Motion Control

Rodless Cylinders

The HORV Series of rodless cylinders from Humphrey Products (Kalamazoo, MI) have a flat piston that creates a profile that is 40% thinner than conventional rodless cylinders of equal bore and stroke. The block-type end cap eliminates the need for mounting brackets. The body places no loads on either the actuator axis or the stand. A sensor switch track uses a cap groove that allows the lead wires for embedded sensor switches to be drawn out from a single surface. The HORV Series features a high-strength stainless steel band instead of a plastic band, and is available with NPT ports and mounting options that include a shock absorber unit and F-tube supports.

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Motion Controller/Driver

A CAN bus interface has been added to the SilverDust™ IGB servo motion controller/ driver by QuickSilver Controls (San Dimas, CA) for servo control of NEMA 17 and 23 frame step motors. The CAN interface is fully isolated and supports up to 64 devices on the 1-MB bus. The new bus enables one servo to modify the motion of another servo using its I/O. The CAN bus may be used to interface to other CAN products or as a local bus for peer-to-peer data sharing for encoder position, velocity, torque, and I/O. The motion controller’s serial port remains available to interface to a host such as a PLC, HMI, or PC.

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Induction Motor Reverser

Teledyne Relays (Hawthorne, CA) has introduced the Series EMCRT solid-state, three-phase induction motor reverser that can be used to turn on an industrial motor in either direction. The maximum current is 50 Amps. The EMCRT48D50 model operates at 400 Vac, 4 kW, while the EMCRT48D75 operates at 400 Vac, 7.5 kW. Each unit measures 3.94 × 2.99 × 2.22", and weighs 4.58 ounces.

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Linear Actuators

The Bug series of linear actuators from Ultra Motion (Mattituck, NY) includes ABEC-7 angular contact bearings and interchangeable motor mounting plates. A Kevlar drive belt and pulleys provide 1:1, 2:1, 3:1, 4:1, and 5:1 drive ratios with low backlash and low audible noise by eliminating gears between the motor and the drive screw. There are 17 motor options including DC, DC servo, DC gearmotors, steppers, and Animatic Smart Motors. Absolute position feedback is available so that position is remembered if power is lost.

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Rotary Encoders

RESM rotary/angle encoders from Renishaw (Hoffman Estates, IL) combine stainless steel mounting ring/scale and dirt-filtering options with signal processing and IN-TRAC™ auto-phase bidirectional optical reference mark. The device offers speeds to 3,600 rev/min and accuracy to ±0.5 arc seconds, with resolution and repeatability to 0.02 arc seconds. The encoders are available in a range of shaft diameter sizes from 52 to 413 mm.

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Rodless Actuator

Tol-O-Matic (Hamel, MN) has introduced the B3W series electric belt drive actuator that can be used as a direct drop-in replacement for the company’s B3B actuator. The series features a sealed bearing system at both drive and idle pulleys, stainless steel dust band for internal parts protection, and a urethane steel belt. The B3W series can be used as an alternative to auxiliary rail systems.

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Stock Springs

Lee Spring (Brooklyn, NY) offers Type 316 stainless steel stock compression springs in wire sizes from 0.006" through 0.072". The compression springs feature squared and ground ends, and are ultrasonically cleaned. The springs are suitable for applications in medical products and processes, pharmaceuticals, food processing and handling, aerospace products, semi-conductors, consumer products, and heat exchangers. They can be manufactured in alloys including 17-7, beryllium copper, phosphor bronze, and Inconel.

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