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see the [UPDATE] part in the question for the answer

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see the [UPDATE] part in the question for the answer

When I start up the gazebo world with pr2, there is some warnings:

[ WARN] [1314971961.560814557, 0.001000000]: urdf2gazebo: link(r_gripper_tool_frame) has no inertia, 1 children link ignored.
[ WARN] [1314971961.560901210, 0.001000000]: urdf2gazebo: link(r_gripper_tool_frame) has no inertia, 1 children joint ignored.
[ WARN] [1314971961.560934768, 0.001000000]: urdf2gazebo: link(r_gripper_tool_frame) has no inertia, parent joint(r_gripper_tool_joint) is ignored.
[ WARN] [1314971961.560967559, 0.001000000]: urdf2gazebo: link(r_gripper_tool_frame) has no inertia, not modeled in gazebo.

I added the intertia property to r_gripper_tool_frame which was originally defined in file "pr2_description/urdf/gripper.urdf.xacro" and it worked.

But i'm still wondering if there is detailed gazebo plugin XML reference.

[UPDATE]

When I start up the gazebo world with pr2, there is some warnings:

[ WARN] [1314971961.560814557, 0.001000000]: urdf2gazebo: link(r_gripper_tool_frame) has no inertia, 1 children link ignored.
[ WARN] [1314971961.560901210, 0.001000000]: urdf2gazebo: link(r_gripper_tool_frame) has no inertia, 1 children joint ignored.
[ WARN] [1314971961.560934768, 0.001000000]: urdf2gazebo: link(r_gripper_tool_frame) has no inertia, parent joint(r_gripper_tool_joint) is ignored.
[ WARN] [1314971961.560967559, 0.001000000]: urdf2gazebo: link(r_gripper_tool_frame) has no inertia, not modeled in gazebo.

I added the intertia property to r_gripper_tool_frame which was originally defined in file "pr2_description/urdf/gripper.urdf.xacro" and it worked.

But i'm still wondering if there is detailed gazebo plugin XML reference.