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Created on 07.15

How to Optimize Torque Selection for Collaborative Robot Joints

In the design of modern collaborative robot arms, torque selection is the most critical factor determining payload capacity, safety, and motion precision. Selecting the right joint modules is not just about raw power; it is about balancing efficiency with compact architecture.
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Here is a concise guide on how to optimize torque selection for your next robotic projects.
1. Calculate Dynamic vs. Static Load
When evaluating actuators, engineers must distinguish between holding torque and dynamic torque. For collaborative robot arms, the joint modules at the base (J1-J3) require high peak torque to overcome inertia during acceleration, while the wrist joint modules prioritize high-speed response.
2. Prioritize Torque Density
The "Golden Ratio" of robotics is the torque-to-weight ratio. Using heavy actuators adds unnecessary mass, reducing the net payload. Optimized integrated joint modules allow for a slimmer arm profile. By choosing joint modules with high torque density, you can achieve a higher payload on a 6-DOF system without increasing the robot's overall footprint.
3. Ensure Zero-Backlash Precision
For delicate tasks, the transmission system within the joint modules must be flawless. Integrated joint modules featuring high-precision harmonic reducers ensure that torque is delivered smoothly without backlash, which is essential for the repeatability of collaborative robot arms.
4. Seamless Integration and Connectivity
Modern actuators should be "Plug-and-Play." Selecting integrated joint modules that combine the motor, reducer, encoder, and driver into one housing simplifies the wiring process for collaborative robot arms, reducing electromagnetic interference and potential points of failure.
The YiAxis Advantage: YR-Series Integrated Joint Modules
At YiAxis Robot, we have mastered the science of motion. Our YR-Series joint modules are specifically engineered to solve the toughest integrated challenges in collaborative robot arms.
  • Flagship Performance: Our joint modules deliver up to 762N.m peak torque.
  • Micron-Level Accuracy: Every one of our actuators features ± 0.001° repeatability.
  • Mature Ecosystem: We provide mass-produced integrated joint modules from Ø170mm, ensuring a perfect fit for every robotic joint.
Whether you are building a lightweight 1kg research arm or a heavy-duty 5kg industrial cobot, our integrated joint modules provide the reliability and power your system demands.
Ready to optimize your robot's performance?
Explore our full range of integrated joint modules and actuators at www.yiaxisrobot.com or download our technical catalog today.

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