Trossen Robotics ViperX 300

Trossen's low-cost research robot arm, used as the follower arm in the original ALOHA system.

ViperX 300 is a small research-and-education robot arm from the U.S. company Trossen Robotics (part of its Interbotix X series), driven by Dynamixel servos. Per Trossen's listing, the 300 S version has 6 degrees of freedom, a 750 mm reach, a 750 g payload (about three times that of the related WidowX 250), and repeats position within 1 mm. It's inexpensive, can be controlled directly through ROS, and has become the hardware base for many imitation-learning projects: Stanford's 2023 ALOHA bimanual teleoperation system used two ViperX 300 arms as the followers and two WidowX 250 arms as the leaders, and the ACT algorithm was first validated on exactly this hardware. Trossen's site shows the standard 300 S as discontinued, with a dedicated ALOHA-specific version now offered instead.

ExampleOn the ALOHA platform, an operator moves the WidowX leader arms by hand, and the two ViperX 300 arms mirror the motion in real time to complete fine tasks like threading a zip tie or inserting a battery.

Also called

ViperX, ViperX 300 S, ViperX 300 6DOF

Related

ALOHA · Trossen Robotics WidowX 250 · Trossen Robotics · ROBOTIS Dynamixel Servo · Action Chunking with Transformers · Leader-Follower Teleoperation

Sources

Trossen Robotics: ViperX 300 S

As of

2026-09