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2016-02-19 06:38:06 -0600 answered a question Problem with start controller with roslaunch: controller spawner couldn't find the expected controller_manager ROS interface

Hello again :)

In this tutorial, section Install gazebo_ros_pkgs, it says that there is no ros-jade-gazebo-ros-control debian package released for now. Without this, you can't run simulations using ros_control in Gazebo.

What you can do now is clone the gazebo_ros_pkgs repository and compile the gazebo_ros_control package, so you can run your simulation.

2016-02-19 06:28:04 -0600 commented answer roslaunch RRBOT doesn't work

Glad to know this :) As you solved the problem, you can close the question.

2016-02-13 18:18:11 -0600 commented answer I cannot run gazebo 7 with ROS packages on Ubuntu 14. Is it not yet possible to do that?

@nkoenig I didn't know that; glad to hear this notice :)

2016-02-11 15:56:02 -0600 answered a question roslaunch RRBOT doesn't work

The traceback says that it couldn't find a module:

ImportError: No module named msg

Maybe you don't have the package gazebo_msgs. Try to check if ros_%YOUR_DISTRO_gazebo_msgs is installed in your machine.

2016-02-11 15:56:01 -0600 answered a question I cannot run gazebo 7 with ROS packages on Ubuntu 14. Is it not yet possible to do that?

I presume, as you're on Ubuntu 14, that you're using ROS Indigo. The Indigo version uses the Gazebo 2.x series, while Jade version (Ubuntu 15.04) uses Gazebo 5.x.

So I think it is not recommended to do that.

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2015-08-19 18:29:21 -0600 commented answer Problem with the robot model moving itself

The robot description does not have damping tags for now.

2015-08-19 18:27:22 -0600 answered a question Problem with the robot model moving itself

I made the same question in ROS Answers, and this answer helped me a lot. Like I said in the answer comments, the PID controllers wasn't properly tuned, so I dropped down the PID values and now the Hexapod is stable.

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2015-08-17 20:18:22 -0600 asked a question Problem with the robot model moving itself

I'm a beginner in the ROS/Gazebo/robotics world. I started to work in a robotics research lab in my university, and I have to model an Hexapod. Apparently, the URDF Xacro is alright: the visuals, collisions, inertia tensors, COM, mass, joint tags, etc..

But when I spawn the model on GazeboSim, it doesn't get immovable. Instead, it get agitated. I thought is was caused by a bad inertia tensor, so I fixed the meshes from the original solid parts, calculated the mass properties and replaced the faulty inertial tags and meshes. But this didn't solve the problem. When I was recording the screen to post this question, I have noticed that the most I increased the effort limit, the most it became agitated. Here's the video that shows this behavior. And you can see, in the rostopic terminal, that the effort value applied to the joint is the max value (positive or negative) defined in the robot URDF Xacro file, and I don't know why this is happening.

Here's the robot description.

What can be made to solve this problem? I'm getting crazy with this problem haha

Thanks :D

P.S.: Sorry for my English.