Motion Control

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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Axial Piston Pump

Oilgear (Milwaukee, WI) introduced a contaminant-resistant PVWH open loop, axial piston pump. Ten sizes are available, and reach a pressure of 5,000 psi. With sleeve bearings that run on wet film and are pressure lubricated for stability, reliability, and repeatability, the unit is able to operate in special fluids. Features include: valve plate ported rear or top and bottom, SAE heavy duty shaft, high strength thru-shaft availability, up to 3,000 rpm, maximum pressure of 5,800 psi, and theoretical maximum displacements ranging from 0.66 in3/rev (10,8 ml/rev) to 7.94 in3/rev (130,2 ml/rev).

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Servo Amplifier

Copley Controls (Canton, MA) introduced the Model 800-1514 dual-axis servo amplifier for current (torque) control of brushless servomotors. The unit accepts encoder and Hall feedback data from a range of servo motor types. Drive torque is controlled by a ±10 V command from a motion controller or PLC, and uses CME 2 Windows software. The unit operates on a 20 V to 55 V isolated DC supply and delivers two independently controlled outputs (4 A peak, 3 A continuous), and communicates with the set-up computer via a RS232 link. Industry standard buffered encoder output, ±10 V torque command, and all control signals are optically isolated. The device provides 5 VDC output for encoder and Hall sensor operation, as well as dual-channel status indicators, protection circuits for voltage, load, temperature, and l2t current limiting. Dimensions are 6.58 × 3.9 × 1.17".

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Axis Motion Software

National Instruments (Austin, TX) released NI Motion Assistant 2.0 interactive software for prototyping single- and multi-axis motion control systems. Motion profiles from CAD and drafting programs can be imported using a DXF file format, and the software facilitates the implementation of profiles in NI CompactRIO programmable automation controllers or generation of code for PCI/PXI plug-in motion controllers. After saving a motion profile as a DXF file in a CAD or drafting program, the software can be used to import the profile and save motion-specific commands in an XML file format without writing additional code. Also featured is smart contouring and a graphical, point-and-click interface with 3D visualization capabilities for creating motion control applications using stepper, servo, and piezo actuators.

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DC Gear Motors

Nidec Copal USA Corp (Torrance, CA) offers the MG16 series of sub-miniature brush DC motors with high torque planetary boxes. The 8-model series is RoHS compliant and measures 16 mm. Available gear ratios include 60:1, 120:1, 240:1, and 500:1 with two excitation voltage levels of 6 VDC and 12 VDC. Performance ranges from 4.86 oz-in rated torque at 164 rpm and 22.6 oz-in starting torque for the 6-volt model with a 60:1 ratio, to 28 oz-in rated torque at 21 rpm and 146 oz-in started torque for the 12-volt model with a 500:1 ratio. Maximum gear motor weight for the 500:1 gear ratio is 1.24 oz. All models can operate from 0°C to 50°C ambient temperature range. Options include an encoder.

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