57 mm Closed-Loop Stepper Motor with 3.0 N·m Torque

The iESS57-36-30-17BC-RC is a 57 mm integrated stepper motor with 3.0 N·m holding torque and 4.0 A phase current, powered from 36 VDC and controlled over RS485+CAN. A 17-bit absolute encoder closes the loop around the rotor position.

Frame Size and Torque

The 57 mm frame is a middle ground between the 42 mm and 60 mm sizes. Delivering 3.0 N·m from this frame requires the full 4.0 A winding current, which the integrated drive supplies directly at the motor.

Closed-Loop Operation

The absolute encoder reports position without a reference run, and the closed loop corrects load-induced step loss. This keeps positioning repeatable on axes with variable friction or load.

Specifications

• Frame size: 57 mm
• Holding torque: 3.0 N·m
• Supply voltage: 36 VDC
• Rated current: 4.0 A
• Fieldbus: RS485 + CAN
• Encoder: 17-bit absolute
• Control: closed-loop

Thermal Behavior

At 4.0 A the winding loss is moderate, but the integrated drive raises the housing temperature during continuous use. Provide airflow and a metal mounting path, and treat 3.0 N·m as the static limit for thermal design.

Applications

• Factory automation
• Packaging machinery
• Robotics
• CNC machine tools

Contact Lyenwsin for the torque-speed curve and RS485 addressing guide.