Features

Molded Glass Lenses

Moulded Optics GmbH (Schoffengrund, Germany) offers single-sided rod and blank-molded aspheric lenses made of crown, borosilicate, and high-refractive glass materials in diameter sizes from 2 mm to 100 mm. The aspheric first surface is molded and the spherical second surface is either ground and polished or molded. The lenses are suitable for laser diode collimating and focusing, digital projection, and microscopic measurement. Also available are molded half-ball lenses made from B270, borosilicate, and F2 class materials, available in diameter sizes of 3, 4, 5, and 6 mm, with standard, truncated, and extended center thickness. The hemisphere first surface is molded and the plano second surface is ground and polished. Applications include LED lighting, fiber communications, endoscopy, microscopy, optical pickup devices, and laser measurement systems.

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Hundreds of Gearmotors Drive Times Square Scrolling Sign

With a zoning ordinance requiring businesses to throw up big, bright, eye-catching signs, Times Square in New York City has an illuminated-sign density rivaling Las Vegas. When Toys “R” Us moved into the neighborhood, it contacted Revolution Display Systems, (Toronto, Canada) to create a motor-controlled, synchronous, contiguous moving image that would constitute the location’s storefront. The resulting 165-module “Building Board” is the first large-format scroller matrix in the world.

Posted in: Applications, Motion Control, Application Briefs

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Drive Retrofit Update Enables Smoke-Removal System at Atlanta Airport

When the City of Atlanta finalized plans for the capital-improvement project at Hartsfield-Jackson Atlanta International Airport, an integral part of the 10-year, $5.4 billion project included upgrading the ventilation system of the underground Automated People Mover (APM). The APM’s previous ventilation system was adequate when the APM served the A, B, C, and D Concourses. When Concourse E was added and the APM extended — now 3.5 miles long, handling 128,000 passengers an hour — the fans required upgrading to handle additional flow and pressure to meet National Fire Protection Association standards for emergency smoke evacuation. The $3.4-million set up and installation contract for mechanical and electrical equipment was awarded to W.B. Wallis & Co. (Atlanta, GA).

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Device Simulates Spine Motions

The spine is the most complex mechanical system in the human body. With the University of Minnesota in Minneapolis, Instron (Norwood, MA) is utilizing the BioPuls™ Multi-Axial Spine Testing System to characterize the multi-axial dynamism of the backbone. Such testing will help further the understanding of spine kinetics, simulating precisely the complex, coupled motions typical of the spine and impact on spinal procedures. The system can be used to help evaluate the design of new instruments and implants that allow a greater physiological range of motion.

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Toroidal Roller Bearings

Serving as non-locating bearings in large electric motors, SKF USA’s (Kulpsville, PA) CARB® toroidal roller bearings accommodate heavy radial loads and compensate for misalignment. Suitable for both coupled and belted loads, the bearings offer users a single bearing solution for motors, regardless of mounting method. The self-aligning bearings adjust for axial expansion of the shaft internally while self-guiding rollers maximize load capacity. The bearings reduce skidding on raceways, enabling their use on coupled motors with relatively light loads. A range of sizes is available with seals and optional cages. Custom designs are also available.

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Hydraulic Power Unit

SPX Fluid Power (Rockford, IL) has released the SPX Smiths Model SMR low-pressure DC bi-rotational hydraulic power unit, available in both holding and non-holding designs. The power unit comes with a standard emergency override shaft, pressure setting options, four tank sizes, and SAE and BSPP port options. A handset controller and reversible start solenoid are optional.

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Linear Actuator

The DGEA cantilever electric linear actuator from Festo Corp. (Hauppauge, NY) is designed so the slide unit remains stationary while the profile moves axially. Suited for space-contained, multi-axis configurations, the motor and cables remain fixed, minimizing the moving mass to just the load and aluminum profile. The toothed belt-driven actuator with an internal recirculating ball bearing guide comes in two mounting configurations: the basic, in-line coupling model, or with an integrated right-angle gearbox. The unit allows direct mounting of end effectors such as grippers, rotary drives, and vacuum components, and increases system dynamics by reducing the effective moving load. As the motor cables remain stationary, cable fatigue is eliminated. Features include speed to 3m/sec, stroke lengths to 1,000 mm, and 18-, 25-, and 40-mm sizes.

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