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2023-04-10 17:10:40 -0500 | marked best answer | Custom action goal: "has no attribute" error I have created a custom action called TakePosition.action with the following data : When I try using my TakePositionActionGoal in my client.py script, I get an error saying : Here's my client.py script : The porpose is to create pose data which I can pass to my custom action server which would calls move_base with the recieved pose. Clearly there is an x attribute in my action definition. I don't understand what the souce of this error is. |
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2022-10-12 04:45:50 -0500 | marked best answer | Moveit limited full joints explanation I'm running the moveit launch files at https://github.com/ros-industrial/uni... . The last set of instructions have the following instructions:
Can someone please help me understand what that means? |
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2022-05-30 11:40:54 -0500 | marked best answer | Ros publisher message type for arrays Can someone please tell me what message-type to use in publishing the following array?: I'm reacquainting myself with ROS and learning the basics as I modify a basic talker to publish the array above instead of a string. I have consulted documentation but I'm having difficulty figuring out which of those message types to use, if any. publisher = rospy.Publisher('/all_topics', ???, queue_size=1) |
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2022-04-25 02:43:08 -0500 | marked best answer | Reducing the speed/velocity of a UR5 I'm executing the ros-industrial launch files on a real UR5 robot but I would like to reduce the speed at which it executes my moveit plans. Can anyone advice how I can do that from a python package, please? |
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2022-03-28 02:16:22 -0500 | marked best answer | URDF spawn into Gazebo world error How can I spawn a URDF into a custom Gazebo world, preferably using a launch file? My task is to launch my custom Gazebo world which has a DEM of Mongolia. I also have to spawn a URDF of a robot into the same Gezebo instance. For the DEM, I followed this tutorial. Which worked well for me. But then I tried the following command to try spawning my robot: The terminal only shows the following output and nothing else happens:
When I stop the terminal, i:e Ctrl + C, I get the following output: Can anyone help me resolve this issue, please? My package has the following structure: *PS: * This work fine if I execute: |
2022-03-17 10:02:43 -0500 | marked best answer | Transforming in combined tree I have a task of using a static ur5 manipulator to detect and point at a mobile turtlebot. I am a beginner and I'm told transforms is the solution I want. (Please comment if you disagree). I have a ur5 and a turtlebot3 spawned into a an empty gazebo world. I have a static transform publisher, shown below, in my launch file which I use to combine the tf trees of both robots. So the merged tf tree is as follows: The green bordered section on the right of the image is the turtlebot3 tf tree. Everything else is the ur5 tf tree. As my static transform code shows, I attached the turtlebot tree to the ur5 tree at the world node. Further down the ur5 tree I highlighted in red the wrist_3_link node which is the node of origin for my attempted transform. The destination node is the base_footprint node, the second and last node on the turtlebot3 side of the tree. However, my can_transform attempts at return 0 (false). So as you would expect lookup_transforms errors: And, just to test, I tried a can_transform between nodes entirely on the ur5 side of the tree, i:e base_link to world, but still the result was false. I'm not sure what I'm missing and/or doing wrong. I would appreciate some help. |
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