Mitsubishi Electric HF-SP81MK-S2 Servo Motor

Module Feature

Mitsubishi HF-SP81MK-S2 belongs to HF-SP series MELSERVO-J3 brushless AC servo motor. Rated power 850W, equipped with built-in electromagnetic holding brake and 18-bit absolute encoder. High torque density, low vibration and high positioning accuracy. IP66 protection rating, robust housing suitable for harsh workshop environment. Widely used on CNC machine tools, industrial robots and automation production lines.

Working principle: Permanent magnet synchronous motor converts electrical energy into rotary mechanical motion. The built-in absolute encoder feeds back real-time rotor position to servo drive for closed-loop position and speed control. Onboard components: Permanent magnet rotor, stator winding, 18-bit absolute encoder, electromagnetic brake, metal housing, power connector and encoder connector

LED indicatorsStatus LED indicators on matched MR-J3 servo drive

Hardware self-diagnosis

Visual inspection, winding resistance test, encoder signal test, brake function test, rotation run-in test

Programming software

Mitsubishi MR Configurator software for parameter setting, gain tuning and fault diagnosis

Electrical & Process Parameters

Rated power:850W Rated voltage:200V AC Encoder:18-bit absolute encoder Brake:Built-in electromagnetic holding brake Protection class:IP66 Shaft:Keyed shaft

Mechanical & Structure

Mounting:Flange mounting Protection class:IP66

Environmental

Operating temperature:0℃ ~ +40℃ Ambient humidity:5~95% non-condensing Certification:CE compliant Status:Mitsubishi HF-SP series servo motor

System compatibility

Compatible with Mitsubishi MR-J3 series servo amplifier for closed-loop motion control system of CNC and automation equipment.

Function

HF-SP81MK-S2 AC servo motor manufactured by Mitsubishi Electric. It delivers precise speed and position control for motion axis. Built-in brake keeps axis stationary under power-off condition. Winding aging, encoder contamination or brake failure will cause positioning error or axis slipping. It is high performance motion component for CNC machining and industrial automation.

Installation

Follow lockout/tagout safety procedure before installation. Power off servo drive and release residual voltage. Mount motor on mechanical flange, couple shaft to load. Connect power cable and encoder cable. Perform parameter setup and origin homing before production startup.

InterfacePower connector, encoder connector, status LED indicators on matched servo drive of HF-SP81MK-S2.

Diagnostic

Position deviation: Encoder fault or mechanical backlash. Motor overheat: Overload or insufficient cooling. Brake not releasing: Brake circuit abnormality. Vibration & noise: Shaft misalignment or bearing wear.

Product Brief

HF-SP81MK-S2 Mitsubishi Electric HF-SP series AC servo motor,850W,built-in brake,18-bit absolute encoder,IP66,for CNC machine tools and industrial automation precise motion control.