FEETECH HL-3925 Servo Motor, 12V 25kg Double Shaft Serial Bus, 0–360° Control, Multi-Loop, PID, 38400bps–1Mbps

Overview

The FEETECH HL-3925 Servo Motor (model HL-3925-C001) is a 12V 25kg double shaft constant force serial bus servo designed for robotics and automation. It supports absolute position control from 0–360°, multi-loop operation, and constant force output, with digital packet half duplex asynchronous serial communication and PID control. Typical uses include humanoid robots, robotic arms, exoskeletons, quadrupeds, AGV vehicles, and ARU robots.

Key Features

• Double shaft serial bus servo with constant force output: set target torque at address 44 to maintain the specified torque.
• Operating modes:
  • Mode 0: Angle servo mode (default), absolute position control from 0–360 degrees.
  • Mode 1: Motor constant speed mode, maintains speed without deceleration as load increases.
  • Mode 2: Motor constant current mode, maintains current without decreasing as load increases; can achieve absolute position.
• Multi-Loop Mode: control of positive and negative 7 turns at high accuracy (turn count not saved during power-off; resolution can be expanded to double the number of turns).
• Copper gear train, ball bearings, aluminium case; horn gear spline 25T/OD5.9mm.
• Rated input voltage 9V–12.6V; peak stall torque 25kg.cm@12V; no-load speed 0.182sec/60° (55RPM)@12V.
• Digital Packet communication over half duplex asynchronous serial; ID range 0–253; 38400bps ~ 1 Mbps.
• Resolution 0.088° (360°/4096), neutral position 180°（2048）, clockwise rotation mapping (0→4096).
• Comprehensive feedback: Load, Position, Speed, Input Voltage, Current, Temperature.

Specifications

Applications

• Humanoid Robots
• Robotic Arms
• Exoskeletons
• Quadruped Robots
• AGV Vehicles
• ARU Robots

Manuals

• HL-3925-C001_PRODUCT_SPECIFICATION.pdf

Details