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Trossen Robotis - WidowX 250 Robot Arm 6DOF

Availability: Available to Backorder

Exc. VAT: £2,207.60 Inc. VAT: £2,649.12



Quick overview

The WidowX 250 Robot Arm 6DOF belongs to a new family of arms from Interbotix featuring the DYNAMIXEL X-Series Smart Servo Motors.

The WidowX 250 Robot Arm 6DOF belongs to a new family of arms from Interbotix featuring the DYNAMIXEL X-Series Smart Servo Motors. The X-Series actuators offer higher torque, more efficient heat dissipation and better durability all at a smaller form factor over previous DYNAMIXEL servos. The DYNAMIXEL XM-430-W350 & DYNAMIXEL XL430-W250 servos offer high resolution of 4096 positions and user definable PID parameters. Temperature monitoring, positional feedback, as well as voltage levels, load, and compliance settings are user accessible as well. At the heart of the WidowX 250 6DOF is the Robotis DYNAMIXEL U2D2 which enables easy access to DYNAMIXEL Wizard software as well as ROS. The WidowX 250 offers 6 degree of freedom and a full 360 degree of rotation.

Hardware Overview
ROS Packages
What is a Smart Servo?

Software Control

ROS Serial Communication DYNAMIXEL SDK
Overview Packages for Ubuntu 16.04 & ROS Kinetic / Ubuntu 18.04 & ROS Melodic Contains Meshes, URDF, Inertial values, driver node as well as Gazebo config / Moveit config and examples / demos.
The Interbotix Serial Firmware allows users who wish to use an onboard IK engine to operate a 5DOF arm through the use of serial over USB. The ROBOTIS Dynamixel SDK is a software development kit that provides Dynamixel control functions using packet communication.
Operating System Linux Windows / MacOS / Linux Windows / MacOS / Linux
Languages C++, Python, or any other ROS compatable languages Any language which can communicate via serial over USB C, C++, C#, Python, Java, MATLAB, LabVIEW and ROS.
Controller DYNAMIXEL U2D2 OpenCM9.04c DYNAMIXEL U2D2
Demos Examples include:

  • MoveIt!
  • Rviz Gazebo Simulation
  • Physical Robot Control
  • Puppet Control
  • Diagnostics & Data Recording
  • PS3/PS4 Control
A Windows Demo is provided allowing for control of any standard X-Series 5DOF arm. Tools are provided for users to become familiar with the Interbotix Serial Protocol Robotis provides sample code in many languages for users to get started
Kinematics Engine Northwestern Illinois Kinematics Library Interbotix 5DOF IK Engine None

Built with Industry Leading Smart Servos

The DYNAMIXEL X-Series smart servos offer features that would normally only be found on industrial level motors for a fraction of the price.

Addressable - All servos have unique IDs allowing users to easily communicate with individual servos or groups of servos. The Shadow ID feature also allows for easy control of a second servo in dual servo joints.

Daisy Chain - DYNAMIXEL servos are connected in a daisy chain (each servo plugged into the next in series) making them extremely scalable and easy to maintain.

Servo Management Software - DYNAMIXEL Wizard 2.0 allows users to configure register settings such as PID gains, Control Modes (position, velocity, current, or PWM) and others. The software also provides tools for firmware updates, diagnostics, configuration and testing, data plotting, generating & monitoring DYNAMIXEL packets, and more.

Trajectory Smoothing - Smart servos have multiple registers for setting velocity & acceleration limits, PID gains, and more for fine tuning smooth joint motions.

Low Level Libraries Provided - DYNAMIXEL servos have libraries that abstract away the serial communication layer allowing developers to concentrate their time on higher level code.

The WidowX 250 6DOF comes fully assembled and tested and is constructed from extremely rigid 20mm x 20mm extruded aluminum and aluminum construction. The arm sits on an industrial grade,slewing bearing for added stability and accuracy. The electronics are covered with a transparent acrylic shield to keep the electronics free from debris as well as with impact from the arm itself.


The X-Series gripper carriages are designed for users to quickly and easily change the gripper fingers for different projects. CAD files for the gripper are available for download, if you can design it and 3D print the customization is endless. Included with the arm are sticker backed foam and sorbothane rubber both increase gripping strength while relieving stress on the gripper servo.

ROS Packages and Support

ROS packages for Kinetic and Melodic on Ubuntu Linux 16.04 and 18.04 make it easy to get started with the WidowX 250 arm. Packages include full meshes and URDFs (including accurate inertial models for the links), driver node that controls the physical robot arm and publishes joint states as well as gazebo and moveit support. Examples are also included to show users how the core packages work.


All of the X-Series arms are constructed using extremely ridged, lightweight T-slot extruded aluminum and aluminum brackets. All of the X-Series Arms come with a 90 degree elbow design allowing for a greater range of movement and the ability to fold completely on itself.


Each of the X-Series arms* features an industrial quality, high grade slewing bearing base as the central mounting point. The bearing ensures maximum rigidity and accuracy and takes all strain of the base servo increasing the longevity of the arms.

* Pincher 100 comes with roller bearing base

Product Features:

  • XM430-W350 & XL430-W250 Servos
  • Industrial Bearing Base
  • Aluminum Construction
  • U2D2 for Onboard Processing
  • Gripper with Interchangeable Fingers
  • 6 DOF
  • Includes:

  • 7x XM430-W350 Actuators
  • 2x XL430-W250 Actuators
  • 1x CM9.04C
  • 1x 12v5a Power Supply
  • 1x USB2 Micro Cable
  • WidowX 250 Hardware & Frames
  • Extra Gripper Foam / Rubber
  • Drivers / Extra Hardware
  • Base Mount Hardware
  • WidowX 250 Arm
    Degrees of Freedom 6
    Reach 650mm
    Total Span 1300mm
    Working Payload 250g
    Total Servos
    Wrist Rotate Yes

    WidowX 250 Reach

    XM430 DYNAMIXEL servos support up to 360 degrees of rotation, which results in an extraordinary range of motion.

    The WidowX 250 6DOF Robot Arm has a 65cm horizontal reach from center of the base to gripper with a total span of 130cm. The working payload for the WidowX 250 6DOF arm is 250g. Working payload is the weight in which the arm should not exceed under normal working circumstances and is measured by the arm's ability to repeatedly lift an object at roughly half extension without failure. While the WidowX 250 can lift more than 250g, we do not recommend payloads over this number.

    Mounting Hardware

    The base comes with mounting thumb screws to secure the arm easily to most any surface, wood screws are also an option for a more permanent mounting solution.

    Manufacturer part No: KIT-WXA250-6DOF