Introduction
Different robots have vastly different servo motor requirements. This article provides selection strategies for robotic arms, drones, wheeled/tracked robots, and quadruped robots.
1. Robotic Arms: Dual Challenges of Precision and Torque
- Requirements: High repeatability (±0.1°), high joint torque (>20 kg·cm).
- Recommended Model: Dynamixel AX-12A (digital bus control, 12-bit encoder).
2. Drones: Lightweight and Fast Response
- Key Metrics: Weight (<50g), speed (0.1s/60°).
- Example: TowerPro MG90S (9g, 2.5 kg·cm), ideal for control surfaces.
3. Wheeled/Tracked Robots: Continuous Rotation and Waterproofing
- Modification: Remove servo limiters for 360° rotation, paired with encoders for closed-loop control.
- Outdoor Option: Savox SW-1210SG (waterproof metal housing).
4. Quadruped Robots: Dynamic Stability
- Special Needs: Shock resistance (metal gears), high burst torque (sudden load changes).
- Reference: MIT Cheetah 3 uses custom brushless servos (expensive); hobbyists can use JX-PDI-5502MG as an alternative.
Conclusion
Application dictates specifications—Robotic arms prioritize precision, drones focus on speed, and quadrupeds balance torque and dynamic response.
