The ST3215 is a high-performance, intelligent serial bus servo engineered for advanced robotics and automation. Operating at 12V, it delivers a substantial 30kg.cm of torque, driven by a durable coreless motor and a high-strength metal gear train. Its core technology is a 12-bit high-precision magnetic encoder, which enables 360° absolute positioning with a resolution of 0.088°, offering superior accuracy and lifespan compared to traditional potentiometers. Communication is handled via a half-duplex UART serial bus, allowing up to 253 servos to be daisy-chained on a single port for simplified wiring and bi-directional data feedback. With four distinct operating modes, comprehensive electronic protections, and real-time parameter feedback, the ST3215 is an ideal solution for building complex robotic arms, quadruped robots, humanoid robots, and other sophisticated mechatronic systems.
360° High-Precision Magnetic Encoder
At the heart of the ST3215 serial bus servo is a 12-bit magnetic encoder that provides absolute position feedback over a full 360° range. With 4096 steps of resolution, it achieves a control accuracy of 0.088°, which is four times the resolution of conventional potentiometers. This non-contact sensing technology eliminates physical wear, leading to a much longer operational life. A key feature is the one-click midpoint calibration, allowing any position within the 360° range to be set as the new center point, greatly simplifying installation and maintenance.
High Torque & Durable Metal Gear Design
Engineered for demanding loads, the ST3215 serial bus servo provides a stall torque of 30kg.cm. The internal 1:345 gear train is constructed from a combination of copper and aluminum, ensuring high strength and low operational noise. Housed in a robust PA+GF casing, the servo is designed for reliability and longevity in applications requiring significant force and continuous operation.
Four Versatile Operating Modes
To accommodate a wide variety of applications, the ST3215 serial bus servo is equipped with four distinct operational modes.
Intelligent Serial Bus Communication
The ST3215 serial bus servo utilizes a TTL-level UART serial bus protocol, which enables daisy-chaining of up to 253 servos. This architecture drastically reduces wiring complexity in multi-axis robotic systems. The bus supports bi-directional communication, allowing not only for command execution but also for real-time feedback of critical parameters, including position, speed, load, voltage, and temperature. This capability is essential for creating closed-loop control systems and monitoring the health of the entire robotic assembly.
Advanced Control and Comprehensive Protection
The ST3215 serial bus servo integrates a suite of advanced features to ensure reliable and safe operation. The configurable acceleration start/stop function creates a smoother and more natural motion profile, reducing mechanical shock. Furthermore, built-in electronic protections guard against overload, overcurrent, overvoltage, and overheating conditions. These protections are customizable and automatically trigger to prevent damage to the servo, enhancing the overall system's robustness.
Applications:
Specification:
Electrical Characteristics
Mechanical Specifications
Control Characteristics
Overload: Triggers when stalled torque exceeds 80% of stall value for 2s; cleared by sending new position command. Customizable torque threshold/duration.
Overcurrent: Disables output when current >2A for 2s; cleared by sending new position command. Customizable current threshold/duration.
Overvoltage: Activates when voltage >7.4V or 4V; auto-recovery within normal range. Customizable voltage range.
Overheat: Disables torque output when temperature >70°C.
Mode 0: Angle Servo (default; 0-360° absolute positioning)
Mode 1: Speed Closed-loop Motor (maintains speed under load)
Mode 2: Speed Open-loop Motor (speed drops under load)
Mode 3: Stepping Mode (incremental motion from current position)
Reliability Testing
Signal Parameters
Documents:
Product Includes:
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