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(1) Compact: 70mm diameter, built-in torque motor, harmonic reducer, encoder and driver.
(2) Precise Control: high torque/weight ratio, easy speed control and precise positioning.
(3) Lightweight: 0.77kg, ultra-light weight, keep the robot as light as possible.
(4) Easy to use: can be connected directly with the robot.
This robotic joint module has a compact design with an outer diameter of just 70 mm, making it ideal for space-constrained applications.
The 18 mm central hole allows for easy cable routing, simplifying installation.
Weighing only 0.77 kg, it reduces the overall weight of the robot, enhancing dynamic response and operational efficiency.
The eRob70 motor meets high precision and low energy consumption requirements, making it widely applicable in industrial automation and precision operations.
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.
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.
19bit absolute multiturn encoder for output shaft.
Repeatability up to ±7 arc seconds.
Absolute accuracy up to ±15 arc seconds.
Always have real absolute position and multi-turn counter when power-off.
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 | eRob70F | |||
| Harmonic reducer-ratio | SHD | SHD | SHD | |
| 14-50 | 14-80 | 14-100 | ||
| Start-stop peak torque(N.m) | 12 | 16 | 19 | |
| Permissible max.value at average load torque(Nm) | 4.8 | 7.7 | 7.7 | |
| Rated torque(N.m) | 3.7 | 5.4 | 5.4 | |
| Permissible maximum momentary torque(Nm) | 23 | 35 | 35 | |
| Max. output rotational speed(RPM) | 60 | 37.5 | 30 | |
| Motor power(W) | 75 | |||
| 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. | |||
| Strain wave gear output inertia(g-mm2) | 54030 | |||
| Without brake model | Inertia of rotor(g∙mm²) | 43656 | ||
| Outer diameter x length (mm) | 70x61.4 | |||
| Weight(kg) | 0.77 | |||
| With brake model | Inertia of rotor(g∙mm²) | 46885 | ||
| Outer diameter x length(mm) | 70x67.7 | |||
| ength (mm) | ||||
| Weight(kg) | 0.83 | |||
| 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. | |||
| EtherCAT version rotary actuator | Optional interface: RS485, Pulse/DIR, I/O, ±10V Analog and STO. | |||
| CANopen version rotary actuator | Optional interface: RS485, Pulse/DIR, I/O, ±10V Analog and STO. | |||
