Openarm

OpenArm is a fully open source humanoid robot arm designed for physical AI research and for deployment in contact rich environments. It is robotics hardware rather than software, and it is published with complete CAD files, firmware, control code and simulation tools so that labs can build, modify and reproduce results on the same platform. The current release, OpenArm 2.0, is a bimanual system with CAN FD control, compliant and backdrivable joints, and real time gravity compensation for smooth teleoperation. Bilateral force feedback supports the collection of contact heavy demonstration data, which is the kind of data used to train robot learning models. The site also presents the OpenArm Cell, an evaluation setup that standardizes background, lighting, cameras and arm position, adds a lift mechanism, and includes light curtains and emergency stops so that AI models can be compared automatically and continuously under identical conditions. A lightweight passive teaching device, OpenArm KER, is shown as a forthcoming product that is not part of this release. The arm is aimed at robotics and embodied AI researchers and teams. It can be bought as a DIY kit or as a fully assembled, pre built unit, and documentation, GitHub and YouTube resources are linked for builders. Prices for the kit and the pre built unit are not published on the site, which instead points to a quote or purchase route.