• SO-ARM101 Robot Arm Servo Motor Kit Pro for LeRobot (Without 3D‑Printed Parts) – Open‑Source, 6‑Axis, UART, 12‑bit Encoder
  • SO-ARM101 Robot Arm Servo Motor Kit Pro for LeRobot (Without 3D‑Printed Parts) – Open‑Source, 6‑Axis, UART, 12‑bit Encoder
  • SO-ARM101 Robot Arm, The SO-ARM101 Kit is an open-source 6-axis robot arm for end-to-end learning, featuring improved wiring, optimized gears, new RL policy, and NVIDIA Robotics Toolkit support.
  • SO-ARM101 Robot Arm, Open-source motor kit for 6-axis robot arm with UART and 12-bit encoder, no 3D-printed parts required.
  • SO-ARM101 Robot Arm, Open-source motor kit for 6-axis robot arm with UART and 12-bit encoder, no 3D-printed parts required.
  • SO-ARM101 Robot Arm, Motor kit includes 6-axis servo with UART and 12-bit encoder; 3D printed parts not included.
  • SO-ARM101 Robot Arm, SO-ARM101 is a low-cost, open-source 6-axis AI arm servo motor kit with UART and 12-bit encoder; motors only, 3D parts sold separately, designed for LeRobot.
  • SO-ARM101 Robot Arm, SO-ARM101 is a 6-axis open-source robot arm kit with UART control, 12-bit encoder servo motors, no 3D-printed parts required.
  • SO-ARM101 Robot Arm, SO-ARM101 is a 6-axis open-source robot arm kit with UART communication, 12-bit encoder servo motors, and no 3D-printed parts.
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SO-ARM101 Robot Arm Servo Motor Kit Pro for LeRobot (Without 3D‑Printed Parts) – Open‑Source, 6‑Axis, UART, 12‑bit Encoder

SO-ARM101 Robot Arm Servo Motor Kit Pro for LeRobot (Without 3D‑Printed Parts) – Open‑Source, 6‑Axis, UART, 12‑bit Encoder

Seeed Studio

$312.00 USD
$312.00 USD
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Overview

SO-ARM101 is a Robot Arm Servo Motor Kit Pro optimized for imitation and reinforcement learning with LeRobot and Hugging Face projects. This open-source, low-cost kit includes servo motors, adapter boards, and cables for a complete leader–follower arm setup. The kit is DIY-friendly and designed for rapid prototyping with abundant resources. Important: the motor kit does not include 3D-printed parts; order the 3D-printed skeleton together if needed. Seeed Studio provides hardware for LeRobot.

Key Features

What’s new in SO-ARM101

  • Wiring optimization: mitigates disconnections previously seen at joint 3 and removes range-of-motion limits.
  • Optimized leader arm gear ratios: improved performance without external gearboxes.
  • New functionality: leader arm can follow the follower arm in real time to support RL policies and human intervention.

SO-ARM10x series highlights

  • Open-source and low-cost solution from TheRobotStudio.
  • Integration with the LeRobot platform (PyTorch-based datasets, models, tools for imitation learning and reinforcement learning).
  • Comprehensive resources: assembly, calibration, testing, data collection, training, and deployment guides.
  • Compatible with Nvidia reComputer Mini J4012 Orin NX 16 GB.
  • 6-axis robotics arms (leader and follower) shown in kit materials.

Specifications

Type SO-ARM101 Arm Kit Pro
Leader Arm motors (7.4V) 1× 1:345 gear ratio (No.2 joint); 2× 1:191 (No.1 & No.3); 3× 1:147 (No.4, No.5 & No.6 gripper)
Follower Arm Same as SO-ARM100 Pro
Power supply (DC 5.5mm*2.1mm) 12V2A for follower arm; 5V4A for leader arm
Angle sensor 12-bit magnetic encoder
Recommended operating temperature 0℃～40℃
Communication method UART
Control method PC

Comparison

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 Pro

Power Supply

5.5mm*2.1mm DC 5V4A

5.5mm*2.1mm DC 12V2A

5.5mm*2.1mm DC 5V4A

5.5mm*2.1mm DC 12V2A For Follower Arm

5.5mm*2.1mm DC 5V4A For Leader Arm

Angle sensor

12-bit magnetic encoder

Recommended Operating Temperature Range

0℃～40℃

Communication Method

UART

Control Method

PC

 

What’s Included

  • 7.4v STS3215 Servo Motor 1:345 gear rate ×1
  • 7.4v STS3215 Servo Motor 1:191 gear rate ×2
  • 7.4v STS3215 Servo Motor 1:145 gear rate ×3
  • 12v STS3215 Servo Motor 1:345 gear rate ×6
  • Servo Adaptor Board for Seeed Studio XIAO ×2
  • Stud ×8
  • Screw ×8
  • 5V Power Supply Cable (Multiple head) × 1
  • 12V Power Supply Cable (Multiple head) ×1
  • USB-C Cable ×2
  • DC Power Pigtail Cable ×2

Applications

  • Imitation learning and reinforcement learning with LeRobot: end-to-end pipelines for data collection, training, simulation, and deployment.
  • Nvidia Jetson edge deployment: efficient training of customized grasp-and-place tasks with reComputer J4012 Orin NX 16 GB.

Details

SO-ARM101 Robot Arm, Open-source 6-axis robotic arm kit compatible with reComputer Mini J4012, supports LeRobot for learning, data collection, simulation, and training; includes QR access to GitHub, Wiki, and 3D printing files.

6-axis robotics arm kit with open-source hardware, compatible with reComputer Mini J4012 Orin NX 16GB. Supports LeRobot on Hugging Face for community resources and imitative reinforcement learning, enabling whole-body coordination. Facilitates data collection, simulation, and training. QR codes provide access to GitHub, Wiki, and 3D printing files for the skeleton.

NVIDIA Jetson Orin NX dev kit with reComputer J40 and SO-ARM101 robot arms shows real-time system and GPU stats on a monitor.

NVIDIA Jetson Orin NX Developer Kit with reComputer J40 and SO-ARM101 robot arms, displaying system stats and GPU usage on monitor.

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