Mitsubishi Electric HG-SR102 MELSERVO-J4 Series Rotary Servo Motor

Description

Operating within the 200V power class, this high-performance medium-inertia rotary unit, identified as the Mitsubishi Electric HG-SR102, delivers continuous torque for automated positioning applications. Built for integration with the MELSERVO-J4 platform, it provides precise motion control in demanding factory automation settings. Featuring a high-resolution 22-bit encoder, this motor offers exceptional dynamic response and position feedback reliability, making it suitable for material handling, indexing, and high-speed packaging machinery.

Features

• High-Resolution Feedback: 22-bit absolute/incremental encoder delivers 4,194,304 pulses per revolution for ultra-precise speed and position control.
• Robust Rotor Inertia: Medium-inertia design ensures stable rotation and smooth torque delivery, especially during load variations.
• Industrial Protection: Fully enclosed, self-cooled frame with an IP67 rating (excluding shaft-through portion) protects internal windings from dust and water spray.
• Extensive Drive Compatibility: Seamlessly pairs with J4-100GF, MR-J4-100B, and MR-J4-100A servo amplifiers.
• High Peak Torque Capacity: Delivers a maximum instantaneous torque of 14.3 Nm, providing rapid acceleration and braking profiles.

Applications

• Automated assembly systems and robotic pick-and-place gantry configurations.
• Multi-axis packaging, filling, and labeling machinery.
• High-speed rotary indexing tables and rotary knife actuators.
• Material handling conveyors and automated warehousing storage/retrieval lifters.

Technical Specifications

Empirical Engineering Insights

Alternative Models & Compatibility

When migrating legacy automation lines from older HC-SFS102 series motors to the modern MELSERVO-J4 architecture, the HG-SR102 acts as the direct functional equivalent. However, note that encoder connection cables and physical dimensions differ between the series; retrofit adapters and updated cabling are required to interface successfully with MR-J4 series amplifiers.

Application Pitfalls & Engineering Notes

Operating the motor inside small, completely sealed enclosures without external cooling plates can cause localized heating. The motor relies on its mounting flange to dissipate heat; ensure the mounting surface meets the minimum area and thickness guidelines outlined in the MR-J4 manual to prevent thermal overload faults (E7 or E9). Standard HG-SR series motors do not include an integrated oil seal. For setups mounted to oil-bath gearboxes or subjected to splashing oils, opt for the HG-SR102J variant to prevent winding degradation.

Commissioning & Wiring Tips

The high-frequency signals from the 22-bit serial encoder are sensitive to electrostatic discharge and EMI. Always route encoder cabling through a dedicated, grounded steel conduit or keep it at least 30 cm away from main power lines (U/V/W phase lines). Ground the motor housing directly to the amplifier ground plate using an ultra-low impedance bonding strap to eliminate floating potential errors.

Installation Guidelines