugated outline is interposed between the input and output members and the movable wall. In use the reaction plate transmits a load from the movable wall to the output member and transmits a reactive proportion of the output load back to the input member.
The present specification describes and claims a servo-motor for vehicle brakes. The servo-motor has two contiguous fluid-tight compartments separated by a movable wall which is formed by a flexible diaphragm, a deflector plate and a fulcrum plate. The deflector plate comprising radially outwardly extending circumferentially spaced fingers, acts with the fulcrum plate to control a valve assembly for governing the fluid flow into and out of one of the compartments, the fulcrum plate being connected to an output rod of the servo and extending to beyond the perimeter of the deflector plate to afford support for the diaphragm when under pressure.
A housing for servo motors for vehicle braking systems is disclosed having an easily fabricated housing member in the end wall of the housing for carrying output rod sealing means. The housing member has an annular lip which cooperates with an annular lip on the end wall of the housing and forms a location therebetween to house a second seal.
The invention relates to a monitor system for a servo controller used in connection with servo motors utilized in multivarious machines, such as machine tools. In addition to detecting a servo system fault when the difference between the commanded position and the actual position exceeds a predetermined value, the system monitors several servo system parameters to distinguish between different causes of servo faults. Identifying the source of the fault leads to improved maintenance and decreased system down time when a fault occurs.
The encoder accumulates rotation angles using multiple rotation data obtained by counting the number of revolutions of the rotary shaft using a rotation signal indicating the rotation of the rotation shaft of the motor for one rotation and an angle signal indicating the rotation angle of the rotation axis, And a cumulative multiple rotation data obtained by counting the number of revolutions of the rotary shaft each time the axis makes one revolution, and generating a first multiple revolution data using the rotation signal; A second cumulative number calculation unit that calculates first cumulative multi-rotation data using the angle signal; and a second cumulative number calculation unit that calculates first cumulative multi-rotation data by using the angle signal A second cumulative number calculating unit that calculates second cumulative multi-rotation data, a second cumulative number calculating unit that calculates a second cumulative number of rotations of the first cumulative number of rotation.
For servo motors, it's not location, location, location. It's position, position, position—or more accurately position and force or torque. The two together determine a servo motor's cost and suitability for a particular task. Generally, greater positioning accuracy is more expensive; greater torque is also more costly. In addition to position and torque, an important factor to keep in mind when buying a servo motor is associated software. Of particular importance is how easy software is to use. Support also is important, technical and otherwise, along with ability of a motor to operate in a given environment. Combined, these elements determine which servo motor is best for an application.
A differential pressure operated servo booster has a valve comprising a flexible closure member carried by a movable wall and cooperating with a pair of annular valve seats formed on a valve body which is movable by an input rod. The valve body is formed in two coaxial parts, the outer part having the pair of valve seats and the inner part being connected to the input member, a spring being arranged between said inner and outer parts to resiliently urge the outer part against the valve closure member. Reaction is therefore determined by the spring and not by the force with which the valve seats are urged against the closure member. Assembly of the booster is facilitated by providing an inner valve body of two-part construction.
An encoder includes a first substrate including a point light source that emits light onto reflective slits formed on a disc and a light-receiving element that receives light emitted from the point light source and reflected by the reflective slits, a second substrate onto which the first substrate is mounted, a lustrous connecting portion configured to electrically connect the first substrate and the second substrate, and a covering material configured to cover the connecting portion in the manner that the point light source and the light-receiving element are exposed. And a servo motor is also provided.
A servo selection system is provided with a replacement information display means that displays at least a portion of replacement information corresponding to an entered pre-replacement servo product, and to a selected new-model servo product. The replacement information contains: a difference between a specification of the entered pre-replacement servo product and of the selected new-model servo product; and a work procedure for replacing the pre-replacement servo product with the selected new-model servo product.
A key trend for stepper motor design is delivering improved "servo-like" motion performance, while maintaining a competitive price advantage over other offerings. Stepper motor suppliers are refining their product designs to deliver more torque at high speeds, better microstep-ping solutions and features such as optional encoder feedback that emphasize motion performance.
