Motion Control

Angle Encoders

Heidenhain (Schaumburg, IL) expanded its ERA 4000 series of angle encoders with the ERA 4×80, 4×81, and 4×82 versions. The ERA 4x80 is mounted using a centering collar method, with a low profile encoder system. With seven standardized diameters, system accuracies are offered with the 20 μm grating period version from ±6.1 arc seconds with the smallest diameter to ±2.8 arc seconds on the largest.

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Linear-Arc Motor

Applimotion (Loomis, CA) offers the LARC Series of linear-arc motors, a combination of a disk drive voice coil motor and brushless linear motor. The units can be driven by three-phase brushless motor controllers from 24 to 300 volts with speeds ranging from 0.1 to 1000 rpm. Features include axial low profile, with options as low as 10 mm axial thickness up to 800 mm diameter. Torque output is approximately 15 lb-in per radial inch of arc. With a 360° magnet track, they can run continuously. Hall Devices are a standard option.

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Angle Torque Motors

H2W Technologies, Inc. (Valencia, CA) released limited angle torque motors (“torquers”) that are single phase, brushless, low profile motors, vacuum compatible to 10^5 torr. Options include kit motors and housed motors. A linear servo amplifier and plug-and-play systems are available. Standard/custom designs include miniature 1.4 Ncm continuous, torque 5.2 Ncm peak torque (2 oz-in, 6 oz-in motors) and 706 Ncm continuous torque 2,118 5.2 Ncm peak (1,000 oz-in continuous torque, 3,000 oz-in peak) motors. Two series are available; the MR series feature a toroidally wound iron core stator with 2, 4, or 6 pole permanent magnet rotors, and provides angular excursions to 180°. The series is available in standard and low profile versions.

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Magnetic Ring Encoder

Madison Electric Products (Mentor, OH) has released the Model HPRT C-Face Magnetic Ring Encoder, compatible with AC vector drive applications. Standard features include digital square wave quadrature-signal (064, 128, 256, 512, 1024, or 2048 cycles per revolution), stainless steel components, detachable screw terminal block, and differential line driver output. A feeler gage to set the air gap (0.020 to 0.040") is provided. Both sides of the rings are C-face mounts. Input voltage is 5 VDC or 7 to 24 VDC, operating temperature is -40°C to +125°C. Options include a synchronized on-board index pulse, cable with gland nut, and 7- and 10-Pin MS or 10-Pin heavy-duty industrial connectors. The unit is short circuit protected.

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Couplings

Helical Products Co. (Santa Maria, CA) introduced single-piece, flexible couplings to compensate for mechanical movement irregularities. The units require neither maintenance nor lubrication; they offer constant rotational velocity, smooth bearing loads, and feature no backlash. Outside diameters (OD) range from 3/8 to 3". Metric OD of 15, 20, 25, 30, 40, and 50 mm are available. Imperial and metric bore sizes may be combined. The units are available in aluminum or stainless steel.

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Plug-In Relays

The plug-in General Purpose Relays from c3controls (Beaver, PA) are designed for use in motors and motion control devices. Base configurations come in Octal, Square, Flange Mounted, and Miniature Square, with pin and blade terminals (5A to 25A) from 1-pole up to 4-poles. Sockets are keyed for proper assembly. UL approved, the devices meet UL and CSA standards and requirements. The Octal Base and Miniature Square Base come in hermetically sealed models for use in Class 1, Division 2 Group A, B, C, and D hazardous locations. The 2-, 3-, and 4-poles units are available with ratings of 5A, 10A, and 12A. The devices are CE marked for global acceptance.

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Frequency Inverters

NORD Gear Corp (Waunakee, WI) offers the NORDAC SK 500E and 520E AC vector frequency inverters. Both feature high torque, rapid response, and wide spread range for extended power outputs ranging from 0.25 kW to 7.5 kW. Available in sizes between 7.32 × 2.99 × 5.94" and 11.26 × 3.86 × 7.01", and features selectable modes for sensorless vector modes for closed-loop flux vector control, optional position control, and additional I/O. Other features include local operation through inverter controls, integrated dynamic braking chopper, automatic motor parameter identification, integrated Class A filter, side-by-side mounting, field bus compatibility, and high overload capability (150% – 60 sec., 200% – 5 sec.).

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