AKM21G-ENSN2-02 Kollmorgen
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The AKM21G-ENSN2-02 is a synchronous servo motor manufactured by Kollmorgen and part of the AKM Synchronous Servo Motors series. It features a frame dimension of 58mm, does not include a brake, and has a smooth shaft with a special connector arrangement. The motor uses a single turn optical feedback system with a feedback resolution of 2048 lines per revolution and an EPC 15T feedback type.
Internal Product Review
The AKM21G-ENSN2-02 is a Kollmorgen AKM synchronous servo motor with Comcoder feedback and 2048 lines/rev resolution. A single-turn optical feedback layout and smooth shaft support accurate positioning and straightforward mechanical integration. The special connector arrangement and brake-free configuration make this motor a clean, efficient choice for servo axis applications.
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Product Description:
The AKM21G-ENSN2-02 is a brushless servo motor produced by Kollmorgen in the AKM Synchronous Servo Motors series. This rotary unit converts drive current into controlled torque and speed for precise motion in industrial automation. Its compact design suits pick-and-place heads, indexing tables, and packaging machines that require fast, repeatable movement within a limited installation area.
The motor mounts on a 58 mm square frame, allowing direct attachment to small gearheads and installation within tight mechanical spaces. A smooth shaft supports clamp-style couplings that help minimize concentricity errors during rotation. Power and feedback cables exit through a special connector arrangement, which accommodates custom cable routing where panel depth is restricted. Position is measured by an optical encoder that delivers 2048 lines per revolution, providing detailed feedback for accurate speed and position control. The integrated Comcoder format combines incremental channels with reference marks to support rapid homing. Because the motor uses a single-turn optical sensor, position within one revolution is available without multi-turn mechanical components. A rotor length index of 1 keeps the magnetic stack short, reducing inertia for rapid acceleration and deceleration during short machine cycles.
Installation is simplified because the unit is supplied without a brake, eliminating separate release wiring on axes held by load balancing or drive torque. Static loads must therefore be restrained by the drive or an external mechanism whenever motor torque is unavailable. The encoder uses the EPC 15T feedback type, allowing compatible Kollmorgen drives to receive position data through standard differential inputs. The motor has winding designation G, which provides voltage and current constants suited to the low-to-moderate DC bus levels used in 24–48 V motion modules. This electrical profile supports compact automation systems that use lower-voltage power architectures. The short rotor and specialized connector layout also make the motor suitable for lightweight gantries and delta robots where low moving mass and quick cycle times are important.