A fluid control valve having a pair of blades arranged one above the other in superimposed relation for relative movement in parallel planes, each of said blades including means having a generally concave edge, and said concave edges when arranged in opposed overlapped relation cooperating with one another to define an opening whose size varies with the degree of overlap. Simultaneous movement of both blades is such that the edges of the openings therein move either toward or away from one another to vary the size of the opening without appreciably displacing the center thereof. A suitable reciprocating actuator serves as the means for simultaneously actuating both blades, one of said blades being directly connected thereto while the other is operatively associated with the blade so-connected.
The paper presents a method to control the speed of the asynchronous motors, using stator current vector control by sinusoidal phase-current inverter, including tranzistors. The control diagram represents a modified diagram of the vector control with only one coordinates transformation. In this way it is possible to avoid the acquisition of the fundamental flux wave. Vector control was realized in a low cost electronic side optimal from the point of view of the speed computation and of the simplicity, with a dedicated 16 bit microcomputer in a uniprocessor structure, while the current control loops, for the same reasons, still remaining analog. Experimental results obtained with this diagram, comparable to those obtained with complex control diagram, are also presented. Good dynamic behaviour in wide speed range, similar to a d.c. drive was attained, allowing the use of the asynchronous motors drives for spindle and servo drives of the machine-tools and industrial robots. This solution assures field weackening at high speeds to economize gear trains.
Stepper motor drives exhibit advantages like open loop capability, high torque density and lower cost with respect to other brushless servo alternatives. However, the typical performances of conventional open loop stepper motor drives are limited, making them unsuitable where high speeds, fast dynamics and smooth motion is required. They are also easily prone to stall and usually produce loud audible noise. Recently, the increasing price of rare earth materials used in permanent magnets is making the use of high-quality PMSMs prohibitive when medium requirements are present. To achieve performances comparable to those of a servo drive, vector control is applied, since the hybrid stepper motor can be considered as a special case of the PMSM, characterized by the presence of two phases and a high pole count (usually 50 pole pairs). Removal of the position/speed sensor is therefore highly desirable to maintain low system costs.
Introduction The price of fuel has almost doubled over the last year and a half. Up to this point, fuel has been relatively inexpensive. Most companies weren't concerned about fuel conservation, fuel efficiency, mpg, or gph (gallons per hour) when operating a piece of construction equipment or a mobile vehicle. That has changed. Now the world has record high fuel prices and fuel conservation and fuel efficiency are openly being discussed. This has led construction equipment manufacturers and any mobile vehicle suppliers, who normally are using full hydraulic systems, to try to find ways to make their hydraulic systems or mobile vehicles more fuel efficient. We all know about the Toyota Prius hybrid automobile, but what about the Caterpillar D9E electric dozer? There are now more mobile equipment manufacturers moving from full hydraulics to electro-hydraulic systems. A electro-hydraulic system is simply the integration of an electric motor or servo motor to a hydraulic pump, along with the necessary electronics and controls.
The preferred embodiment of the invention comprises a motion time-lapse photography device. The device includes an outer enclosure, base, motor, controlling circuitry, stepper-motor, a plurality of gears, a backlash mitigation membrane, and an external interface panel. Embodiments of the motion time-lapse photography device enable the capture of a sequence of photographs at an interval in coordination with axial movement in at least one rotational degree of freedom of a photographic capture device attached to the motion time-lapse photography device.
Aiming at the performance detection of servo drive system, introduce a detection method of the servo drive system and establish a detection platform. Through analyzing software and hardware for the system, make an experiment by using the SWAI-SC series drivers with their motors and the SWAI-FA superior control system. The result shows that the program is reasonable and feasible. Compared to similar products on the market applications, the system has both a very high performance and low price.
