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Topic: Actuator

In the News (Sun 12 Oct 08)

Angelina Jolie

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	ETI Systems - Potentiometers, Linear Control Potentiometers, Joysticks, Electronic Valve Actuators
		ETI's patented VA series of Valve Actuators set a new standard in proportional valve control.
		Rugged, cost effective and simple to install, these actuators can be integrated into a wide variety of flow process applications where, until now, the choices have been limited.
		ETI Valve Actuators are widely used for mission critical applications in industries like oil refining, water treatment, chemical processing, and pharmaceuticals.
	www.valveactuator.com (137 words)

	Actuator products
		An actuator is a device or mechanism which transform an input signal (mainly an electrical signal) into motion.
		their newest addition to the family of linear actuators; the size 14 hybrid linear actuators are now available with a 0.9 degree step angle.
		Recognized world leader in stepper motor based linear actuators, ball screw and lead screw products, Haydon has custom designed and manufactured electric dc motors and switches for almost half a century for use in sophisticated medical equipment, instrumentation, machinery automation, or wherever precise x-y positioning, rapid motion control and long life are needed.
	www.motioncontrol.com /actuator (1048 words)

	Translatory actuator unit - Patent 7081731
		A translatory actuator unit including a translatory actuator module that moves an object straightly, a force sensor that detects a load applied to the translatory actuator module, and a servo control module that controls a speed, a position and/or output power of the translatory actuator module.
		The translatory actuator unit according to claim 1, the translatory actuator module comprising: a driving motor; a mechanism for converting rotational movement of the driving motor into translatory movement of the translatory actuator module; and an encoder that detects a rotational speed and/or a rotational angle of the driving motor.
		In the translatory actuator unit according to the embodiment of the present invention, the translatory actuator module and the servo control module are integrally configured, and the force sensor using the elastic supporting member is installed at a lower part of the translatory actuator unit.
	www.freepatentsonline.com /7081731.html (3341 words)

	Lightweight actuator in a computer mass memory storage device - Patent 5729406
		Actuator 5 includes various components, including E-block 16, actuator or suspension arms 12 with flexures 13 and read/write heads 14 attached thereto, bearing 24 (which is often implemented as a cartridge bearing), voice coil motor 15, and the associated electronic interface cable (not shown) to drive electronics 6.
		In a typical example of a typical two platter 2.5" hard disk drive, actuator 5 weighs 4 to 6 grams, of which 1 to 2 grams is contributed by ball bearing 24 and 1.5 to 2 grams is contributed by E-block 16, excluding the wire for the voice coil motor 15.
		The output torque is a function of the friction of bearing 24, the inertia of actuator 5, and the electrical resistance of the coil of voice coil 15.
	www.freepatentsonline.com /5729406.html (5715 words)

	Actuator
		An actuator is an electronic device controlled by a motor that moves the head arm to where it needs to go.
		In the past the actuator within a hard disk drive was controlled by a stepper motor.
		However, today the actuator is commonly controlled by a servo motor.
	www.computerhope.com /jargon/a/actuator.htm (84 words)

	Actuator patent invention (Site not responding. Last check: )
		For example, an actuator disclosed in Japanese Patent No. 2633066 has a driving rod which is fixed to an end face of a piezoelectric element, and which slidably supports a lens barrel.
		[0005] An actuator disclosed in Japanese Patent Application Laid-open No. 10-232337 has an engaging member attached to an end face of a piezoelectric element in the displacement direction, and the engaging member is frictionally engaged with a moving plate to which a lens barrel is attached.
		[0013] In the actuator according to the present invention, since the driving member is formed in a block shape, the vibration of the piezoelectric element is transmitted to the driven member without being attenuated by the driving member, as a result of which the driven member can be accurately moved.
	www.freshpatents.com /Actuator-dt20051215ptan20050275314.php (1077 words)

	Actuator solenoid, linear actuator solenoid
		For linear actuator solenoids that are capable of both continuous and intermittent duty, force ratings vary widely by duty cycle.
		A core of actuator solenoid is provided which is improved in durability and at the same time ensures high energy efficiency of the actuator solenoid.
		The core of the solenoid actuator attracts an armature during operation of the actuator solenoid.
	www.hvacplus.com /actuator-solenoid1-498.html (566 words)

	Head Actuator
		The actuator is the device used to position the head arms to different tracks on the surface of the platter (actually, to different cylinders, since all head arms are moved as a synchronous unit, so each arm moves to the same track number of its respective surface).
		The actuator is a very important part of the hard disk, because changing from track to track is the only operation on the hard disk that requires active movement: changing heads is an electronic function, and changing sectors involves waiting for the right sector number to spin around and come under the head (passive movement).
		Voice Coils: The actuator in a modern hard disk uses a device called a voice coil to move the head arms in and out over the surface of the platters, and a closed-loop feedback system called a servo system to dynamically position the heads directly over the data tracks.
	www.storagereview.com /guide2000/ref/hdd/op/actActuator.html (1437 words)

