Spawning a robot arm with desired joint angles

asked 2016-06-09 09:19:12 -0600

167 ●5 ●8 ●14

updated 2016-06-10 02:11:10 -0600

I am trying to spawn a Kinova Mico arm in a gazebo simulation and Rviz. It spawns with all the joints at a value of 0. This means that they spawn in collision state, shown below. Both in rviz and they spawn in the same state. image description

I am trying to execute movement from the real hardware arm, so rotating the joints in the URDF model is not a solution to solving this problem. How can I spawn the robot with rotated joints?

EDIT:

Added the suggested answer but didn't fix anything.

  <node name="urdf_spawner" pkg="gazebo_ros" type="spawn_model"
    args="-urdf 
    -model mico 
    -param robot_description 
    -J mico_joint_1 0
    -J mico_joint_2 1.5708
    -J mico_joint_3 1.5708
    -J mico_joint_4 0
    -J mico_joint 5 0
    -J mico_joint_6 0
    -z 1.0" 
    respawn="false" output="screen"/>

I also get this message:

[INFO] [WallTime: 1465542497.231790] [0.000000] temporary hack to **fix** the -J joint position option (issue #93), sleeping for 1 second to avoid race condition.

edit retag flag offensive close merge delete

add a comment

1

answered 2016-06-10 06:17:11 -0600

Laurens Verhulst

167 ●5 ●8 ●14

updated 2016-06-10 06:17:30 -0600

Ok found the answer here on github. It was indeed -J joint_name joint_angle. However, you have to wait til all the controllers are initiated and then execute the spawn command. It's a work-around apparently.