stepSERVO range expands with NEMA 34 and dual-port Ethernet

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stepSERVO range expands with NEMA 34 and dual-port Ethernet stepSERVO integrated motors from Applied Motion Products Inc (AMP) are now available from Mclennan Servo Supplies in a new NEMA 34 frame-size option that offers closed-loop servo control with peak-torque performance of over 8Nm – up to 50 per cent more torque than equivalent stepper motors with open-loop control. The innovative microstepping motor-based system comprises a digital closed-loop servo drive, 20,000 count/rev feedback encoder and several options for motion control and communications in a single integrated package. The high-performance, energy-efficient range is now available in NEMA frame motor sizes from 11 through 34 and the new larger size stepSERVO includes dual-port Ethernet that paves the way for a full EtherCAT version offering tightly synchronised decentralised multi-axis motion control; this will follow later in 2016. Furthermore, IP65-sealed NEMA 34 frame versions are available for use in extreme environments.

Three types of stepSERVOs form the range. The SSM series is available in NEMA 23 frame sizes, in three motor length options and includes Ethernet/IP industrial networking. The TSM series covers NEMA 11, 17, 23 and 34 sizes in various stack lengths and control options that include CANopen, EtherNet/IP, Modbus RTU or TCP, as well as step-and-direction or analogue +/-10V control. The TSM's 'Q' controller allows standalone operation using stored programs. The TXM versions, available in NEMA 24 and 34 frame sizes, offer all the features of the TSM but are supplied with IP65-rated front shaft seals and M12 connectors for use in wet and dusty environments. Across all product variants, the stepSERVO operates from 24-70V DC except for the NEMA size 11 motor that requires 11-30V DC.

AMP's stepSERVO technology is fully explained in a white paper that is available for download from Mclennan's website. By developing this closed-loop stepper motor technology, AMP offers a compelling proposition for high-performance motion control applications in packaging automation, automated test, parts handling machinery, positioning stages, life science equipment and more with a motion control option that cost-effectively improves performance over open-loop steppers. With accuracy of up to one encoder count (0.18 degrees) and much improved peak torque the stepSERVO can significantly enhance parts precision and increase production throughput. Quiet and efficient operation and reduced running costs are other characteristic features of the range - the motors run cooler as they only consume current when required, and can hold torque at standstill. Furthermore, the integrated motor allows reduced installation cost and time for faster machine construction and fully complies with the decentralised machine control concept of Industry 4.0.

More information about stepSERVO integrated motors from Applied Motion Products can be found at

11 October 2016

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