Motion Innovations

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Gear reducers.The MultiTech line of servo duty gear reducers accommodate stepper and brushless DC motors in precision applications. Developed on the base of existing gearheads, the new reducers can be used with NEMA 23 and 34 mounts. There are eight ratios in each frame size, ranging from 3:1 to 100:1, with torque ratings from 45 to 399 in-lbs. Backlash specifications are less than one degree. Applications include speed conveyors, medical pumps and plasma cutters. Bison Gear and Engineering,St. Charles, IL. http://www.bisongear.com

Free Info - Circle 540

Timing/drive motors. POLYVOLT permanent magnet subfractional hp motors are available in AC (synchronous/reversible), DC and stepping configurations. Many options are offered for custom configurations, and include different gearbox styles, voltage ratings, torque values, shaft styles, output speeds and more. The company also produces POLYCLUTCH precision miniature clutches and brakes. Custom Products Corp, N Haven, CT.

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Unimotor gearmotors.This company's gearmotors use low backlash planetary gearboxes designed to satisfy demands for higher torque levels without sacrificing positioning accuracy. They provide a cost effective method of extending motor rated torque within a range of applications such as robotics, machine tools, packaging machines, printing presses and other highly dynamic positioning and automated operations. The simple, compact design makes them particularly suitable for drive systems with high standards of precision and reliability. Their low, consistent backlash and high torsional rigidity provide excellent positioning accuracy. Minimal energy loss in dynamic applications is obtained from the gearmotors' high efficiency and low moment of inertia. Control Techniques Dynamics, United Kingdom

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Absolute encoders.The VA (virtual absolute) series of encoders combine the opto-mechanical simplicity of an incremental encoder, with the system reliability and interfacing ease of an absolute encoder. The technology has inherent error detection circuitry not found in conventional absolutes, and a requirement for only a small fixed initialization distance, regardless of starting position or direction of travel. One unit is an enclosed linear recorder with 20-bit resolution. Gurley Precision Instruments, Troy, NY. http://www.gurley.com

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Feedback monitoring system. Incorporating a digital signal processor, the IntelliTach is a feedback monitoring device designed to eliminate downtime resulting from loss of encoder signals. It accepts inputs from any line driver encoder or digital tachometer, and simultaneously monitors two encoder units, switching from one input to the other in the event of a velocity feedback failure. NorthStar Technologies, Westerville, OH. http://www.northstar-tec.com

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Single-component machined assemblies.Wrap spring assemblies machined as a single integrated part can suit applications ranging from deep space instrumentation to more earthly medical instrumentation. In one example, a pneumatic cylinder was to rotate a six-position carousel. The spring, which is supported on a ball bearing, was combined with a lever arm, a bearing mount with a retaining ring groove, and positional stops. Helical Products Company, Santa Maria, CA. http://www.Heli-Cal.com

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26mm DC motors.LO-COG Series 8920 brush-commutated DC motors and gearmotors offer a cartridge brush assembly that reduces audible and electrical noise and improves brush life by maintaining optimum brush force throughout the life of the motor. An economical alternative to coreless products, applications include medical and automation equipment. Available in lengths of 1.798-, 1.923-, and 2.173-in., they provide continuous torque output up to 3.17 oz-in and peak torque up to 20 oz-in with speeds over 8900 rpm. Pittman, Harleysville, PA. http://www.pittmannet.com

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