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Please note: This product is not a finished robotic arm , but rather a DIY kit of servos, control boards, cables, and mounting hardware. The kit does not include 3D printed parts or a camera . Installation requires assembly, configuration, and calibration.
Product description: SO-ARM101 Pro Servo Motor Kit - servo kit for building a LeRobot robot arm - Seeedstudio 114993667
The SO-ARM101 Pro Servo Motor Kit allows you to build a system consisting of a leader arm and a follower arm . The operator moves the control arm, and the actuator arm replicates the movements, allowing you to record demonstrations needed for training robotic models. The SO-ARM101's design has been optimized compared to the SO-ARM100. Improved cable routing reduces the risk of disconnection at the third joint and maintains range of motion, while the leader arm's variable servo ratios eliminate the need for external gears. The project is compatible with the LeRobot ecosystem, which includes tools for teleoperation, calibration, dataset storage, model training, and implementation on a live robot.
SO-ARM101 Pro Servo Motor Kit - servo kit for building a LeRobot robot arm - Seeedstudio 114993667.
The kit enables the construction of leader and follower arms, which are used to collect data and train AI models using the learning-by-imitation method.
Main features of the SO-ARM101 Pro kit
- 12 STS3215 servos : a complete set of drives for building a 6-axis leader arm and a 6-axis follower arm
- Three steering arm ratios : appropriately selected servos with ratios of 1:345, 1:191 and 1:147 improve the reproduction of the movement of individual joints
- 12V servos in the actuator arm : six drives with a ratio of 1:345 intended for the follower construction
- 12-bit magnetic encoder : enables precise measurement of the servo shaft position
- UART Communication : Allows you to control the drives via the included control boards
- Integration with Hugging Face LeRobot : supports teleoperation, data collection, model training and testing on a physical robot
- Open design : access to documentation, 3D model files, assembly instructions, and community resources
- Improved cable routing : reduces the risk of cable disconnection at the third joint and does not restrict arm movement
- Operator Intervention Capability : The leader arm can mirror the position of the follower arm, supporting reinforcement learning and robot correction experiments
- Self-assembly kit : intended for people who want to learn about mechanical construction, drive configuration and arm calibration process
SO-ARM101 Pro arm cooperation with reComputer
The kit can be paired with the reComputer Mini J4012 with a Jetson Orin NX 16GB module , which can perform local data processing, train selected models, and control the robot without the need for an external cloud. The combination of the SO-ARM101 arm, the LeRobot platform, and the reComputer computer creates an environment designed for AI robotics learning, research, and automation testing . Software requirements depend on the LeRobot environment version and the operating system installed on the Jetson platform.
Included control boards enable communication with the servos and integration of the arm with the computer and LeRobot environment.
The SO-ARM101 utilizes a redesigned cable routing system that reduces the risk of cable disconnection and does not restrict the joints' range of motion.
SO-ARM101 Pro components for 3D printing yourself
The SO-ARM101 Pro Servo Motor Kit is a set of electronic and drive components , not a complete, pre-assembled arm. The package does not include printed arm components, joint housings, base, or other mechanical components that make up the arm structure. These must be made on a 3D printer or purchased separately. The manufacturer provides ready-made model files for the leader and follower arms . Example printing parameters include PLA+ material, a 0.4mm nozzle with a 0.2mm layer thickness, or a 0.6mm nozzle with a 0.4mm layer thickness, and a 15% infill. Before beginning assembly, verify the variant of the downloaded models and ensure they are suitable for the SO-ARM101 design.
Technical Specifications of the SO-ARM101 Pro Servo Motor Kit
- Number of arms that can be built: 2
- Arm type: leader and follower
- Number of axes of one arm: 6
- Total number of servos: 12
- Servo model: STS3215
- Leader arm servo for joint no. 2: 1 pc., 7.4 V, gear ratio 1:345
- Leader arm servos for joints 1 and 3: 2 pcs., 7.4 V, gear ratio 1:191
- Leader arm servos for joints 4 and 5 and gripper 6: 3 pcs., 7.4 V, gear ratio 1:147
- Follower arm servos: 6 pcs., 12 V, gear ratio 1:345
- Position sensor: 12-bit magnetic encoder
- Communication method: UART
- Control method: PC
- Recommended operating temperature range: 0°C to 40°C
- Recommended follower arm power supply: 12 V / 2 A
- Leader arm power supply: 5 V / 3 A
- Number of control boards: 2
- Supported Environment: Hugging Face LeRobot
- Compatible computing platform: including reComputer Mini J4012 with NVIDIA Jetson Orin NX 16 GB
Elements included in the set.
SO-ARM101 Pro Kit Contents
- STS3215 7.4V servo with a gear ratio of 1:345 - 1 pc.
- STS3215 7.4V servo with a gear ratio of 1:191 - 2 pcs.
- STS3215 7.4V servo with a gear ratio of 1:147 - 3 pcs.
- STS3215 12V servo with a gear ratio of 1:345 - 6 pcs.
- Servo control board for LeRobot - 2 pcs.
- Mounting pin - 8 pcs.
- Screw - 8 pcs.
- Splitter power cable 5V - 1 pc.
- Splitter power cable 12V - 1 pc.
- USB Type-C cable - 2 pcs.
- DC power cable with exposed wires - 2 pcs.
- Mounting clip - 4 pcs.
The kit does not include printed structural parts, a camera or a ready-assembled arm.
