12 N·m closed loop Stepper Motor with Integrated Drive

The iESS86-80-120-17BC-RC/EC is a 12 N·m closed loop Stepper Motor in an 86 mm frame, the highest-torque unit in this integrated range. Rated at 6.0 A on an 80 VDC bus, it combines a 17-bit absolute encoder with RS485+CAN or EtherCAT fieldbus, all in one body. For heavy-duty axes that would normally require a separate drive in its own cabinet, this unit keeps the drive on the motor without giving up load capacity.

High Torque in a Single Unit

Torque in the 12 N·m range normally requires a separate drive with its own cabinet. This model keeps the drive on the motor, so heavy-duty axes gain the benefit of integrated construction while retaining the torque needed for ball-screw feed axes, rotary tables, and large gantry mechanisms.

80 VDC Bus

The 80 VDC supply allows higher phase voltage, which supports faster step rates and better torque at speed. The 6.0 A current rating and 12 N·m holding torque define the static capability; usable torque at speed is read from the torque-speed curve.

Fieldbus and Feedback

RS485+CAN and EtherCAT variants are available. The 17-bit absolute encoder provides rotor position at power-up, so a heavy table or arm does not need a homing move after a restart.

Specifications

• Frame size: 86 mm
• Holding torque: 12 N·m
• Supply voltage: 80 VDC
• Rated current: 6.0 A
• Fieldbus: RS485 + CAN / EtherCAT
• Encoder: 17-bit absolute
• Control: closed loop

Thermal Management

At 6.0 A the windings generate significant heat during continuous duty. Bolt the 86 mm flange to a substantial metal surface and keep the housing clear so the closed loop can operate at rated torque for sustained periods.

Applications

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

Engineering Notes

For rotary tables and gantry axes, check the reflected inertia at the motor shaft and confirm it stays within the recommended range for the frame. Provide a regulated 80 VDC bus sized for the 6.0 A peak draw. Contact Lyenwsin for the 12 N·m torque-speed curve and mounting dimensions.