Motion Control

Trends in Hydraulic Filtration

Proper filtration plays an important role in ensuring that hydraulic systems operate trouble-free. High-performance filters maintain the cleanliness of the hydraulic fluid over its entire service life. In addition, designers are faced with ever-changing application requirements — longer filter change intervals, higher operating safety, increased separation efficiencies, and increased compatibility with the new generation of hydraulic oils. Following is an overview of some important technologies and trends in the industry, and their impact on users of hydraulic systems.

Posted in: Articles, Manufacturing & Prototyping, Materials, Fluid Handling, Joining & Assembly, Mechanical Components, Motion Control
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LEARNING TO CRAWL: Origami Robot Moves Like an Earthworm

A team of engineers at the University of Illinois at Urbana-Champaign built a new kind of crawler robot. The wheel-less design takes inspiration from two unconventional sources: origami and the earthworm. Assistant professors Aimy Wissa and Sameh Tawfick, along with a team of graduate and undergraduate students, used “Kresling” paper-folding principles to create buildingblock actuators (Figure 1).

Posted in: Articles, Materials, Motion Control, Motors & Drives, Automation, Robotics
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Selecting the Correct Actuator

The need for actuators has grown exponentially. Nearly everywhere you look you can see pneumatic, hydraulic, or electric actuator systems at work in an endless variety of applications. There are many stereotypes surrounding these three types of motion systems, and while some of the ideas may stand true, many of the thoughts we have associated with these components are outdated and need to be revisited. Whereas you may think that your application's need for actuation rests on one specific type of actuator, technological advances have allowed us to reexamine the specifics of each, which could mean more than one option for your project.

Posted in: Articles, Motion Control
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MOTOR DRIVES: Build or Buy

Every system design presents a unique set of specifications regarding cost, space, time-to-market, and other factors. Designers must therefore make tradeoffs to meet these requirements, such as opting for a higher priced component to meet a stringent space constraint. For a motion application, design engineers can either source motion control components as complete self-contained units or build their own in-house, and each option has its pros and cons.

Posted in: Articles, Motion Control
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Inch vs. Metric Ball Screws: Are You Asking the Right Questions?

Because ball screws are available in both inch and metric dimensions, designers sometimes begin the specification process by selecting a product family based on the unit of measure. This decision may prematurely exclude the ideal product for the application and lead to significant losses in time, labor, and expense. This article explains how sizing and selection questions centered on performance — instead of monikers — can lead to more efficient linear motion designs.

Posted in: Articles, Motion Control
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Reduce Compressed Air Costs with Proper Air Cylinder Sizing

There may be no stronger ally of electrical power utilities than industrial size air compressors, as they drone on every day, taking atmospheric air and transforming it into useful energy. Countless kilowatt hours are gobbled up in a mechanical conversion of electrical power into pneumatic power, a process that is wickedly inefficient, with one horsepower of pneumatic energy costing six times as much to generate when compared to one horsepower of electrical energy. Nevertheless, with its tremendous versatility, efficiency, and widespread use throughout many sectors, compressed air provides a clean, reliable source of pneumatic power that has a value outweighing its cost to produce.

Posted in: Articles, Motion Control, Sensors and actuators, Sensors and actuators, Electric power, Hydraulic and pneumatic hybrid power, Compressors, Pneumatic systems
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Energy Management Through Direct Drive Servo Technology

Direct drive servo motor and drive technology has many advantages. It reduces an axis’ parts count, mechanical losses, and often its objectionable noise. What’s more, it also increases the machine’s efficiency, lowering operation cost for the user due to its inertia ratio as compared to the more common mechanically advantaged multi-body axis designs. Reducing the mechanical transmission components (gearboxes, timing belts, pulleys, cams, lead screws, etc.) between the motor and its load is only part of the savings.

Posted in: Articles, Motion Control, Engine efficiency, Rotary engines
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Smart Actuators Add Brains to Automation Brawn

Actuators have always been on the frontline of automation, providing the “push and pull” that extends human capabilities to operate everything from delicate pick-and-place applications to 10-ton agricultural combines. Now, as the industrial world becomes increasingly digitized and connected, a new generation of actuators is fulfilling that role with more intelligence, simplicity, and economy, while overcoming increasingly challenging environmental conditions.

Posted in: Articles, Motion Control, Electronic equipment, Sensors and actuators, Switches, Electronic equipment, Sensors and actuators, Switches, Automation, Robotics
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Eliminate Interference from Converter Output

Electromagnetic compatibility (EMC) in frequency converters can be very problematic if not addressed properly in the initial design. EMC ensures the proper operation of devices to avoid negative electromagnetic interference (EMI) effects. Good design takes into account the control, design, and function of each device to prevent such interference.

Posted in: Articles, Motion Control, Electromagnetic compatibility, Electromagnetic compatibility, Chokes
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Sizing and Selecting Linear Motion Systems

Virtually all manufacturing processes incorporate some type of linear motion. A common mistake that designers make when sizing and selecting linear motion systems is to overlook critical application requirements in the final system. This can lead to redesigns, and may also result in an over-engineered system that is costlier and less effective than desired. “LOSTPED” is a simple acronym that guides the designer in gathering the information needed to specify the appropriate linear motion components or modules in any given application.

Posted in: Articles, Motion Control, Systems engineering, Manufacturing equipment and machinery, Manufacturing processes
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