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Can't get robot arm's current pose with a error (Failed to fetch current robot state)

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Hello, everyone. Thank for looking this thread. I want to get end-effector(link_t)'s pose using `moveit::planning_interface::MoveGroupInterface::getCurrentPose()`. But, I could not get end-effector's pose and orientation like below. header: seq: 0 stamp: 74.419000000 frame_id: world pose: position: x: 0 y: 0 z: 0 orientation: x: 0 y: 0 z: 0 w: 1 I got following error (Failed to fetch current robot state) robot@robot-NG:~$ rosrun sia20_control sequential_ik_solver Is start spinner? true [ INFO] [1559035400.947083805]: Loading robot model 'sia20'... [ WARN] [1559035401.013390105]: Kinematics solver doesn't support #attempts anymore, but only a timeout. Please remove the parameter '/robot_description_kinematics/sia20_arm/kinematics_solver_attempts' from your configuration. [ INFO] [1559035402.311004825, 73.418000000]: Ready to take commands for planning group sia20_arm. end effector name is [ INFO] [1559035403.314437642, 74.418000000]: Didn't received robot state (joint angles) with recent timestamp within 1 seconds. Check clock synchronization if your are running ROS across multiple machines! [ERROR] [1559035403.314531291, 74.419000000]: Failed to fetch current robot state header: seq: 0 stamp: 74.419000000 frame_id: world pose: position: x: 0 y: 0 z: 0 orientation: x: 0 y: 0 z: 0 w: 1 [ INFO] [1559035404.314786192, 75.416000000]: Didn't received robot state (joint angles) with recent timestamp within 1 seconds. Check clock synchronization if your are running ROS across multiple machines! [ERROR] [1559035404.314857179, 75.417000000]: Failed to fetch current robot state header: seq: 0 stamp: 75.417000000 frame_id: world pose: position: x: 0 y: 0 z: 0 orientation: x: 0 y: 0 z: 0 w: 1 When I run following program. #include #include #include #include #include int main(int argc, char* argv[]) { ros::init(argc, argv, "sequential_ik_solver"); ros::NodeHandle node_handle; ros::AsyncSpinner spinner(3); spinner.start(); std::cout << "Is start spinner? " << std::boolalpha << spinner.canStart() << std::endl; const std::string PLANNING_GROUP = "panda_arm"; moveit::planning_interface::MoveGroupInterface move_group(PLANNING_GROUP); //move_group.setEndEffectorLink("link_t"); std::cout << "end effector name is " << move_group.getEndEffector() << std::endl; while (ros::ok()) { std::cout << move_group.getCurrentPose() << std::endl; } return 0; } I'm glad if you know how to solve this problem it or come up with the cause, let me know it. Thanks in advance. [Additional information] - [source code](https://github.com/harumo11/sia20/tree/master/sia20_moveit_config) - ROS distro : melodic If you need additional information, feel free to tell me it.

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