FEETECH HL-3620-C001 Servo Motor
FEETECH HL-3620-C001 Servo Motor
The HL-3620-C001 is a 7.4V 20kg.cm double shaft constant force servo configured with a PID control algorithm and an electronic resolution of 0.088° ($360^\circ/4096$) for $360^\circ$ absolute position control. Operating across a 6V–8.4V input range, the unit delivers a peak stall torque of 25.5kg.cm, a rated load of 6.4kg.cm, and a no-load speed of 0.135sec/60° (74RPM) at 8.4V. Technical specifications include a core motor, aluminum casing, copper gears, ball bearings, a 1/275 gear ratio, and a 25T/OD5.9mm horn gear spline. The firmware supports three distinct operating modes (angle servo, constant speed, and constant current), a $\pm7$-turn multi-loop mode, and a programmable constant force torque output. Communication is driven by digital packets over a half-duplex asynchronous serial protocol (38400bps–1Mbps, ID range 0–253), featuring sensor feedback for real-time load, position, speed, voltage, current, and temperature monitoring.
| PRODUCT PARAMETERS | |
| Model | HL-3620-C001 |
| Product Name | 7.4V 20kg.cm 360° Double Shaft Constant Force Servo |
| Storage Temperature Range | -30℃~80℃ |
| Operating Temperature Range | -20℃~60℃ |
| Temperature Range | 25℃ ±5℃ |
| Humidity Range | 65%±10% |
| Size | A: 40.2mm B: 20.2mm C: 40mm |
| Weight | 61.7± 1g |
| Gear type | Copper |
| Limit angle | No limit |
| Bearing | Ball bearings |
| Horn gear spline | 25T/OD5.9mm |
| Gear Ratio | 1/275 |
| The rocker phantom | 0° |
| Case | Aluminium |
| Connector wire | 15CM |
| Motor | Core Motor |
| Rated Input Voltage | 6V-8.4V |
| No load speed | 0.135sec/60°(74RPM)@8.4V |
| Runnig current(at no load) : | 280mA@8.4V |
| Peak stall torque | 25.5kg.cm@8.4V |
| Stall current | 3.3A@8.4V |
| Rated Load | 6.4kg. cm@8.4V |
| Rated current | 850mA@8.4V |
| KT constant | 7.7kg. cm/A |
| Terminal resistance | 2.39 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 |
| Multi-Loop Mode | control of positive and negative 7 turns at the highest accuracy, but the umber 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 |