Overview
The FEETECH HL-3612-C001 is a compact TTL serial bus Servo Motor engineered for precise motion control in robotics and mobile platforms. It integrates a coreless motor, metal gear train, aluminum case, and ball bearings with a 25T/OD5.95mm horn spline. Default angle mode provides absolute position control from 0–360°, with a fine resolution of 0.088° (360°/4096). Rated input voltage is 5V–8.4V, delivering a peak stall torque of 15kg.cm@7.4V and a no-load speed of 0.147sec/60° (68RPM)@7.4V. The servo supports constant force output and comprehensive feedback including load, position, speed, input voltage, current, and temperature.
Key Features
- Single shaft TTL serial bus control with digital packet protocol; half duplex asynchronous serial communication
- ID range 0–253; communication speed 38400bps ~ 1 Mbps
- Constant force output: set a target torque and the servo maintains that torque (address 44)
- Operating modes: angle servo (0–360° absolute), motor constant speed, and motor constant current (high-accuracy multi-turn control)
- Metal gears, aluminium case, ball bearings; coreless motor and 1/405 gear ratio
- 360° running degree (when 0~4096) with clockwise direction (0→4096); neutral position 180°(2048); resolution 0.088°
- Horn gear spline 25T/OD5.95mm; connector wire length 15CM
- Environmental ratings: storage -30℃~80℃; operating -20℃~60℃; humidity 65%±10%
Applications
- Humanoid Robots
- Robotic Arms
- Exoskeletons
- Quadruped Robots
- AGV Vehicles
- ARU Robots
Specifications
| Parameter | Value |
|---|---|
| Model | HL-3612-C001 |
| Product Name | 6V 12kg Constant Force Single Shaft TTL Serial Bus Servo |
| Storage Temperature Range | -30℃~80℃ |
| Operating Temperature Range | -20℃~60℃ |
| Temperature Range | 25℃ ±5℃ |
| Humidity Range | 65%±10% |
| Size | A:36mm B:15mm C:29.2mm |
| Weight | 38.2± 1g |
| Gear type | Metal Gear |
| Limit angle | NO limit |
| Bearing | Ball bearings |
| Horn gear spline | 25T/OD5.95mm |
| Gear Ratio | 1/405 |
| The rocker phantom | 0° |
| Case | Aluminium |
| Connector wire | 15CM |
| Motor | Coreless Motor |
| Rated Input Voltage | 5V-8.4V |
| No load speed | 0.147sec/60°(68RPM)@7.4V |
| Runnig current(at no load) | 180mA@7.4V |
| Peak stall torque | 15kg.cm@7.4V |
| Stall current | 1.6A@7.4V |
| Rated Load | 3.75kg. cm@7.4V |
| Rated current | 400mA@7.4V |
| KT | 9.2kg. cm/A |
| Terminal resistance | 2.8 Ω |
| Operating Modes | Mode 0: Angle servo mode (default mode, absolute position controllable from 0-360 degrees). Mode 1: Motor constant speed mode (motor constant speed mode, maintains speed without deceleration as the load increases). Mode 2: Motor constant current mode (motor constant current mode, maintains current without decreasing with increasing load) can achieve absolute position control of positive and negative 7 turns at the highest accuracy, but the number of power failure turns is not saved (the resolution can be expanded, and the number of turns can be doubled). |
| Constant force output | Set the output torque value, the servo can maintain this torque (input the target torque value corresponding to address 44, the servo can maintain this torque) |
| Command signal | Digital Packet |
| Protocol Type | Half Duplex Asynchronous Serial Communication |
| ID range | 0-253 |
| Communication Speed | 38400bps ~ 1 Mbps |
| Control Algorithm | PID |
| Neutral Position | 180°(2048) |
| Running degree | 360° (when 0~4096) |
| Resolution [deg/pulse] | 0.088°(360°/4096) |
| Rotating Direction | Clockwise(0→4096) |
| Feedback | Load, Position,Speed, Input Voltage,Current,Temperature |
Manuals
- HL3612-PRODUCT_SPECIFICATION.pdf
- SC-0090-C001Serial_Communication_Specification.pdf
- HL3612_Product_structure_diagram.pdf
Details



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