Motion Control

Motion Control Systems

Aspen Motion Technologies, a Division of Pentair (Radford, VA), offers motion control solutions. Capabilities range from 0.5" in diameter to 36" in diameter for permanent magnet brushless synchronous motors/generators, with the associated drive electronics, from a few Watts to 25 kilowatts, often with a DSP/ARM core and data interface such as analog, CAN OPEN, Zigbee, RS485, I2C, or other industrial communication interfaces. Systems include precision servomotors with feedback devices, brakes, gearboxes, and integrated intelligent controllers. Other products include forward curve/backward curve/centrifugal blowers, high-efficiency systems (motors and generators), high-performance magnetic couplings, compact liquid pumps, direct drive solutions with integrated drives, and complete OEM products per customer specifications.

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Flow-Regulating Valve

The Lee Company (Westbrook, CT) offers the High Pressure 500 Flosert miniature flow-regulating valve that is pressure-compensated to provide a constant flow over a range of pressure differentials. The valve is suited for high-pressure hydraulic applications with system pressures up to 5000 psi. Available in forward and reverse regulated flow configurations, the valve is constructed entirely of stainless steel. Regulated flow rates are available from 1.5 to 5.0 GPM.

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Torque Limiters

Zero-Max (Plymouth, MN) offers torque limiters in very large models for handling up to 37,000 foot pounds or 50,000 Newton meters of torque. These very large torque limiters are designed to protect drive trains, gearboxes, and generators from excessive peak loads. Features include factory preset torque, maximum bore sizes up to 5-1/2" or 140 mm with or without keyway, operating temperature range from -40 to +80 °C, and no maintenance. Custom torque limiters are available for all applications.

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Servo Drive

Technosoft (Bevaix, Switzerland) offers the iPOS3602 MX micro-sized, pluggable servo drive for motion control applications where space is critical. The drive can be integrated into the user’s motherboard or PCB machine. All basic motor control functions, as well as motion control and PLC features, are embedded onto the drive. Equipped with CAN/CANopen, and optionally with an EtherCAT interface, the drive can be adapted to the decentralized control of any rotary or linear brushless, DC brush, or step motor up to 75W. Setup, tuning, and motion programming are done with EasyMotion Studio and Technosoft Motion Language (TML). Multiple operations can be executed with the drive, including setting of various motion modes, change of motion modes and/or parameters, execution of homing sequences, or program flow control.

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Servo Motor

Beckhoff Automation (Burnsville, MN) has released the AM8000 servo motor series featuring single-cable technology that combines the power and feedback system into one standard motor cable. The encoder data, rotor position, multi-turn information, and status of the thermal conditions in the motor are transmitted via a digital interface. The series consists of six different motor sizes, each with two or three optional overall lengths. Users can select from a stall torque range of 0.9 to 65 Nm. Salient pole winding technology is used in the rotor, which enables a higher slot fill factor. Small end turns, in conjunction with a fully encapsulated stator, provide thermal management.

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Digital Torquemeter

The MCRT® 88700V dual-range digital torquemeter from S. Himmelstein (Hoffman Estates, IL) measures torque even if the ratio of peak to average torque is high, such as when starting, stopping, or reversing highinertia loads. When peak torques are unknown, the torquemeter reduces the risk of damage from unexpected or accidental torque spikes. The unit features three simultaneous analog outputs that can be individually set to 5 or 10V at each range full scale. Over-range is 150 to 300%, and mechanical overload is 200% of the high range and 1000% of the low range. Digital output of torque, and speed and power with option Z, is available over the resident RS-232 serial port. Included software interfaces with Windows-based PCs for data display and collection, and instrument setup.

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Acceleration Sensors

Bosch Sensortec (Reutlingen, Germany) has introduced the BMA280 and BMA255 triaxial acceleration sensors with 14-bit and 12- bit resolutions, respectively. The sensors are available in a 2 × 2 mm LGA package and measure changes in acceleration as low as 0.25 milli-g. They feature a low noise level of 120 micro-g/vHz for the BMA280, and 150 microg/ vHz for the BMA255.

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