	Actuator ball electric valve- actuator electric small
		The actuator ball electric valve has the manual override direct to the valve to eliminate potentially hazardous conditions.
		This eliminates slow manual actuation through actuator gearing, and if the gear train is jammed, the manual override will still function properly.
		The actuator electric small ball valve has been designed to provide positive leak tight shut off and directional control of fluids in process and instrumentation applications, the three-way ball valve may be used as a diverter or selector valve.
	www.hvacplus.com /actuator-ball-electric-valve-492.html (387 words)

	QuickPack Piezoelectric actuator price list
		When the actuator is being operated as a strain actuator (e.g., bonded to a surface) it can operate over a very broad frequency range, from zero to at least 20 kHz.
		The actuator can be operated at frequencies above this range, but the deflections are greatly influenced by the structural dynamics of the actuator and do not respond linearly to the input voltage.
		This is not a concern in most applications, but if the actuator is exposed to high environmental temperatures or will be driven at high power levels (often associated with high frequencies), you should try to monitor the actuator temperature to avoid overheating.
	www.mide.com /quickpack_poweract/qp_faqs.html (1329 words)

	RRG Research Actuator Testbeds
		The goal of this research was to generalize actuator test data in the form of performance maps, which would document the characteristics of each family of motor types (SRM, BLDC, etc.), with a range of rated output power, under dynamic load operations.
		A collection of performance maps is our approach to representing the complexity of the actuator response (in both the model and the sensor data) and also provides metrics for measuring the actuator state.
		In order to complete the actuator test architecture considering all the possible situations, a dynamic and nonlinear test environment was required.
	www.robotics.utexas.edu /rrg/research/actuator (1386 words)

	Actuators for Diesel Engines
		The actuator is effectively a positioner with an integral driver, which will accept a position command signal from another device in the system such as a speed control.
		The EM-80 and EM-300 gear-motor actuators are intended to be mounted on large diesel, gas, and gasoline engines, and on all types of turbines, to control the position of engine fuel racks, turbine fuel valves, turbine and turbocharger variable geometry, and to handle timing control.
		The TM-55 is an integrating type actuator used for controlling diesel and gas engines or steam and industrial applications of gas turbines, and is designed for use with an adapter directly to Woodward liquid and gas fuel valves.
	www.woodward.com /engine/diesel/diesel2/actuators.cfm (1235 words)

	Delphi Variable Bleed Actuator for Transmissions
		The Delphi Variable Bleed Actuator for Transmissions is a current-controlled linear electro-hydraulic actuator that produces an output pressure as a precise function of the applied current for main line pressure control.
		This type of actuator can also be used for hydraulic applications that require a linear relationship between current applied and controlled pressure.
		The Delphi Variable Bleed Actuator for Transmissions is a three-port design which integrates the supply to control port in the valve housing.
	www.delphi.com /manufacturers/auto/sensors/et/varbleed (502 words)

	Understanding The Actuator
		The actuators performance is normally limited by the electric motor for maximum force and as well for duty cycle.
		The actuator is made from aluminum with the exception of the rod, which is steel with Nitrotec processing, which gives superior corrosion resistance.
		For actuator with 90 volt motor supplied by a rectifier it is a good idea to have a current limiting relay before the rectifier (AC side).
	www.american-actuator.com /aaindepth.htm (1791 words)

	Rotating disk storage device with improved actuator arm patent invention (Site not responding. Last check: )
		In this head moving device, two actuator arms are connected together and the connection between the two actuator arms is folded so that the two actuator arms oppose each other to form a single component.
		When the actuator arm is insert-molded using this plastic mold, the protruded portions provided on the inner surface of the pivot opening in the actuator arm abut on the insert pin of the plastic mold with no clearance therebetween.
		Further, the second actuator arm includes a pivot opening, into which the pivot bearing assembly is inserted and which has a second hole diameter that is smaller than the first hole diameter.
	www.freshpatents.com /Rotating-disk-storage-device-with-improved-actuator-arm-dt20051201ptan20050264942.php (2362 words)

	Actuator Characteristics
		Since random accesses require the heads to move over the surface of the disk to the correct location, and the actuator controls this process, the actuator assembly is the primary influence on the drive's seek time.
		Today, improvement is evolutionary, done by increasing the strength of the actuator itself, reducing the weight and size of the actuator arms and sliders, and tweaking other design parameters.
		The reason is that the actuator has an impact on cylinder switch time, which is a component of sustained transfer rate.
	www.storagereview.com /guide2000/ref/hdd/perf/perf/int/mechActuator.html (238 words)

