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Motion Innovations
Circle 630. Rotary kit encoder. Ideally suited for use with 2.0 in. servo and stepper motors, the KX21 Series modular kit encoder uses a simple set screw mounting for concurrent air gap and electronics alignment. It provides a 0.030-in. air gap, minimizing problems with shaft end-play and more expensive shaft assemblies. Available in 1.5-in and 2.1-in. diameters, it has a maximum operating frequency of 100KHz and a temperature range of -10° to +70°C. BEI Sensors & Systems Co, Kimco Magnetics Div, 804-A Rancheros Dr, San Marcos, CA 92069. 800-572-7560. http://www.beikimco.com Circle 464. Speed reducer. The SHF-14-2UH line of miniature zero backlash harmonic drive reducers features a large through-hole design that enables shafts and wire bundles to pass directly through the center of the gearing. Output torques of 69 in-lbs., and momentary peak torques of 478 in-lbs. can be achieved. Gear reduction ratios of 50:1 through 100:1 are available in a single stage. HD Systems, 89 Cabot Ct, Hauppauge, NY 11788. 800-231-HDSI. http://www.HDSystemsInc.com Circle 631.
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Dolphin guides. In order to dampen vibration, these guides
contain no rolling elements or moving internal components. All metal-to-metal contact is
eliminated through the use of FrelonGOLD bearing material. The Dolphin rail is a
one-piece, ceramic-coated aluminum extrusion that features a Rockwell 70 hardness, and is
suited to mate with FrelonGOLD. They can be fitted with a ball screw, belt drive, lead
screw, or cylinder. Pacific Bearing, PO Box 6980, Rockford, IL 61125.
800-962-8979. 
Double rail system. This linear motion system is designed for
low-cost and low-profile uses. Typical applications include their use in automatic
assembly machines, X-Y tables, photographic enlargers, and duplicators, plus multiple
torch welding and flame cutting machines. The system consists of a selection of four sizes
of double rails in six lengths ranging from 13.5- to 122.5-in. The rail heights range from
0.600- to 1.407-in. SDP/SI, PO Box 5416, New Hyde Park, NY 11042.
516-328-3300. 
Servo amplifiers. The Power Master line has compact design,
reliable surface-mount technology and low internal power dissipation. They provide high
switching frequency and are available in a broad range. Brushed servo amplifier models
range up to 25 peak amps, with 2.37 kW of power. Brushless servo amplifier models range up
to 30 peak amps, with 6.0 kW of power. All Power Master amplifiers are available in less
than two weeks. CMC, 829A Middlesex Tpk, Billerica, MA 01821. 800-669-5112. 
Motor and driver packages. The UMK series of 2-phase motor and
driver packages produces microstep-type performance with a full-step/half-step driver.
This eliminates the need for a high-speed pulse generator, since step pulse counts at very
high frequencies are not required. This method allows the UMK to produce both low
vibration and lower audible noise. The driver runs on a 115 VAC, 60 Hz input. Oriental
Motor, 2510 W 237th St, Ste 102, Torrance, CA 90505.