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Datasheet
ST-5420-C001 High-Speed Smart Servo With 25 kgcm Torque, Coreless Motor And 12-Bit Magnetic Encoder
The ST-5420-C001 is a high-performance TTL serial-bus smart servo designed for industrial robotics, robotic joints, automation equipment, and compact motion-control systems. Operating at 7.4V, it delivers up to 25 kg.cm peak stall torque with a no-load speed of 0.111 sec/60deg or approximately 90 RPM. Its 12-bit magnetic encoder provides 4096-position resolution across 360deg, enabling precise closed-loop angular positioning.
The servo combines an aluminium case, steel gearbox, coreless motor, and ball bearings for reliable mechanical performance. It supports 0-360deg position control and multi-turn continuous operation, while TTL serial-bus communication enables command, configuration, and real-time feedback. Position, speed, voltage, current, temperature, and load data can be monitored by the host controller, supporting intelligent motion control and protection in demanding robotic applications.
Key Features
- 25 kg.cm Stall Torque: Delivers up to 25 kg.cm peak stall torque at 7.4V for robotic and industrial drive mechanisms.
- 90 RPM High-Speed Operation: Provides a no-load speed of 0.111 sec/60deg at 7.4V.
- 360deg Position Control: Supports programmable positioning throughout a complete 0-360deg rotation.
- Multi-Turn Operation: Supports continuous multi-turn movement for applications requiring extended rotary travel.
- 12-Bit Magnetic Encoder: Provides 4096-position resolution across 360deg for accurate position feedback.
- TTL Serial-Bus Control: Uses digital packet communication for command, configuration, and feedback.
- Coreless Motor: Provides responsive acceleration and smooth operation for dynamic robotic mechanisms.
- Steel Gearbox: Uses steel gears for durable torque transmission under demanding mechanical loads.
- Aluminium Case: Provides a rigid enclosure with effective heat dissipation and mechanical protection.
- Single-Shaft Design: Provides one controlled mechanical output axis for robotic joints and rotary mechanisms.
- Ball Bearings: Support smooth output-shaft movement and help reduce mechanical friction.
- No Mechanical Angle Limit: Supports 360deg and multi-turn operating modes without a fixed mechanical stop.
- Acceleration Control: Enables slow-start and slow-stop movement for smoother motion.
- One-Key Centre Setting: Supports convenient configuration of the servo middle position.
- Real-Time Feedback: Reports position, speed, voltage, current, temperature, and load information.
- Overload Protection: Load monitoring supports protection against excessive mechanical stress.
- Addressable Servo IDs: Supports ID values from 0 to 253 for multi-servo networks.
- High-Speed Communication: Supports serial communication from 38400bps to 1Mbps.
- 25T Output Spline: Uses a 25T output spline with 5.9mm outside diameter for compatible servo horns.
Applications
- Industrial robotics
- Robotic arms
- Robot joints
- Humanoid robots
- Quadruped robots
- Industrial automation
- Automated positioning systems
- Pan-and-tilt mechanisms
- Mobile robots
- AGV systems
- Research and development platforms
- Multi-servo robotic systems
- Compact actuator mechanisms
- Embedded motion-control systems
Diagram
