Product Overview
The FEETECH STS3020 is a high-performance serial bus smart servo designed for robotic joints, robotic arms, intelligent motion systems, and educational robotics applications. Equipped with a magnetic encoder, closed-loop feedback system, and TTL serial bus communication, the STS3020 delivers precise position control, high responsiveness, and stable long-term operation.
Compared with traditional potentiometer servos, the STS3020 features 360° absolute angle control, higher resolution, parameter feedback, and programmable multi-mode operation, making it ideal for advanced robotics and automation projects.
Key Features
- High torque 20KG-class smart bus servo
- Magnetic encoder with 4096-step resolution
- 360° programmable rotation control
- TTL serial bus communication
- Real-time feedback for position, speed, voltage, temperature, and load
- Closed-loop intelligent control system
- Supports single-servo and multi-servo networking
- Aluminum middle case for improved heat dissipation
- Multi-platform development support
- Compatible with Arduino, STM32, PC, JAVA, C++, and C#
Technical Specifications
| Item | Specification |
|---|---|
| Model | STS3020-C001 |
| Brand | FEETECH |
| Dimensions | 40 × 20 × 40 mm |
| Weight | 62 g |
| Operating Voltage | 5.5V – 8.4V |
| Operating Temperature | -10°C to 60°C |
| Sensor Type | Magnetic Encoder |
| Communication Interface | TTL Bus |
| Communication Protocol | Half-Duplex UART Serial |
| Baud Rate | 38400 – 1000000 Bps |
| Output Shaft | 25T |
| Position Resolution | 4096 Steps |
| Rotation Range | 360° Programmable |
| Control Signal | TTL Level Bus Data |
| No-load Current | 240mA @7.4V |
| Stall Current | 2400mA @7.4V |
| Stall Torque | 22.5kg.cm @7.4V |
| Rated Torque | 7.5kg.cm @7.4V |
| No-load Speed | 0.149 sec/60° (67RPM) @7.4V |
| Parameter Feedback | Load / Position / Speed / Voltage / Current / Temperature |
Product Advantages
360° Magnetic Encoder Control
Uses a high-resolution magnetic encoder supporting 4096-step positioning with programmable 360° control and multi-turn capability.
Closed-loop Smart Feedback
Real-time monitoring and feedback of:
- Position
- Speed
- Voltage
- Current
- Temperature
- Load status
Improves control accuracy and operational safety.
High Torque Performance
Provides up to 22.5kg.cm stall torque at 7.4V, suitable for robotic joints and lightweight robotic arm applications.
Flexible Motion Modes
Supports:
- Servo angle control mode
- Continuous rotation wheel mode
- Step control mode
- Position control mode
Multi-servo Networking
Supports independent or synchronized multi-servo control through TTL serial bus communication.
Fast Communication Response
Supports baud rates up to 1Mbps for low-latency real-time motion control.
Intelligent Protection
Integrated protection features include:
- Overcurrent protection
- Overvoltage protection
- Overtemperature protection
- Stall protection
Aluminum Middle Housing
Enhanced structural rigidity and improved heat dissipation compared to standard plastic servos.
Typical Applications
- Robotic arms
- Humanoid robots
- Educational robotics
- Motion control systems
- AI robots
- DIY robot projects
- Automation equipment
- Smart actuators
- Pan-tilt systems
- Robot joint mechanisms
Package Includes
- 1 × FEETECH STS3020 Smart Servo
- 1 × Servo Cable
- Mounting Accessories
Development Support
Supports secondary development under:
- Arduino
- STM32
- PC Software
- JAVA
- C++
- C#
Provides:
- Communication protocol documentation
- Memory table documentation
- Serial debugging assistant software
- Example development routines
Important Notes
- Performance specifications are measured at 7.4V.
- Recommended continuous working torque is 1/3 to 1/5 of stall torque.
- Actual positioning precision depends on mechanical structure and load conditions.
- Recommended grouped power supply when using multiple servos simultaneously.
