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Rotary Motion Simulators

The ARMS series direct-drive rotary motion simulators from Aerotech (Pittsburgh) can provide resolutions as fine as 0.02 arcsecond, with accuracy to +/-2.5 arcsecond and repeatability to +/-0.5 arcsecond. The motor and high-performance rotary encoder and directly coupled to a common shaft. The ARMS provides rate resolution down to 0.0002 deg/s and rate stability to 0.0001%.

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Spring Brake

The BFK458-L stopping and holding brake from Lenze-AC Tech (Uxbrdige, MA) is guaranteed to run for 10,000,000 cycles or two years of service life. The spring-applied brake has a cast iron casing and carries a two-year warranty.

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Hybrid Linear Actuators

Haydon Switch & Instrument Inc.’s 35000 series double stack hybrid linear actuators measure 1.4 square in. and are available in captive, non-captive, and external linear versions. The size 14 actuators are available in various resolutions ranging from 0.0158 to 0.127 mm per step and deliver thrust voluntarily limited to 222 N to avoid compromising long life. The actuators can be microstepped for even finer resolution.

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Piezoelectric amplifier

DSM (Franklin, TN) has introduced the VF-90 linear photoelectric amplifier for space-constrained and OEM applications. Compatible with National Instrument’s CompactRIO and CompactDAQ modular chassis, the amplifier is suited for both open-and closed-loop motion control applications.

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Variable Speed Motor

The DynaMotor from DynaMotors Inc. (Cleveland, OH) is designed to produce more torque than motors of comparable size. For instance, a NEMA 56 frame TEFC DynaMotor generates 11 foot-lb. of torque at 600 rpm — three times that of a comparably sized PWM inverter and AC motor, according to the company.

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Servomotor Couplings

The ServoClass coupling line from Zero-Max (Plymouth, MA) has been expanded with three new sizes to handle bore diameters from 0.875 to 1.378" and operating torque from 3.937 to 9,843 in. lb. The lightweight couplings incorporate Type 304 stainless steel disc packs and 7075-T6 aluminum hubs and center members. All have clamp-style hubs with corrosion-resistant socket head cap screws.

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Cylinder Position Sensor

The BIM-UNT universal magnetic field sensor from Turck (Minneapolis) uses magneto-resistive, board level technology that improves performance. In addition, the sensing face has been placed in front of the sensor to help short stroke cylinders.

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