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Felix Exner (fexner)
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Clarify robot startup in README (#790)
This aims at having a quick start in the README. Especially, the play step was missing before.
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README.md

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@@ -93,21 +93,25 @@ For getting started, you'll basically need three steps:
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binary package installation unless you want to join development and submit changes.
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2. **Start & Setup the robot**. Once you've installed the driver, [setup the
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robot](https://docs.ros.org/en/ros2_packages/rolling/api/ur_robot_driver/installation/robot_setup.html)
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robot](https://docs.ros.org/en/ros2_packages/rolling/api/ur_robot_driver/installation/robot_setup.html)
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and [create a program for external
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control](https://docs.ros.org/en/ros2_packages/rolling/api/ur_robot_driver/installation/install_urcap_e_series.html).
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Please do this step carefully and extract the calibration as explained
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[here](https://docs.ros.org/en/ros2_packages/rolling/api/ur_robot_driver/installation/robot_setup.html#extract-calibration-information).
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Otherwise the TCP's pose will not be correct inside the ROS ecosystem.
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Please do this step carefully and extract the calibration as explained
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[here](https://docs.ros.org/en/ros2_packages/rolling/api/ur_robot_driver/installation/robot_setup.html#extract-calibration-information).
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Otherwise the TCP's pose will not be correct inside the ROS ecosystem.
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If no real robot is required, you can [use a simulated
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robot](https://docs.ros.org/en/ros2_packages/rolling/api/ur_robot_driver/usage.html#usage-with-official-ur-simulator)
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that will behave almost exactly like the real robot.
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If no real robot is required, you can [use a simulated
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robot](https://docs.ros.org/en/ros2_packages/rolling/api/ur_robot_driver/usage.html#usage-with-official-ur-simulator)
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that will behave almost exactly like the real robot.
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3. **Start the driver**. See the [usage
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documentation](https://docs.ros.org/en/ros2_packages/rolling/api/ur_robot_driver/usage.html) for
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details.
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4. Unless started in [headless mode](https://docs.ros.org/en/ros2_packages/rolling/api/ur_robot_driver/ROS_INTERFACE.html#headless-mode): Run the external_control program by **pressing `play` on the teach pendant**.
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### Install from binary packages
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1. [Install ROS2](https://docs.ros.org/en/rolling/Installation/Ubuntu-Install-Debians.html). This
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branch supports only ROS2 Rolling. For other ROS2 versions, please see the respective

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