Motion Control

Frameless Motors

Applimotion (Loomis, CA) has released ULT direct drive frameless motors in sizes up to 355-mm diameter, with 200-mm through holes, covering , and lasers.

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Miniature Digital Servo Drive

Elmo Motion control (Westford, MA) offers the “Whistle” digital servo drive with up to 500 watts of continuous power at 99% efficiency. The device weighs 1.76 ounces and measures 2 × 1.8 × 0.6". It interfaces to brush DC, brushless PM, and linear and/or voice coil motors. Power is provided by an external 7.5 to 95 VDC isolated DC power supply. A supply control algorithm enables the device to operate with one power supply.

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Motion Controller

The RMC75E one- and two-axis motion controllers from Delta Computer Systems (Vancouver, WA) support Ethernet communications that can be used to download parameters and variables to modify motion control programs from a master controller such as a PLC or industrial PC. The interface features speeds of 10/100 Mbps with full- or half-duplex operation analog with auto-negotiation and auto-MDix crossover detection.

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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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