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Motor & Driver Package

The CRK series from Oriental Motor USA Corp (Torrance, CA) combines a five-phase stepping motor with a compact, low-vibration microstepping driver. In microstep operating mode, the driver provides 25 preset angle selections up to a capability of 250 microsteps per full step. The basic angle can be adjusted to match a two-phase stepping motor's step angle. The series is available in four frame sizes: 20 mm, 28 mm, 42 mm, and 60 mm. Motors are available with step motor holding torques ranging from 3.2 oz-in to 230 oz-in.

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Translation/Rotation Stage

PI L.P. (Auburn, MA) has released the M-110 series translation stages that provide linear motion of 5, 15, and 25 mm. Available are X, XY, and XYZ systems, which can be combined with the M-116 miniature rotary stage. The systems can be equipped with high-speed piezo drives. Features include 50-nm true minimum incremental motion, choice of lead screw drives and ball screw drives, and integrated Hall effect limit and reference switches. A choice of closed-loop DC motors and stepper motors is available. The encoder on the DC servo motor version features 0.007 micrometer resolutions per count. One- to four-axis systems are available.

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Ball Bearings

MRC Bearings Services (Kulpsville, PA) offers the R Series inch-sized stainless ball bearings for small shaft diameters. The single-row, deep-groove radial conrad-type bearings carry radial and thrust loads in either direction at high speeds. Bore sizes range from 1/8 to 1 ½", and open, shielded, and sealed bearings are available. Basic radial dynamic load ratings range from 70 lbf to 3,780 lbf and basic radial static load ratings range from 27 lbf to 2,650 lbf, depending on type. The bearings are supplied with pressed steel cages. Two-piece riveted machined phenolic or bronze cages are available.

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Motorized Stages

Prior Scientific (Rockland, MA) has added patent-pending Intelligent Scanning Technology (IST) to its Prior ProScan™ II H101A, H107, and H117, 4 × 3" scanning stages. IST allows each stage to be pre-programmed with a unique set of operating characteristics to that particular stage. The technology also allows the controller to periodically interrogate the stage and make adjustments to maintain orthogonality and metric accuracy.

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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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