eRob70I Robot Joint Module

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.

Built-in Servo Driver: Versatile Communication Protocols

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.

Communication Protocols

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.

Built-in Dual Absolute Encoder for High-Accuracy Position Control

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.

Integrated Friction Brake for Safety and Stability

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.

Friction Brake Inside

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.