[ROS Q&A] 003 – How to control a Gazebo simulated robot with MoveIt! ? (UR5)

ros-tutorial-cover-lern-how-to-control-a-gazebo-simulated-robot-with-movelt!-ur5

Written by Alberto Ezquerro

21/08/2017

 

In this ROS video tutorial we will show you a quick example of how to control a Gazebo simulated ur5 robotic arm with MoveIt!.

* Get all the ROS code of the video in this link: http://www.rosject.io/l/c3b7cee/

 

Step 1. Create a project in ROS Development Studio(ROSDS)

We can do any ROS development we want easily, without setting up environment locally in ROSDS and that’s the reason why we will use ROSDS for this tutorial. If you haven’t had an account yet. You can create one here for free now. After logging in, let’s begin our journey by clicking on the create new project and call it demo.

Step 2. Clone the universal robot repo

Please open a shell in ROSDS(tools->shell) and type the following command to clone the repo from ROS Industrial

NOTICE: We now put every simulation-related content under simulation_ws

cd ~/simulation_ws/src
git clone https://github.com/ros-industrial/universal_robot.git

NOTICE: Then you can launch the simulation from Simulations->Select Launch file->ur5.launch

Step 3. Generate Moveit config file

Type the following command to start configuration

roslaunch moveit_setup_assistant setup_assistant.launch

Then you can open the graphical tool from tools:

1.Select the xarco file (NOTICE: Use simulation_ws instead of catkin_ws now)

2.Self-Collisions: click generate collision matrix

3.Virtual Joints: click add virtual joint then edit it as the following image.

4.Planning Group: click add group then configure it as the following image. click on add kinetic chain and use base_link as Base Link and tool0 as Tip Link

5.Robot Poses: Add the following poses

6.Skip the end effectors and passive joints to the author information

7. Finish and generate config file: select the folder under simulation_ws

Step 4. Configure the controller

Create a file called controller.yaml under /demo_moveit_config/config directory with the following content

controller_list:
  - name: arm_contoller
    action_ns: "follow_joint_trajectory"
    type: FollowJointTrajectory
    joints: [shoulder_pan_joint, shoulder_lift_joint, elbow_joint, wrist_1_joint, wrist_2_joint, wrist_3_joint]

Create another file called joint_names.yaml under the same directory with the following content

controller_joint_names: [shoulder_pan_joint, shoulder_lift_joint, elbow_joint, wrist_1_joint, wrist_2_joint, wrist_3_joint]

Modify the ur5_moveit_controller_manager.launch file with the following content

<launch>
  <rosparam file="$(find demo_moveit_config)/config/controllers.yaml"/>
  <param name="use_controller_manager" value="false"/>
  <param name="trajectory_execution/execution_duration_monitoring" value="false"/>
  <param name="moveit_controller_manager" value="moveit_simple_controller_manager/MoveItSimpleControllerManager"/>
</launch>

Create a new launch file called demo_planning_execution.launch with the following content

<launch>

  <rosparam command="load" file="$(find myrobot_moveit_config)/config/joint_names.yaml"/>

  <include file="$(find demo_moveit_config)/launch/planning_context.launch" >
    <arg name="load_robot_description" value="true" />
  </include>

  <node name="joint_state_publisher" pkg="joint_state_publisher" type="joint_state_publisher">
    <param name="/use_gui" value="false"/>
    <rosparam param="/source_list">[/joint_states]</rosparam>
  </node>

  <include file="$(find demo_moveit_config)/launch/move_group.launch">
    <arg name="publish_monitored_planning_scene" value="true" />
  </include>

  <include file="$(find demo_moveit_config)/launch/moveit_rviz.launch">
    <arg name="config" value="true"/>
  </include>

</launch>

Now you can launch the controller with the command

roslaunch demo_moveit_config demo_planning_execution.launch

You may also want to resize the window in graphical tool with

wmctrl -r :ACTIVE: -e 0,65,24,1500,550

You can try to do the planning now and execute, you should see the robot arm moving as you planned in moveit!

 

Edit by: Tony Huang

Topics:

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7 Comments

  1. RobotGuy

    There is a mistake in: called demo_planning_execution.launch

    It shouldn’t be “myrobot_moveit_config” but instead “demo_moveit_config”.

    Reply
  2. Paul

    Hello, Thanks a lot for the very great tutorial. There are few mistakes in the files:
    -(controller_list:
    – name: arm_contoller) it should be- name: arm_controller (r is missing from the controller name)

    .-There is a mistake in: called demo_planning_execution.launch

    It shouldn’t be “myrobot_moveit_config” but instead “demo_moveit_config”

    -Create a file called controller.yaml

    It should be controllers.yaml

    Many thanks

    Reply
    • Victoria

      That typo in the arm_controller had me stuck for hours! Thanks so much for leaving that comment!!

      Reply
      • Anonymous

        +1

        Reply
  3. dinesdkumar

    hi, i have an error that says unused args [config] for include of moveit_rviz.launch. does anyone know how to solve this issue. Thank you in advance.

    Reply
    • Aabed Solayman

      “config” in your demo_planning_execution.launch must be changed to rviz_config

      Reply
  4. hari haran

    ‘param’ attribute must be set for non-dictionary values
    XML is
    The traceback for the exception was written to the log file
    i am getting this error

    Reply

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  1. [ROS Webinar] Using MoveIt! with ROS Industrial | The Construct - […] – ROS-Industrial Course – Tutorial: How to control a Gazebo simulated robot with MoveIt! (UR5) […]

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