Feetech SCS15 7.4V 15kg.cm TTL Serial Bus Robot Servo

The Feetech SCS15 is a TTL serial bus robot servo for robot arms, hexapods, humanoid joints and wheel or track drives. It delivers 15.6kg.cm of stall torque at 7.4V and reports position, speed, load, input voltage and temperature back over the same bus that carries its commands.

Key features

• Metal gears and ball bearings in a PA case
• 4–8.4V operating range, so it runs directly on a 2S LiPo or a 6–7.4V regulated supply
• Servo mode with 1024-step position control, or motor mode for continuous rotation
• Daisy-chained bus at 38400bps to 1Mbps, each servo on its own ID (0–253)
• 0.156 sec/60° at 7.4V with 5.2kg.cm rated torque

Specifications

• Stall torque: 15.6kg.cm at 7.4V
• Rated torque: 5.2kg.cm at 7.4V
• Speed: 0.156 sec/60° at 7.4V
• Operating voltage: 4–8.4V
• Stall current: 2.5A at 7.4V
• No-load current: 270mA at 7.4V
• Position resolution: 1024 steps (0–1023)
• Protocol: Half-duplex asynchronous serial (TTL)
• Baud rate: 38400bps–1Mbps
• Gears: Metal
• Bearings: Ball bearings
• Case: PA (nylon)
• Output spline: 25T, 5.9mm OD
• Horn: POM plastic
• Dimensions: 40.2 x 20.2 x 40mm
• Weight: 58.2g (±1g)
• Lead length: 150mm
• Operating temperature: -15 to 70°C

A hexapod or arm with many SCS15s can draw several amps when joints stall together, so size the bus power supply for 2.5A of stall current per servo.