"For servo motors in such a compact size, this is a unique technical feature," emphasizes Carolin Ank, Product Manager at Wittenstein cyber motor. "Corresponding solutions in this size have hardly been available on the market to date. Either high-maintenance pneumatic cylinders are used, which cannot be flexibly controlled, or solutions with an open spindle are used, which are not suitable for industrial applications."

The small servomotors, which are maintenance-free thanks to their lifetime lubrication system, complement the portfolio of rotary servomotors and servo actuators in the 'cyber dynamic line' product family. They are suitable for highly dynamic positioning axes of machines as well as for joining, bending, gripping or dosing in forming and handling technology, the semiconductor industry, assembly automation and packaging machines. The stainless steel version with protection class IP65 is ideal for filling and other systems in the food and beverage industry.

Carolin Ank, Wittenstein cyber motor: "The solution offers users the advantage of having a compact, fully integrated unit consisting of servo motor, screw drive, anti-rotation lock and encoder system."

© Wittenstein

Four sizes are available with outer diameters of 17, 22, 32 or 40 mm. The complete actuator is housed in a stainless steel housing with IP54 protection and is suitable for any installation position. The spindle itself is maintenance-free and torsion-proof in a closed thrust tube. The spindle drive in conjunction with the reinforced bearing enables the force to be applied in both the push and pull directions. A singleturn absolute encoder with a resolution of 12 bits is available as an encoder system for all sizes. For sizes 32 and 40, customers can rely on the smallest integrated multiturn encoder currently available. All sizes also offer EMC-safe single-cable technology suitable for drag chains.

In contrast to pneumatic cylinders, the small servomotors enable precise and flexibly controllable positioning processes in every application without the need for retooling the machine. They are therefore also suitable for applications with frequent format changes.

In conjunction with Wittenstein's servo controllers from the "simco drive" series, the small servo motors can be configured as small servo axes. This results in systems that can be integrated into higher-level control systems via CANopen, EtherCAT, Profinet RT/IRT or EtherNet/IP. The software features for safe commissioning include an automatic end position limiter: it prevents the actuator's mechanical stops from being approached dynamically. In addition, an electronic homing mode allows the machine operator to freely define and reference the 0 position.

"The solution offers users the advantage of having a compact, fully integrated unit consisting of a servo motor, screw drive, anti-rotation lock and encoder system," summarizes Ank. "The linear actuators enable precise and flexibly controllable positioning processes and can be easily integrated into the higher-level control environment in conjunction with the 'simco drive' control unit."