Motion Control

Introduction to Linear Actuators

Students trained in classic mechanical engineering are taught to construct a system using conventional mechanical components to convert rotary into linear motion. Converting rotary to linear motion can be accomplished by several mechanical means using a rotary motor, rack and pinion, belt and pulley, and other mechanical linkages, which require many components to couple and align. Although these methods can be effective, they each carry certain limitations.

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Fluid Handling Products Gain in Performance, Efficiency

Today’s pumps, valves, and flow meters are being designed with greater accuracy and flexibility to handle a wide range of fluids, chemicals, and other materials. Demands for more reliable operation and lower energy usage dictate these parts be made of materials lighter than previously available, yet robust enough for high pressure, high duty cycle applications.

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Hermetic Feedthroughs Critical for Flywheel Energy Storage

Next-generation flywheels are made possible by advances in material science in rotor technology, as well as the application of magnetic bearings running in a vacuum environment. While the movement of the rotating flywheel into a vacuum eliminates parasitic drags, such as windage friction losses, mechanical bearings are not suited to operate in a vacuum or for the high speed requirements of the new designs.

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Motion Control Advancements Ease Medical Procedures

Whether performing an intricate surgery, positioning a patient, or taking a tissue sample, today’s biomedical devices are taking advantage of advanced motion control devices to ensure accurate control and movement in biomedical applications. Robots are making it possible to perform surgical procedures not only with higher precision than before, but in less time and with less pain and suffering for the patient. Moreover, improvements in the design and packaging of motors and other control components are making it possible to shrink biomedical devices and make it easier to perform procedures in tight, confined spaces.

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Slip Clutches Solve Diverse Design Problems

Slip clutches are commonly used to protect against overloads, but they can solve many other problems as well. Their applications include increasing machine speeds, applying constant tension to webs or wires, indexing a mechanism, holding a hinged object in position, controlling torque on capping or assembly operations, and providing soft starts or cushioned stops.

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Magnetostrictive Sensing Ensures Accurate Level Monitoring

For process industries, one of the greatest challenges plant operators face is finding a sensor technology that will provide reliable measurement of liquid levels in tanks while requiring minimal attention and maintenance.

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Multi-turn Encoders Find Home in Industrial Applications

Single-turn encoders have long been used in industrial automation to gauge angular displacement in a broad range of applications, ranging from steering control on a mobile equipment vehicle to boom extensions. A single-turn encoder is a transducer that precisely measures angular displacement over 360 degrees and assigns a value to each position. These values can be decimal, binary or grey code, and systems typically offer up to 17–bit resolution.

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