In the era of Industry 4.0 and advanced robotics, the demand for power sources in automation has reached unprecedented levels: higher torque density, compact footprints, extreme accuracy, and uncompromising safety. **Harmonic Rotary Actuators** have emerged as the definitive solution for high-precision joints and motion control, thanks to their zero-backlash operation, high reduction ratios, and ultra-compact integration. This guide explores the key advantages of Harmonic Rotary Actuators, addresses technical design considerations with practical engineering solutions, and offers a comprehensive technology comparison to streamline your selection process.

This article will provide you with a comprehensive analysis of a robot's rotary joint, including its integrated components, the role of each component, and how precise control is achieved.

The core reason lies in one unavoidable requirement: high degrees of freedom. High DOF is essential for humanoid robots, and this directly leads to harmonic joint modules accounting for a consistently high proportion of total system value.

Frameless torque motors, unlike traditional servo motors, consist only of stator and rotor components. Compared to framed motors, frameless motors offer flexible configuration and easy installation. Considering the increasing trend of highly integrated drive systems, frameless motors better meet the expectations of engineers. Engineers no longer need to consider motor interfaces in system design, allowing for maximum reduction of space occupied by the power output unit in the drive system, leading to higher system integration.The HONPINE FMK frameless torque motors are now widely used in the J1–J6 joints of collaborative and dual-arm robots, the walking joints of quadruped robots, and the flexible joints of humanoid robots.