Special Coverage

Technique Provides Security for Multi-Robot Systems
Bringing New Vision to Laser Material Processing Systems
NASA Tests Lasers’ Ability to Transmit Data from Space
Converting from Hydraulic Cylinders to Electric Actuators
Automating Optimization and Design Tasks Across Disciplines
Vibration Tables Shake Up Aerospace and Car Testing
Supercomputer Cooling System Uses Refrigerant to Replace Water
Computer Chips Calculate and Store in an Integrated Unit
Electron-to-Photon Communication for Quantum Computing

Managing Misalignment in Linear Motion Systems

When design engineers evaluate linear bearings, they always ask about performance attributes such as speed, load capacity and lifecycle. Then they want to know the price. It’s rare, however, that they ask about the bearing’s sensitivity to misalignment. And that’s a big mistake, because misalignment represents one of the leading causes of premature linear bearing wear and failure.

Posted in: On-Demand Webinars, Motion Control
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How to Select a DC Motor: Coreless and Iron Core Brushed DC Motors

DC motors possess linear relationships that allow for very predictable operation. Motion control manufacturers and designers depend greatly on the premise that these linear relationships will hold true, since the laws of physics do not change. However, despite their simplicity, selecting a DC motor for an application can still be a daunting task. There are many other variables to take into account including dimensions, load, duty cycle, etc. This white paper provides an overview on Coreless / Brushed DC motors, and what to consider before committing.

Posted in: White Papers, Motion Control, Motors & Drives, Automation
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Multiturn Kit Encoders Without Batteries or Gears: A Cost-Efficient Approach for Rotary Position Measurement in Servomotors and Rotating Equipment

POSITAL is introducing a new set of component-level products that are designed to be built into servomotors or other types of equipment when real-time measurement of rotary position (angular displacement) or rotational speed is required. Based on POSITAL’s well-proven magnetic rotary encoder technology, these new products provide manufacturers with a flexible and cost-effective way of incorporating rugged and precise rotation measurement capabilities directly into their devices.

Posted in: White Papers, Mechanical Components, Mechanics, Motion Control
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Cooling Solution Helps NASA Get Closer to Mars

Cold conditioning systemAggrekoHouston, TX281-985-8200www.aggreko.com
Posted in: Application Briefs, Motion Control, Research and development, Cooling, Spacecraft
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Scanning Performance of Air Bearing Equipped Precision Motion Systems

Scanning is a common technique in applications ranging from high-resolution microscopy to industrial material processing. Scanning involves moving either a workpiece or an optic at a constant velocity while a reading or writing operation takes place. Air bearings are used for both purposes, especially when high precision and reliability are vital. While the physical act of writing an image or capturing an image differ by application and industry, all such applications share a common requirement — maintaining a constant velocity.

Posted in: Articles, Motion Control, Imaging and visualization, Automation, Bearings, Reliability
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Four Ways to improve Production by Understanding the Physics of Servos

There is always a need to increase production in automation applications. Sometimes achieving improvements requires breaking the process down to its fundamental basics. The science behind the technology of servo-based motion control systems should be considered when attempting to eliminate inefficiencies. Four fundamentals to examine are inertia, resonance, vibration suppression, and regeneration.

Posted in: Articles, Motion Control, Finite element analysis, Electronic control systems, Automation, Productivity
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Converting from Hydraulic Cylinders to Electric Actuators

Hydraulics are rugged and deliver a low cost per unit of force, but electric rod actuators have attained higher force capacities while becoming more flexible, precise, and reliable.

Advances in motion control technology have prompted a new debate — do hydraulic cylinders or electric linear actuators offer the best solution for a linear motion application? Hydraulic cylinders provide high force at an affordable cost. Hydraulics are rugged, relatively simple to deploy, and deliver a low cost per unit of force. However, electric rod actuators (electric cylinders), particularly those with roller screws, have attained increasingly higher force capacities while becoming more flexible, precise, and reliable.

Posted in: Articles, Motion Control, Electrical systems, Flight control actuators, Hydraulic control, Reliability
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Custom Brakes Meet the Challenges of Gearless Motor Elevators

Standard braking systems could not meet the difficult speed, energy, and dynamic torque constraints.

A manufacturer of low and high-rise elevators faced a challenge when customers began calling for a flexible elevator to meet the needs of the growing mid-rise, mixed-use building market. The global construction boom of mid-rise buildings can be attributed to several factors. Developers are more apt to build “short” because it requires less capital and the time to get permits approved is reduced considerably, especially in developing countries.

Posted in: Application Briefs, Motion Control, Braking systems, Needs assessment, Product development
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New Products: April 2017 Motion Design

Variable Frequency Drives

Through a new partnership, variable frequency drives (VFDs) from American Control Electronics (South Beloit, IL) will now be offered as a product add-on to Brother Gearmotors’ portfolio of sub-fractional AC gearmotors and reducers. OEMs have access to an optimized VFD for the Brother sub-fractional power range instead of purchasing an offthe- shelf VFD that may not be the best fit for the application. For example, a user buying a sub-fractional HP (1/100th to 1/6th HP) gear motor will not have to choose an off-the-shelf VFD rated for 1/4 HP. ACE’s microprocessor-based VFDs control AC motor speed and torque by varying input frequency and voltage.

Posted in: Products, Motion Control
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Origami-Inspired Robot Can Ride with a Rover

The Pop-Up Flat Folding Explorer Robot (PUFFER) that’s in development at NASA’s Jet Propulsion Laboratory in Pasadena, CA, was inspired by origami. It travels with a rover, and its lightweight design can flatten itself, tucking in its wheels and crawling into places rovers can’t fit.

Posted in: News, Motion Control, Robotics
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