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Hybrid Stepper Motors

AMETEK Technical and Industrial Products (Kent, OH) has unveiled its MAE brand hybrid stepper motors in three series for high performance positioning applications. The HY Series steppers, in sizes 16, 17, 23, and 42, exhibit low rotor inertia to maximize possible acceleration.

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Ceramic Linear Motor Actuator

The N-310 NEXACT ceramic linear motor actuator from Physik Instrumente L.P. exhibits a 10 Newton push-pull force with 20 mm travel and a maximum speed of 10 mm/sec. It provides picometer resolution, millisecond response time, and high bandwidth. The actuator measures 25 × 25 × 12 mm and weighs 50 g (1.7 oz.).

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Vibration Motor Driver IC

The Melexis MLX90283 vibration motor driver IC from Melexis Microelectronic Integrated Systems (Concord, NH) is designed to overcome the problem of single-phase brushless dc motors starting in the incorrect position, which could lead to unreliable start-up or a locked rotor condition and prevent functioning of a vibrating alert in a mobile phone or PDA.

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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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