Product Description
AI Arm Servo Motor Kit Imitation Learning Robotic Arm Open Source SO-ARM101 Pro Low-Cost for Hugging Face LeRobot (Assembled)
AI Arm Servo Motor Kit Imitation Learning Robotic Arm Open Source SO-ARM101 Pro Low-Cost for Hugging Face LeRobot (Assembled)Build your own imitation learning robotic arm with the SO-ARM101! Designed for LeRobot and Hugging Face projects, these kits include servo motors, adapter board, and cables. Open-source, low-cost, and DIY-friendly—perfect for robotics enthusiasts and developers. Start prototyping today with our comprehensive resources!
Feature
What's news:
Wiring optimization: Compared to SO-ARM100, SO-ARM101 features improved wiring that prevents disconnection issues previously seen at joint 3. The new wiring design also no longer limits the range of motion of the joints.
Different gear ratios for the leader arm: The leader arm now uses motors with optimized gear ratios, improving performance and eliminating the need for external gearboxes.
New functionality support: The leader arm can now follow the follower arm in real-time, which is crucial for the upcoming reinforcement learning (RL) policy, where a human can intervene and correct the robot’s actions.
Features of SO-ARM 101 Sereies:
Open-source and low-cost: It is an open-source, low-cost robotic arm solution from TheRobotStudio.
Integration with LeRobot: Designed for integration with LeRobot platform which offers PyTorch models, datasets and tools for reinforcement learning and imitation learning for real-world robotics applications (including data collection, simulation, training and deployment).
Abundant learning resources: Provides comprehensive open-source learning resources like assembly and calibration guides, and tutorials for testing, data collection, training and deployment to assist users in quickly getting started and developing robotic applications.
Compatible with Nvidia: Deploy this arm kit with reComputer Mini J4012 Orin NX 16 GB.

Specification
SO-ARM10x Low-Cost AI Arm Kit and Arm Kit Pro | ||||
Type | SO-ARM100 | SO-ARM101 | ||
Arm Kit | Arm Kit Pro | Arm Kit | Arm Kit Pro | |
Leader Arm | 12x (7.4V) 1:345 gear ratio motors for all joints | 12x (12V) 1:345 gear ratio motors for all joints | 1x (7.4V) 1:345 gear ratio motor for No.2 joint | |
2x (7.4V) 1:191 gear ratio motors for No.1 and No.3 joints | ||||
3x (7.4V) 1:147 gear ratio motors for No.4, No.5 joints and the No.6 gripper | ||||
Follower Arm | Same as SO-ARM100 | Same as SO-ARM100 | ||
Power Supply | 5.5mm*2.1mm DC 5V4A | 5.5mm*2.1mm DC 12V2A | 5.5mm*2.1mm DC 5V3A | 5.5mm*2.1mm DC 12V2A For Follower Arm |
5.5mm*2.1mm DC 5V3A For Leader Arm | ||||
Angle sensor | 12-bit magnetic encoder | |||
Recommended Operating Temperature Range | 0℃~40℃ | |||
Communication Method | UART | |||
Control Method | PC |
What's news
Wiring optimization: Compared to SO-ARM100, SO-ARM101 features improved wiring that prevents disconnection issues previously seen at joint 3. The new wiring design also no longer limits the range of motion of the joints.
Different gear ratios for the leader arm: The leader arm now uses motors with optimized gear ratios, improving performance and eliminating the need for external gearboxes.
New functionality support: The leader arm can now follow the follower arm in real-time, which is crucial for the upcoming reinforcement learning (RL) policy, where a human can intervene and correct the robot's actions.
Disclaimer
Seeed Studio only provides the hardware required for LeRobot.
For SO-ARM10x hardware , please refer to: TheRoboStudio for synchronized updates.
For software and tutorials, please follow: Huggingface/Lerobot.
Please promptly report the issue to the LeRobot platform or the LeRobot Discord channel.
Hardware Overview

Application
Imitation learning and Reinforcement learning
The LeRobot framework is compatible with the SO-ARM10x robotic arm. It provides complete data collection, training, and deployment for teaching the robotic arm, and also has a comprehensive simulation platform. On the Nvidia Jetson edge device, it's easy and quick to train a customized robotic arm to complete grasping and placing tasks. For detailed tutorials, please refer to: LeRobot - NVIDIA Jetson AI Lab

Documents
STS3215 Servo Motor Datasheet
Finedtune 3D printed parts files
Original SO-ARM100 3D printed parts
Purchase after March 03 2025, please see: Servo Adaptor Board for Seeed Studio XIAO Datasheet
Purchase before March 03 2025, please see: Serial Bus Servo Drive Board DataSheet
If you are using reComputer J301, visit data sheet
If you are using reComputer J401, visit data sheet
Part List
AssembledBlackLeaderArm | x1 |
Assembled White Leader Arm | x1 |
32*32mmUSBCamera | x1 |
Servo Driver Board for LeRobot | x2 |
5V Power Supply Cable (Multiple head) | x1 |
12V Power Supply Cable (Multiple head) | x1 |
USB-C Cable | x2 |
DC Power Pigtail Cable | x2 |
Screwdriver | x1 |
Clamp | x4 |
Mouse mat | x1 |

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Condition
Brand New
Shipping
This item is shipped directly from our supplier in China with tracking.