Motion Control

Brushless Vibration Motors

Nidoc Copal USA Corp. (Torrance, CA) offers the LVB10 line of brushless vibration motors measuring 10 mm outside diameter and 3.4 mm axial length. The LBV10-003 model reaches speeds of 13,500 rpm and draws a rated current of 76 milliamps, while the LBV10-008 model reaches 12,000 rpm at 62 milliamps. The developed vibration force is 1.8 grams on both models.

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Voice Coil Actuator

Gee Plus (Elgin, SC) has announced the VM2436 voice coil actuator that provides bi-directional linearity over a maximum linear stroke of 0.59". It develops a peak force of almost 11 ounces in a package size of 0.94" outside diameter by 1.49" long. The actuator is constructed using a Teflon-impregnated coating on the core of the magnet assembly, with the coil assembly running directly against the surface. The actuator is suited for individual equipment requiring a z-axis drive.

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Servo Motor

Nanomotion (Ronkonkoma, NY) offers the MM industrial servo motor that provides unlimited rotary or linear motion with 0.17 N of driving force and velocity to 235 mm/sec. The motor measures 9 × 17 × 5 mm and weighs 5 grams. It works with the company’s standard amplifiers and any servo control, and can be integrated into most bearing structures.

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Direct Drive Actuator

Copley Controls (Canton, MA) offers the ServoTube actuator with twin outrigger bearings designed for applications subject to high side loading. A ball-bushing option with steel bearing rails provides maximum side-loading support. Optional polymer bushings, which use aluminum rails, are suitable for vertical loads. The new bearing structure minimizes jamming and simplifies actuator integration into rugged industrial equipment.

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Motor Driver

Allegro MicroSystems (Worcester, MA) has announced the A1441 full-bridge motor driver designed to drive single-phase, low-voltage, bipolar brushless DC motors. Commutation of the motor is achieved by the use of one Hall element to detect the position of an alternating pole ring magnet. The IC semiconductor process enables the integration of Hall element on the same IC as the motor control circuitry.

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Vibration Analyzer

Datastick Systems (Campbell, CA) offers the VSA-1212 vibration spectrum analyzer, a PDA-based vibration analyzer that uses off-the-shelf ICP®-type piezoelectric accelerometers for machine condition monitoring and maintenance. The system includes the Datastick® analyzer module that attaches to PDAs running Palm OS, the Datastick Spectrum handheld software that collects and displays vibration measurements, and Datastick Reporting System™ software that receives the data from the handheld into a Microsoft® Excel® workbook on the PC.

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Brushless DC Motors

Pittman® Brushless DC servomotors from PennEngineering® Motion Technologies (Harleysville, PA) feature a slotless stator design for applications in data storage, medical, semiconductor, and automation. Features include low inductance and high current bandwidth for control during rapid acceleration in incremental motion applications, and a large magnetic air gap that minimizes viscous torque losses.

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