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Intermediate build

How to build Seeed reBot-DevArm

7-DoF desktop robot arm · Intermediate

Build Seeed's reBot Arm B601, an OSHWA-certified open arm with Damiao or Robstride motors and LeRobot, ROS 1/2 and Isaac Sim support. Kits or a full BOM.

Start the buildProject files
Difficulty
Intermediate

Some soldering, calibration and Linux comfort needed.

Build time
2–4 weekends

Our estimate, part-time

Parts cost
Not published

Price the BOM yourself

Degrees of freedom
7

CERN-OHL-W-2.0

What is Seeed reBot-DevArm?

reBot-DevArm is Seeed Studio's open-source arm for embodied-AI developers, OSHWA-certified as CN000024. The B601 comes in a Damiao-motor version (B601-DM) and a Robstride version (B601-RS), built from sheet metal and printed parts.

Seeed publishes the blueprints, a screw-level BOM with reference prices, assembly videos, the Motorbridge Python SDK, ROS 1/2 integration, Isaac Sim models and LeRobot support. There's even a MuJoCo twin you can try in the browser, and kits range from motors-only to fully assembled.

Seeed reBot-DevArm specifications

Motor options
Damiao (DM) or Robstride (RS)
Structure
Sheet metal + printed
Software
Python SDK, ROS 1/2, Isaac Sim, LeRobot, MuJoCo
License
CERN-OHL-W-2.0 / Apache-2.0
Certification
OSHWA CN000024

Figures as published by the project. See Sources below.

Bill of materials

PartQtyNotes
Joint motors—Per the B601 BOM
Gripper—
Sheet-metal parts—
Printed parts—
USB-CAN adapter and harness—
Where's the full bill of materials?

The full BOM, with exact quantities and vendors, lives in the project's own files. Prices change often, so treat Not published as a ballpark. Start at the project repository.

Tools you'll need

  • Hex keys
  • Torque screwdriver
  • Linux PC

Step-by-step build overview

Electronics & wiring overview

All the joint motors share a CAN bus to the USB-CAN adapter. Motorbridge speaks several vendors' motor protocols.

DC power supplypower sourceLaptop / PChigh-level controlEncoderssensingMicrocontrollerreal-time controllerMotor driverdrivers / busRobstride actuators7 joints / motors
PowerData / commandsSensor feedbackOverview only. Follow the project's own schematic for pinouts and voltages.

Software

LeRobotROS 2NVIDIA IsaacPython

Motorbridge SDK, ROS 2 kinematics and gravity compensation, Isaac Sim USD models and LeRobot.

Tips from the bench

  • ☕ Check reach in the simulator before buying.
  • ☕ Contact Seeed about commercial use.

Seeed reBot-DevArm FAQ

Is it fully open?

Yes. The hardware is CERN-OHL-W-2.0, the software is Apache-2.0, and it's OSHWA-certified.

What's the difference between DM and RS?

The motor supplier: Damiao or Robstride.

Does it work with LeRobot?

Yes.

Sources

Written by Bots n' Beans from the project's own documentation. Check the sources for the latest revision before you buy parts.

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