	Electromagnetic Actuator Control Using DSP
		To meet today’s application demands for precise actuator control from both position and dynamic points of view, an actuator system requires a cost-effective controller with the flexibility and speed to process complex control algorithms.
		The modulation of the current according to a predefined profile permits control of the instantaneous electromagnetic force generated by the electromagnet and thus of the movement and position of its core.
		Block Diagram at bottom of page illustrates an electromagnetic actuator containing the DSP controller, a power stage with feedback sensors, and electromagnet coil that is controlled by one member of the Freescale DSP56F80x family.
	www.freescale.com /webapp/sps/site/application.jsp?nodeId=02nQXGjr49 (958 words)

	REMOTE CONTROL
		The spring return actuator features a spring module with the spring(s) safely contained and epoxy powder coated for maximum corrosion resistance.
		The rack and pinion design provides constant torque in the double acting version, as required in some valve types, and a linear characteristic in the spring return version.
		The 400 Series actuators have adjustable travel stops in both direction + or - 5 degrees.
	www.rciactuators.com (350 words)

	Actuator Manufacturers On B2BChinaSources.Com from China Actuator Manufacturers & Taiwan Actuator Suppliers & Actuator ...
		Actuator Manufacturers On B2BChinaSources.Com from China Actuator Manufacturers & Taiwan Actuator Suppliers & Actuator Exporters
		All qualify Actuator made in China & Taiwan factories are listed for their high quality, innovative design, competitive prices and low cost manufacturing service.
		China Actuator Manufacturers & Chinese actuator suppliers & exporters.
	www.b2bchinasources.com /China-Manufacturers-16039/Actuator.htm (228 words)

	Actuator - Blurtit
		www.flowquip.com Electro-hydraulic Actuators for liquid or gas service.
		This is a valve with an actuator, which is usually used in pneumatic applications, such as set on a timer to dishcarge water...
		A Valve positioner is basically a critical link between a plants’s controlling element and the control valve of the final...
	www.blurtit.com /listings.php?query=Actuator&search_type=content&ad=639016432&kid=3120150 (261 words)

	ASEPCO Actuator FAQs
		All ASEPCO actuators are Electropolished and Passivated to provide a clean, smooth and corrosion resistant surface.
		All pneumatic actuators have travel stops to prevent over-travel, if too much air is applied.
		Yes, a manual or pneumatic actuator (of the same size) are interchangeable.
	www.asepco.com /pages/faqs/actuatorFaqs/actuatorFaqsAll.php (628 words)

	Linear actuator - SKF Linear Motion products
		The SKF linear actuator is cost effective and guarantees high performance.
		SKF produces a complete range of actuator products (linear actuators, telescopic pillars, electromechanical actuators, ball screw actuator, linear actuator motor,etc...) designed to satisfy the most demanding requirements.
		The CAR linear actuator is a unique standard of performance, durability and reliability.
	www.linearmotion.skf.com /linear-actuator.html (130 words)

	Von Weise Satellite Dish Actuators - Stallions Satellite and Antenna
		In addition, Von Weise actuators are exceptionally quiet, operate in adverse environmental conditions, such as icing, salt, and sand, and offer a selection of premium actuators to meet your requirements.
		The heart of any actuator is the quality of the gearmotor that drives the actuator arm.
		A Von Weise actuators give you many value-added features, such as internal limit switches, a 48 pulse per inch magnet wheel for pinpoint accuracy, an environmental weather boot, a zinc plated acme screw to prevent rusting, a ball clamp with grease fitting, an extremely quiet ball-bearing motor and a 600lb load capacity.
	www.tvantenna.com /products/satellite/cband/actuators/vonweise.html (347 words)

	Joint Stiction Actuator (SimMechanics)
		The Joint Stiction Actuator block applies stiction (classical friction) to a prismatic or revolute joint primitive.
		You cannot actuate a joint primitive simultaneously with a Joint Stiction Actuator and a Joint Actuator.
		You can also simultaneously actuate a joint primitive with a Joint Stiction Actuator and measure the force/torque along/around the joint primitive with a Joint Sensor.
	www.weizmann.ac.il /matlab/toolbox/physmod/mech/jointstictionactuator.html (871 words)

	MachineDesign.com: Toward the Instant-On Actuator (Site not responding. Last check: )
		A typical magnetic-solenoid actuator is axisymmetric, because it has a central axis around which all its parts are revolved, including its cylindrical plunger armature made of solid steel.
		In many cases their motion must be rapid, which means the magnetic actuators and/or sensors must respond quickly when turned on.
		So it is useful to understand the basic steps for how most magnetic actuators energize: First, the energizing voltage turns on and the coil current rises, delayed in part by an electrical time constant.
	www.machinedesign.com /ASP/viewSelectedArticle.asp?strArticleId=60816&strSite=MDSite&Screen=CURRENTISSUE&CatID=3 (1820 words)

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