High-Precision EtherCAT CAN Large Hollow Dual-Encoder Planetary Robot Joint Actuator

●  Introduction

To meet different market demands for harmonic joint actuator and planetary joint actuator, HONPINE introduces its 2026 new product — the Large hollow planetary robot joint actuator.
The planetary joint module integrates a high-efficiency planetary reducer, precision driver, and 24-bit high-precision dual encoders, while adopting an extra-large hollow shaft design and supporting CAN and EtherCAT communication protocols.
It provides an ideal drive solution for humanoid robots, industrial robots, collaborative robots, and industrial automation equipment.
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Features


Extra-Large Hollow Shaft Design


The HONPINE HPJM-RE planetary joint module series adopts a large hollow shaft design across the entire product line, with the hollow ratio exceeding 11%, enabling easier internal cable routing and improved system integration.


Self-Developed High-Precision 24-Bit Dual Encoder


HONPINE’s self-developed 24-bit dual encoder enables higher motion accuracy, more stable motion performance, more precise torque control, and improved closed-loop feedback control.


Backlash < 10 Arc-minutes


The ultra-low backlash design ensures smoother operation and higher positioning accuracy during equipment operation, significantly improving the repeatability and precision of automated systems.


Stable Operation up to ≤67°C


Designed with durability and thermal stability in mind, the module can operate continuously within a temperature range of 0–67°C while maintaining stable performance, making it suitable for demanding industrial environments.

Specification

Sheet 1

Joint ModelReduction RatioPeak Torque (N·m)
Rated Torque
(N.m)
Rated Speed
(RPM)
Operating Voltage
(V)
Encoder Resolution
(bit)
Communication ProtocolLength
(mm)
Weight
(kg)
Hollow Shaft Diameter
(mm)
HPJM-RE30-35-PG-25257.53.520024-2720/20CAN/EtherCAT57±0.50.253.5
HPJM-RE40-45-PG-252515518024-2720/20CAN/EtherCAT63±0.50.34.5
HPJM-RE50-53-PG-2525289.320024-2720/20CAN/EtherCAT60±0.50.46
HPJM-RE60-62-PG-25255016.718024-2720/20CAN/EtherCAT60±0.50.637
HPJM-RE80-88-PG-25251806018024-2720/20CAN/EtherCAT±0.51.7610
HPJM-RE100-105-PG2537512515024-10020/20CAN/EtherCAT85±0.52.7210