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| 2015-07-10 10:38:39 -0500 | commented answer | Hokuyo laser getID failed. How to fix it? Yes I did whatever you said. It worked fine till : crw-rw-rw- 1 root dialout 166, 0 Jun 15 11:17 /dev/ttyACM0 then trying to get ID i was getting error. Somehow after taking a break and restarting everything. It worked. Thanks for your help. |
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| 2015-07-08 17:02:32 -0500 | asked a question | Hokuyo laser getID failed. How to fix it? While running the rosrun hokuyo_node, I get the error getID failed: timeout reached (in hokuyo::laser::laserReadLine) how to fix it. I followed the Hokuyo tutorials. And I have given it permission. |
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| 2015-06-07 01:55:09 -0500 | answered a question | what is a frame? In simplest terms, if you can think in terms of physics. It just means frame of reference on which you base your odometry or robot parts. A frame can just be though of as an origin in coordinate space and how all your joints/parts are attached to it. |
| 2015-06-07 01:55:05 -0500 | asked a question | youbot hello world example arm not moving. I have ROS Hydro. I installed the ROS wrapper for youbot, and when I run the hello world example, the base moves but the arm doesn't. I am trying to simulate it in gazebo. I did: roslaunch youbot_gazebo_robot youbot.launch then I did: rosrun youbot_ros_hello_world youbot_ros_hello_world I am also having error loading the urdf material but I don't think that is the reason. I have tried giving: rostopic pub /arm_1/arm_controller/position_command brics_actuator/JointPositions '{positions:[ {joint_uri: arm_joint_1, unit: rad, value: 1.0}]}' but the arm doesn't move. My output looks like this: SUMMARYPARAMETERS * /arm_1/arm_controller/constraints/arm_joint_1/goal * /arm_1/arm_controller/constraints/arm_joint_2/goal * /arm_1/arm_controller/constraints/arm_joint_3/goal * /arm_1/arm_controller/constraints/arm_joint_4/goal * /arm_1/arm_controller/constraints/arm_joint_5/goal * /arm_1/arm_controller/constraints/goal_time * /arm_1/arm_controller/gains/arm_joint_1/d * /arm_1/arm_controller/gains/arm_joint_1/i * /arm_1/arm_controller/gains/arm_joint_1/p * /arm_1/arm_controller/gains/arm_joint_2/d * /arm_1/arm_controller/gains/arm_joint_2/i * /arm_1/arm_controller/gains/arm_joint_2/p * /arm_1/arm_controller/gains/arm_joint_3/d * /arm_1/arm_controller/gains/arm_joint_3/i * /arm_1/arm_controller/gains/arm_joint_3/p * /arm_1/arm_controller/gains/arm_joint_4/d * /arm_1/arm_controller/gains/arm_joint_4/i * /arm_1/arm_controller/gains/arm_joint_4/p * /arm_1/arm_controller/gains/arm_joint_5/d * /arm_1/arm_controller/gains/arm_joint_5/i * /arm_1/arm_controller/gains/arm_joint_5/p * /arm_1/arm_controller/joints * /arm_1/arm_controller/type * /arm_1/gripper_controller/gains/gripper_finger_joint_l/d * /arm_1/gripper_controller/gains/gripper_finger_joint_l/p * /arm_1/gripper_controller/gains/gripper_finger_joint_r/d * /arm_1/gripper_controller/gains/gripper_finger_joint_r/p * /arm_1/gripper_controller/joints * /arm_1/gripper_controller/type * /gazebo_ros_control/pid_gains/caster_joint_bl/d * /gazebo_ros_control/pid_gains/caster_joint_bl/i * /gazebo_ros_control/pid_gains/caster_joint_bl/p * /gazebo_ros_control/pid_gains/caster_joint_br/d * /gazebo_ros_control/pid_gains/caster_joint_br/i * /gazebo_ros_control/pid_gains/caster_joint_br/p * /gazebo_ros_control/pid_gains/caster_joint_fl/d * /gazebo_ros_control/pid_gains/caster_joint_fl/i * /gazebo_ros_control/pid_gains/caster_joint_fl/p * /gazebo_ros_control/pid_gains/caster_joint_fr/d * /gazebo_ros_control/pid_gains/caster_joint_fr/i * /gazebo_ros_control/pid_gains/caster_joint_fr/p * /gazebo_ros_control/pid_gains/wheel_joint_bl/d * /gazebo_ros_control/pid_gains/wheel_joint_bl/i * /gazebo_ros_control/pid_gains/wheel_joint_bl/p * /gazebo_ros_control/pid_gains/wheel_joint_br/d * /gazebo_ros_control/pid_gains/wheel_joint_br/i * /gazebo_ros_control/pid_gains/wheel_joint_br/p * /gazebo_ros_control/pid_gains/wheel_joint_fl/d * /gazebo_ros_control/pid_gains/wheel_joint_fl/i * /gazebo_ros_control/pid_gains/wheel_joint_fl/p * /gazebo_ros_control/pid_gains/wheel_joint_fr/d * /gazebo_ros_control/pid_gains/wheel_joint_fr/i * /gazebo_ros_control/pid_gains/wheel_joint_fr/p * /joint_state_controller/publish_rate * /joint_state_controller/type * /robot_description * /robot_state_publisher/publish_frequency * /rosdistro * /rosversion * /use_sim_time * /world_description NODES / arm_1_arm_controller_spawner (controller_manager/spawner) arm_1_gripper_controller_spawner (controller_manager/spawner) gazebo (gazebo_ros/gzserver) gazebo_gui (gazebo_ros/gzclient) gazebo_world_model (gazebo_ros/spawn_model) joint_state_controller_spawner (controller_manager/spawner) robot_state_publisher (robot_state_publisher/robot_state_publisher) spawn_robot (gazebo_ros/spawn_model) auto-starting new master process[master]: started with pid [8103] ROS_MASTER_URI=http://localhost:11311 setting /run_id to e490f68e-0cb7-11e5-98e5-88532e128978 process[rosout-1]: started with pid [8116] started core service [/rosout] process[gazebo-2]: started with pid [8130] process[gazebo_gui-3]: started with pid [8136] process[gazebo_world_model-4]: started with pid [8144] Gazebo multi-robot simulator, version 1.9.6 Copyright (C) 2014 Open Source Robotics Foundation. Released under the Apache 2 License. http://gazebosim.org Gazebo multi-robot simulator, version 1.9.6 Copyright (C) 2014 Open Source Robotics Foundation. Released under the Apache 2 License. http://gazebosim.org process[spawn_robot-5]: started with pid [8147] process[joint_state_controller_spawner-6]: started with pid [8150] Msg Waiting for master.process[arm_1_arm_controller_spawner-7]: started with pid [8155] process[arm_1_gripper_controller_spawner-8]: started with pid [8176] spawn_model script started Msg Waiting for master Msg Connected to gazebo master @ http://127.0.0 ... |
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