Standard Open Arm-100 5DOF - Version 1.3 (MJCF)

Important

Requires MuJoCo 3.1.6 or later.

Overview

This package contains a simplified robot description (MJCF) of the Standard Open Arm-100 developed by The Robot Studio. It is derived from the publicly available URDF description.

URDF → MJCF derivation steps

  1. Added <mujoco><compiler discardvisual="false" strippath="false"/></mujoco> to the URDFs <robot> element to preserve visual geometries.
  2. Loaded the URDF into MuJoCo and saved it as a corresponding MJCF.
  3. Manually edited the MJCF to extract shared properties into the <default> section.
  4. Edited original meshes: extracted servos into separate files, manually created convex collision meshes for the gripper jaws.
  5. Added extra box-shaped collision geoms to the gripper for additional contact points.
  6. Added an exclude clause to prevent collisions between Base and Rotation_Pitch.
  7. Added approximate joint limits.
  8. Added position-controlled actuators.
  9. Added impratio="10" and cone="elliptic" attributes for improved no-slip behavior.
  10. Created scene.xml to include the robot, along with a textured ground plane, skybox, and haze.

License

This model is released under an Apache-2.0 License.