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Highly Integrated: Incorporates 8 core components, delivering a complete "plug-and-play" joint solution.
Powerful Performance: Provides a continuous output torque of up to 35N.m, handling various load scenarios.
Compact & Lightweight: With a 70mm outer diameter and weighing only 0.77kg, it achieves excellent power density and space efficiency.
Simplified Development: Significantly reduces mechanical and electrical complexity, accelerating the journey from concept to prototype.
8 Core Components for eRob Series Robot Joint Actuator
The eRob series robotic joint module is a highly integrated all-in-one solution that combines eight core components: a servo motor, high-precision harmonic gear reducer, dual absolute encoders, servo drive, friction brake, temperature sensor, and virtual torque sensor. This innovative design eliminates the need for complex external component selection and integration, providing users with a plug-and-play power unit that significantly simplifies the robotics development process. It is an ideal choice for building high-performance collaborative and humanoid robots.
The eRob series robot joint actuator features a built-in servo driver supporting multiple industrial communication protocols. It is compatible with EtherCAT, CANopen, and Modbus for seamless integration into various control systems. The driver allows for real-time adjustment of the Position, Speed, and Current loop PID parameters, ensuring precise motion control. Additional interface flexibility is provided through built-in ±10V analog input, Pulse and Direction inputs, I/O ports, and RS485. It also includes an external encoder interface and a Safety Torque Off (STO) interface for enhanced functionality and safety.
With EtherCAT, CANopen, Modbus communication protocols.
Position, Speed, Current loop PID adjustable in real-time.
Built-in ±10V analog input.
Pulse and direction, I/O, RS485.
External encoder and STO interface.
This robotic joint module incorporates a dual absolute encoder system for exceptional accuracy and reliability. The output shaft is equipped with a 19-bit absolute multi-turn encoder, enabling repeatable positioning with a repeatability of up to ±7 arc seconds. The system achieves an absolute accuracy of up to ±15 arc seconds. A key advantage is that the module always retains the real absolute position and multi-turn counter even after a power-off event, eliminating the need for homing procedures upon restart and ensuring immediate operational readiness.
The eRob series robot joint actuator features an internally integrated friction brake designed for smooth and stable operation. Its key benefits include zero backlash and no physical gap, contributing to highly precise motion control. Unlike traditional brakes, it requires no corrective movement upon power-on, reducing wear and tear for increased longevity and maintenance-free performance. This robust brake mechanism can also be reliably utilized as an Emergency Stop function, enhancing the overall safety of the robotic system.
Brake smooth and stable.
No gap; no backlash.
No need to move when power-on.
No wear and tear.
Can be used as Emergency Stop.
Application of robot joint modules
Our robotic joint modules can be widely used in the following industries: in the field of industrial robotics, they are used for welding, spraying, and assembly on automotive and 3C electronics production lines; in the medical and healthcare field, they are applied in laparoscopic surgery and exoskeleton robots; in the logistics and warehousing field, they are used for handling and sorting in confined spaces; in the cutting-edge technology field, they serve as the core joints for humanoid robots and bionic robots. With their high precision, high torque density, and modular design, our products can significantly simplify the structure of robotic arms.
| Model | eRob70H | |||||
| Strain wave gear-ratio | 14-50 | 14-80 | 14-100 | 14-120 | ||
| Peak torque for start and stop(Nm) | 23 | 30 | 36 | 36 | ||
| Permissible max.value at average load torque(Nm) | 9 | 14 | 14 | 14 | ||
| Rated torque(N.m) | 7 | 10 | 10 | 10 | ||
| Permissible maximum momentary torque(Nm) | 46 | 61 | 70 | 70 | ||
| Max. output rotational speed(RPM) | 60 | 37.5 | 30 | 25 | ||
| Power Input Voltage(V) | 48V (±10%) Please make sure to read "Comparison of Switching Power Supply and ePower" and the “eRob Rotary Actuator User Manual” Chapter 3, for clear instructions on powering the eRob module. | |||||
| Version | V4 | V5 | ||||
| Motor power(W) | 100 | |||||
| SWG Output Side Inertia(g-mm2) | 69717 | 68484 | ||||
| SWG Output Side Mass(KG) | 0.17 | 0.166 | ||||
| SWG Input Side Inertia(g-mm2) | 47767 | 22674 | ||||
| Without Brake | SWG Input Side Mass(kg） | 0.18 | 0.087 | |||
| OD * Length(mm) | Φ70x75.3 | Φ70x71 | ||||
| Total Mass(kg) | 0.87 | 0.82 | ||||
| SWG Input Side Inertia(g∙mm²) | 50996 | 26128 | ||||
| With Brake | SWG Input Side Mass(kg) | 0.19 | 0.1 | |||
| OD * Length(mm) | Φ70x75.3 | Φ70x71 | ||||
| Total Mass(kg) | 0.93 | 0.88 | ||||
| Common parameters | ID: 18mm, IP grating:IP54*, Brake model: friction brake | |||||
| Optional device | Communication type: EtherCAT / CANopen/Modbus, Output encoder resolution: 19Bit. Repeatability/Accuracy: ±7/±15 arc seconds or ±10/±25 arc seconds. | |||||
| Precision | Repeatability/Absolute Accuracy: ±7/±15 arc sec or ±10/±25 arc sec* | |||||
| Electrical Interface | Communication Protocol:EtherCAT/CANopen/Modbus,Output-side Encoder Resolution:19/20Bit | |||||
