WSAL24702 – ST3025 Servo/en
Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.
Summary
The ST3025 is a dual-axis serial bus servo featuring a brushless motor, a 360° magnetic encoder, and high torque. It suits robotics projects requiring closed-loop control.
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Technical overview
- Supply voltage: 6–12.6 V (typical 12 V).
- Rotation angle: 360° in servo mode; continuous rotation possible in motor mode.
- Encoder resolution: 0.088° (360°/4096) via the 360° magnetic encoder.
- Baud rate: default 1 Mbps, configurable from 38,400 bps up to 1 Mbps.
- ID range: 0–253; factory default ID is 1.
- Locked-rotor torque: 40 kg·cm at 12 V; KT value 9 kg·cm/A.
- Currents: no-load 380 mA, rated 1.5 A, locked-rotor 4.4 A.
- Dimensions: 40 × 20 × 40 mm; housing CNC-machined metal.
- Two connectors per servo allow daisy-chaining multiple servos on one bus.
- Feedback data: position, load, speed, input voltage, current, temperature.
Notes and version constraints
- The source contains no explicit command lines or API calls; therefore the 'commands' field remains empty.
- Configuring baud rate and mode requires access to the firmware or driver board — details are missing from the source.
- Servo ID changes must be saved before power-off; the EPROM area must be unlocked, otherwise changes are lost after restart.
- When using custom circuits, refer to the drive circuit schematic; full circuit data is not included in the source.
- The number of simultaneous servos depends on available board power; the 'up to 253' figure is theoretical and assumes sufficient power supply.
Source and revision record
- ST3025 Servo - Waveshare Wiki
- Source revision: 111162
- Captured: 2026-09-05T02:44:09+00:00
- SHA-256:
d9a12ed7e7650c36e9b5b868b3c0c8803332769e70430ceedcd21735d5db9f6a