Feetech HL-3915-C001 12V 14kg.cm Dual-Shaft TTL Serial Bus Servo

The Feetech HL-3915-C001 is a 12V TTL serial bus smart servo that packs 14.2kg.cm of stall torque into a 34 x 20 x 23mm aluminium case, with output shafts on both sides for supporting a bracket across a joint. A 12-bit magnetic encoder gives absolute 360° positioning, suiting robot arms, humanoid joints, grippers and automated mechanisms running from a 3S pack or a 12V supply.

Key features

• Wide 4–14V input with rated performance at 12V

• 12-bit magnetic encoder: 4096 steps across 360° (0.088° resolution)

• Angle servo mode (0–360°), constant-speed motor mode, constant-current mode and multi-turn operation

• Real-time feedback on load, position, speed, input voltage, current and temperature, with overload, overvoltage and overheat protection

• Metal gears (1:320), ball bearings and a coreless motor

Specifications

• Stall torque: 14.2kg.cm at 12V

• Rated load: 4.5kg.cm at 12V

• Speed: 0.1 sec/60° (100 RPM) at 12V

• Input voltage: 4–14V

• Stall current: 1.5A at 12V

• Rated current: 500mA at 12V

• No-load current: 260mA at 12V

• Range: 360° (0–4095), 0.088° resolution

• Protocol: Half-duplex asynchronous serial (TTL)

• Baud rate: 38400bps–1Mbps

• ID range: 0–253

• Gears: Metal, 1:320 ratio

• Motor: Coreless

• Bearings: Ball bearings

• Case: Aluminium

• Output spline: 25T, 4.95mm OD

• Dimensions: 34 x 20 x 23mm

• Weight: 35.8g (±2g)

• Lead length: 150mm or 200mm

• Operating temperature: -10 to 60°C

A 3S LiPo (12.6V fully charged) stays within the 14V limit; a 4S pack does not. Command it with digital packets from a serial bus servo adapter or a half-duplex microcontroller UART.