Features

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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Product of the Month: August 2017

Harwin, Salem, NH, announced the SYCAMORE surface-mount socket that provides pin retention and durability for high-volume applications manufactured using automated systems. The capacitor's design features three points of contact, providing continuity and robustness. Key markets include gas detection systems, metering systems, and other applications that require modules and devices such as field-replaceable parts or temperature-sensitive components to be mounted to a printed circuit board. The single-part SMT socket design features a profile of 0.3 mm above the PCB. Available in top and bottom entry versions, it accepts 1.0 or 1.50 mm-diameter pins, and is open-ended for unlimited mating pin depth. It is manufactured from beryllium copper, and contacts are gold-plated to ensure high conductivity over a temperature range of -50 to +125 °C.

Posted in: Products, Manufacturing & Prototyping
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Reduce Compressed Air Costs with Proper Air Cylinder Sizing

Choosing an air cylinder without a full understanding of how it will perform in a pneumatic circuit can have long lasting, costly consequences.

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
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Energy Management Through Direct Drive Servo Technology

Inertia ratio provides a determinate measure for optimizing energy utilization of a servo motor during a machine’s design.

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
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Smart Actuators Add Brains to Automation Brawn

Integrated electronics let smart actuators perform enhanced control functions that were previously external, such as switching, position feedback, and system diagnostics.

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
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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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Micromachined Sensors Monitor Train Rails and Predict Failures

Sensors designed to predict helicopter transmission failures are now used to detect problems in train tracks.

Spinoff is NASA's annual publication featuring successfully commercialized NASA technology. This commercialization has contributed to the development of products and services in the fields of health and medicine, consumer goods, transportation, public safety, computer technology, and environmental resources.

Posted in: Articles, Sensors, Failure analysis, Sensors and actuators, Sensors and actuators, Railway vehicles and equipment
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Defense Advanced Research Projects Agency

The Defense Advanced Research Projects Agency (DARPA) was created with a national sense of urgency in February 1958 amidst one of the most dramatic moments in the history of the Cold War and the already-accelerating pace of technology. In the months preceding the official authorization for the agency's creation, the Soviet Union had launched an Intercontinental Ballistic Missile (ICBM), as well as the world's first satellite, Sputnik 1.

Posted in: Articles, Defense, Defense industry, Historical reference, Research and development
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Products of Tomorrow: August 2017

This column presents technologies that have applications in commercial areas, possibly creating the products of tomorrow. To learn more about each technology, see the contact information provided for that innovation.

Posted in: Articles, Batteries, Electronics, Coatings & Adhesives, Materials, Batteries, Batteries, Ceramics, Coatings Colorants and Finishes, Coatings, colorants, and finishes, Corrosion, Electrolytes, Insulation, Rescue and emergency vehicles and equipment
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Using Formal Methods for Engineering Embedded Systems

Between 1985 and 1987, a radiation therapy device called the Therac-25 was involved in at least six incidents in which the device delivered massive overdoses of radiation. The patients involved suffered radiation burns and symptoms of radiation poisoning. Three of those patients eventually died, all because of a latent software bug. A race condition had gone undetected. It was a test case no one had thought to define.

Posted in: Articles, Software, Embedded software, Embedded software, Medical equipment and supplies, Systems engineering, Quality assurance, Quality assurance
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