A headrest and headrest positioning system reduces whiplash injuries from rear impacts by properly positioning the headrest behind the occupant's head either continuously, or just prior to and in anticipation of, the vehicle impact and then properly supports both the head and neck. Sensors determine the location of the occupant's head and motors move the headrest both up and down and forward and back as needed. In one implementation, the headrest is continuously adjusted to maintain a proper orientation of the headrest to the rear of the occupant's head. In another implementation, an anticipatory crash, is used to predict that a rear impact is about to occur, in which event, the headrest is moved proximate to the occupant. A pre-inflated airbag within the headrest automatically distributes the pressure to evenly support both the head and neck.
A first stage adapted to be moved in predetermined directions by a first driving device is provided in a machine base supported from a foundation by an intermediary of resilient means. This first stage is provided a second stage adapted to be moved in the directions at right angles to the directions of movement of the first stage by a second driving device. Upon movement of these respective stages, vibration of the machine base is excited by reaction forces exerted upon the machine base as a result of acceleration and deceleration. These reaction forces are offset by resistive forces generated by first and second force generators respectively. The first and second force generators establish an electromagnetic coupling between the foundation and the machine base. The first force generator is made to act against the first driving device, and the second force generator is made to act against the second driving device, in such manner that the first and second force generators generate forces directed in the opposite.
A reliable, cost effective motion simulator system wherein a motion platform controlled by three inexpensive fractional horsepower induction AC motors to provide n-axis of motion where n is two, three, four, five or six. A dynamic boost is applied to maintain the position of the motion platform at low speed or zero speed and to handle transient motion demands without use of an encoder. The personal simulator motion base includes a support structure for positioning a rider coupled to the motion platform. A support pedestal and a plurality of linkages support the motion platform. A plurality of motor assemblies 114 is coupled to the motion plate by the linkages. A control algorithm enables the use of low cost power electronics to drive the AC motor-linkage assemblies. The personal simulator may be controlled in response to user-initiated commands, remote-user initiated commands or by commands embedded in game software or the audio track of a video stream.
A printer is used in combination with a verifier for verifying the quality of print such as bar codes. The printer can be controlled to provide proper printing functions for printing in response to the verifier input. The printer, upon receipt of a particular report from the verifier, can stop the printing such as barcode printing as to a bad label, overstrike a bad label, or reprint the label. Further, the printer can be controlled by operator intervention on a control panel or by automatic input through the controller of the printer to provide for the respective necessary and correct print or bar codes being printed.
A reliable, cost effective motion simulator system wherein a motion platform controlled by three inexpensive fractional horsepower induction AC motors to provide n-axis of motion where n is two, three, four, five or six. A dynamic boost is applied to maintain the position of the motion platform at low speed or zero speed and to handle transient motion demands without use of an encoder. The personal simulator motion base includes a support structure for positioning a rider coupled to the motion platform. A support pedestal and a plurality of linkages support the motion platform. A plurality of motor assemblies 114 is coupled to the motion plate by the linkages. A control algorithm enables the use of low cost power electronics to drive the AC motor-linkage assemblies. The personal simulator may be controlled in response to user-initiated commands, remote-user initiated commands or by commands embedded in game software or the audio track of a video stream.
A printer is used in combination with a verifier for verifying the quality of print such as bar codes. The printer can be controlled to provide proper printing functions for printing in response to the verifier input. The printer, upon receipt of a particular report from the verifier, can stop the printing such as barcode printing as to a bad label, overstrike a bad label, or reprint the label. Further, the printer can be controlled by operator intervention on a control panel or by automatic input through the controller of the printer to provide for the respective necessary and correct print or bar codes being printed.
An apparatus that is capable of achieving self-stabilization while walking comprises two front legs and two rear legs with each leg having three joints including a hip joint, an upper leg joint, and a lower leg joint. Each joint is powered by a motor and is monitored by an encoder, totaling twelve of each for the entire apparatus. Stability is maintained by adding weight to the two front legs and by positioning a separate weight toward the front and middle of the apparatus, thereby moving the center of balance of the apparatus further within the stability envelope of the apparatus. As a result, the apparatus maintains its stability by itself without the need for additional CPU's. The apparatus also includes an animation motor that is capable of causing the apparatus to make non-ambulatory movement and a cartridge slot which allows the user to download new programming which facilitates new behavior being exhibited by the apparatus.
