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SEW showcases CMP servo extension at NMW

The new CMP models complement the existing CM and CMP servo series, and offer premium dynamics and accuracy in a light-weight, compact form-factor, providing higher torque density than competing servo units.

The new higher-torque models of the extended CMP range can be provided with a choice of two brake torques, and two rotor inertias. “These new models give manufacturers the choice between a high and a low motor inertia,” said SEW-Eurodrive Victorian sales and product Manager, Darren Klonowski.

“We recommend a ten-to-one ratio between the motor inertia and the load inertia to optimise stability and motor control. Having the choice of two rotor inertias for each model allows for optimal matching of the servo to the manufacturing application – all from a single series of servo motors.”

The clever design of the CMP range has resulted in a low-weight compact unit, boasting high-torque density. Furthermore, the entire CMP servo range possesses premium dynamic characteristics, which stem from its particularly low inherent mass-moment of rotor inertia. In addition it offers a particularly high ‘four times rated torque’ overload capacity, and cogging levels minimised to below two per cent. Whisper quiet, the CMP servos retain emitted sound levels to between 55 and 75 dBA at all speeds.

Uniquely, the CMP servos are complemented by SEW-Eurodrive’s wide range of high-precision and standard gear units. “In-house engineering of the servo drive/gear unit pair provides huge end-user advantages,” said Klonowksi. “It not only permits fast turn-around of the complete servo assemblies, but allows direct mounting of the gear units. As a result, the complete servo assemblies can be built up without mounting adaptors or couplings. This ensures that the servo units are as short and compact as possible, achieve minimal backlash performance, and can be assembled quickly and easily.”

The extended CMP servo series is provided with an industry-standard round ‘canon’ plug connectors (both for power, and resolver/encoder connections) to increase equipment compatibility and to ensure speedy on-site installation and servicing when combined with pre-manufactured cable assemblies.

An extensive range of options is available with the CMP servo. The standard robust resolver can be upgraded by a precision ‘Hiperface’ absolute encoder, and the standard connector can be replaced on request with a terminal box. Further options include a choice of forced-cooling fans, and a square flange alternative to allow for direct machine mounting.

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