Product Description:

The AKM21C-ANSNAB-02 is a synchronous servo motor manufactured by Kollmorgen within the AKM Synchronous Servo Motors series. As a compact rotary actuator, it supplies closed-loop torque and position control for indexing tables, small gantry axes, and other duties that benefit from permanent-magnet dynamics. Its design aligns with IEC flange conventions so it fits standard gearheads or direct-drive mounts used throughout industrial automation.

This motor is supplied without a brake, so any load-holding function must be handled externally or through drive torque. Position feedback is provided by an optical encoder that delivers 2048 lines/rev; after quadrature interpolation, the control system receives high-density position data for fine velocity regulation. Communication between the encoder and the drive occurs through the open, differential serial channel identified as the BISS B encoder, ensuring synchronous transmission with low latency. Because the scanning head counts multiple mechanical revolutions, the feedback is classified as multi-turn optical, eliminating the need for a homing cycle after power loss. The mounting interface follows IEC with accuracy N, establishing concentricity and runout limits that support repeatable coupling alignment. Feedback style AD34/AD58 is specified, enabling direct compatibility with Kollmorgen AKD drives, and winding designation C tailors the stator to applications that favor moderate base speed with increased torque per ampere.

The housing width measures 58 mm, fitting within the manufacturer’s size 21 frame envelope. Power, feedback, and grounding conductors exit through a special connector arrangement that rotates relative to the stator body to ease cable routing in tight cabinets. A smooth shaft avoids key stress concentrations and matches clamp-style couplings used on precision reducers. Mechanical output length is set by Rotor Length Index 1, balancing inertia with rated torque so the motor accelerates light loads quickly while staying within thermal limits.