Product Description:

The 6SM 57S-3.000-G is a synchronous servo motor produced by Kollmorgen in the 6SM Synchronous Servo Motors series. It is designed for precision rotary positioning in automated machinery, where closed-loop control of torque and speed must be maintained with minimal settling time. By coupling to a compatible drive, the unit converts commanded current into controlled shaft rotation, enabling indexing tables, pick-and-place actuators, and packaging axes to follow exact motion profiles.

Under continuous operation, the motor delivers a rated shaft speed of 3000 rpm, a rated torque of 3 Nm, and a mechanical output of 0.95 kW while drawing a phase current of 2.7 A. Transient demands can be met with a peak current of 11 A, and the stator withstands a standstill current of 2.8 A that produces 4.6 Nm of holding torque when the shaft is locked. The rotor has an inertia of 3.1 kg·cm², which affects the acceleration and deceleration response of the motor. Thermal energy generated during operation is dissipated through the frame to help maintain stable rated performance. Radial loads up to 650 N can be applied to the shaft without exceeding bearing limits. The winding has an inductance of 35 mH and a resistance of 6.3 Ω, which influence current rise time and drive tuning.

For vertical or safety-critical axes, the integrated brake supplies a holding torque of 12 Nm and is energized at 24 VDC while consuming 18 W of brake power. Heat accumulation is governed by a thermal time constant of 20 min, allowing intermittent overloads without rapid temperature changes. The magnetic circuit converts input current to mechanical torque at a rate of 1.65 Nm/A, so commanded current can be translated into predictable force. The brake can secure the connected load when the axis is stationary, while the motor’s torque constant supports accurate control during motion.