Purchase now the Mitsubishi HG-MR43 — the compact, high-performance 400W servo motor engineered for precision motion control in the MELSERVO-J4 drive system.
What Is the Mitsubishi HG-MR43?
The HG-MR43 is a medium-inertia servo motor manufactured by Mitsubishi Electric, belonging to the HG-MR series designed to work exclusively with the MELSERVO-J4 servo amplifier family. With a rated output of 400W and a rated speed of 3,000 RPM, this motor is optimised for applications requiring compact size, high dynamic response, and accurate positioning — such as pick-and-place machines, packaging equipment, CNC axis drives, and semiconductor handling systems.
Key Technical Specifications
- Rated output: 400W
- Rated speed: 3,000 RPM
- Maximum speed: 6,000 RPM
- Encoder: 22-bit absolute encoder
- Inertia class: Medium inertia (HG-MR series)
- Compatible amplifier: MELSERVO-J4 series (MR-J4)
- Shaft: Straight shaft without key
- Ingress protection: IP65 (shaft seal excluded)
- Flange size: 60mm square
- Vibration class: V10 (10 µm or less)
Compatible Mitsubishi MELSERVO-J4 Amplifiers
The HG-MR43 is designed to pair with the following Mitsubishi MR-J4 servo amplifiers:
- MR-J4-40A / MR-J4-40B (400W, EtherCAT/SSCNET III)
- MR-J4-40A-RJ (with built-in positioning function)
- MR-J4W2-44B / MR-J4W3-444B (multi-axis amplifiers)
Always verify amplifier-motor compatibility using the Mitsubishi MELSERVO-J4 catalogue or the Mitsubishi Electric FA site before ordering.
Installation Advice
When mounting the HG-MR43, ensure the motor flange surface and mating machine surface are clean and free of burrs to guarantee accurate alignment. Use the correct coupling or direct drive arrangement — misalignment exceeding Mitsubishi’s tolerance will reduce bearing life significantly. Route the encoder cable separately from the power cable and maintain a minimum separation of 100mm to avoid encoder signal interference. Tighten all motor mounting bolts to the specified torque as under-torquing leads to micro-movement under load that degrades positioning accuracy. If the motor is to be stored before installation, keep it in a dry environment between 0°C and 55°C and rotate the shaft manually every three months to prevent bearing grease from settling.
Expert Tips
- When using the 22-bit absolute encoder, always perform the initial absolute position detection sequence after first power-up to establish the zero reference — failure to do so will trigger encoder alarms (AL.25) at every power cycle.
- If the application involves vertical axes, configure the MR-J4 amplifier’s servo-off deceleration and electromagnetic brake interlock settings to prevent axis drop during power-off conditions.
- For high-cycle applications (over 120 cycles/minute), monitor amplifier regenerative load ratio via MR Configurator2 — high regenerative duty may require an external regenerative resistor even at 400W output.
Frequently Asked Questions
Q: Is the HG-MR43 compatible with the older MELSERVO-J3 amplifiers?
A: No. The HG-MR series uses a different encoder interface and connector pinout that is not compatible with MR-J3 amplifiers. For J3 systems, the equivalent motor family is the HC-MFS/HC-SFS series.
Q: Can the HG-MR43 be used without an absolute battery?
A: Yes, it can operate in incremental encoder mode, but the absolute position will be lost on power-down and a homing routine will be required at each startup. For systems requiring absolute positioning without homing, install the MR-J4 absolute position battery unit (MR-BAT6V1SET).
Q: What is the difference between HG-MR43 and HG-MR43J?
A: The HG-MR43J variant includes a special shaft configuration (with key and tapped hole). The standard HG-MR43 has a straight shaft without key. Select the variant based on your coupling or pulley attachment method.
Do you need more references from this brand? Explore our full catalog of Mitsubishi here: https://atlantechdrives.com/manufacturers/mitsubishi/
