Motion Control

New Products: August 2017 Motion Design

Brushless AC Servo Motors

Allied Motion Technologies (Amherst, NY) introduced the HeiMotion™ Premium (HMP) brushless AC servo motor family. The motors, which have a 20,000+ hour life span, are available in five metric frame sizes with rated torque from 0.12 up to 14.4 Nm, and continuous shaft power from 50 W to 3.75 kW. Standard flange sizes include 40, 60, 80, 100, and 130 mm. Top speed ranges from 2,000 to 9,000 RPM; holding torque goes from 0.18 to 18.5 Nm; and winding voltage choices extend from 48 V up to 560 V. Optional features include standard resolver or encoder (including single cable HIPERFACE® DSL interface), holding brake, and connector choices.

Posted in: Products, Motion Control
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Straws Help Create Simple Robot Joints

Plastic drinking straws and inflatable tubing are used to build machines that walk like insects.

Inspired by arthropod insects and spiders, Harvard professor George Whitesides and Alex Nemiroski, a former postdoctoral fellow in Whitesides’ Harvard lab, used ordinary plastic drinking straws to create a type of semi-soft robot capable of standing and walking. The team also created a robotic water strider capable of pushing itself along the liquid surface.

Posted in: Briefs, Motion Control, Automation, Design processes, Robotics, Materials properties, Plastics
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Eliminate Interference from Converter Output

Motor chokes, sine wave filters, and EMC sine wave filters can help suppress the electromagnetic interference at a frequency converter’s 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
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Electromagnetic Actuator Decouples Linear and Rotary Motions

A lightweight module for rapid, accurate, and versatile positioning of semiconductor chips features a novel electromechanical actuator that can move objects both linearly and rotationally. The technology was developed by researchers at the A*STAR Singapore Institute of Manufacturing Technology (A*STAR SIMTech) and National University of Singapore (SIMTech-NUS) Joint Lab.

Posted in: News, Industrial Controls & Automation, Manufacturing & Prototyping, Mechanical Components, Motion Control, Positioning Equipment
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Soft “Vinebot” Excels at Search and Rescue

Inspired by natural organisms like vines that cover distance by growing, researchers at Stanford University have created a soft, tubular robot that lengthens to explore hard-to-reach areas. The vine-like robot can grow across long distances without moving its whole body, which could prove useful in search-and-rescue operations and medical applications.

Posted in: News, Motion Control, Robotics
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Motor Control Technology Boosts Performance of Remotely Piloted Aircraft

PC Krause and Associates
West Lafayette, IN
For more info click here

With support from the Air Force Small Business Innovation Research/Small Business Technology Transfer (SBIR/STTR) Program, PC Krause and Associates (PCKA) has developed a system that could meet a wide range of small aircraft electrical power and propulsion system needs. The company was aiming for its new modular motor drive system to fill the gap between existing commercial equipment and custom solutions at a cost that is viable for most remotely piloted aircraft (RPA) platforms.

Posted in: Application Briefs, Motion Control, Motors & Drives, Architecture, Computer software / hardware, Computer software and hardware, Fly-by-wire control systems, Architecture, Computer software / hardware, Computer software and hardware, Fly-by-wire control systems, Electric motors, Military aircraft, Unmanned aerial vehicles
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3D Printed Tensegrity Object Can Change Shape

A team of researchers from the Georgia Institute of Technology has developed a way to use 3D printers to create objects capable of shape change. The objects use tensegrity, a structural system of floating rods in compression and cables in continuous tension. The researchers fabricated the struts from shape memory polymers that unfold when heated. The technology could someday be used in applications ranging from space missions to biomedical devices.

Posted in: News, Manufacturing & Prototyping, Mechanical Components, Motion Control
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Self-Learning Robot Hands Adapt to Grasp Objects

A new grasp system with robotic hands works without previously knowing the characteristics of objects. The system, which learns by trial and error, was developed by researchers at Bielefeld University in Bielefeld, Germany. It features two hands that are based on human hands in terms of both shape and mobility. The robot brain for the hands must learn how everyday objects like pieces of fruit or tools can be distinguished based on their color or shape, as well as what matters when attempting to grasp the object; for example, a banana can be held, and a button can be pressed. The system learns to recognize such possibilities as characteristics, and constructs a model for interacting with and re-identifying the object.

Posted in: News, Motion Control, Positioning Equipment, Automation, Robotics
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Crawling Robot is Powered by Moisture

Using an off-the-shelf camera flash, researchers at Jilin University, China, turned an ordinary sheet of graphene oxide into a material that bends when exposed to moisture. They then used this material to make a spider-like crawler and claw robot that move in response to changing humidity, without the need for any external power.

Posted in: News, Materials, Motion Control, Robotics
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Advanced Tool Drive System (ATDS) Camera Positioning Mechanism (CPM)

Robotic servicing of a satellite in low earth orbit (LEO) or geosynchronous Earth orbit (GEO) requires advanced systems capable of meeting the harsh environments of space. To support this effort, the Goddard Space Flight Center Satellite Servicing Capabilities Office (SSCO) has developed a camera positioning mechanism that will be capable of viewing features on a client satellite. Application of the CPM technology would be in multiple areas of spaceflight requiring robotic servicing including space exploration, planetary science, Earth science, and manned spaceflight.

Posted in: Briefs, Mechanical Components, Motion Control, Motors & Drives, Positioning Equipment, Optics, Optics, Maintenance, Repair and Service Operations, Maintenance, repair, and service operations, Robotics, Satellites
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