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2013-11-27 21:32:26 -0600 asked a question How to setup Pioneer 3-dx for building a map

In the navigation/tutorial/RobotSetup

http://wiki.ros.org/navigation/Tutorials/RobotSetup

I tried to set up my Pioneer 3-dx following the transform configuration, sensor information, and odometry information. But I failed all the time, I don't know how to change those codes to fit my robot.

For example, I feel that the transform configuration is not really essential. How to set the velocity in the odometry information?

Thank you so much, if anybody could give me some advice.

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2013-10-30 17:35:04 -0600 commented answer How to install ROS on Poineer-3DX

Thanks for your reply. For the first question, if you install ROS on the onboard computer, how would you use ROS with the Pioneer? I mean that maybe you need a displayer to connect to robot and a keyboard and a mouse。

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2013-10-28 22:20:54 -0600 asked a question How to install ROS on Poineer-3DX

Hi,everyone. I have a Poineer-3DX robot, the onboard computer system now is Windows 2000. I can connect the robot with my laptop(already installed with ROS hydro and Ubuntu 12.04) through a serial line。 My first question is: whether I should install ROS on the onboard computer? If I have to, how to install? The instruction of the installation is not clear.

My second question is :When I send the command

rostopic pub -1 /RosAria/cmd_vel geometry_msgs/Twist '{linear: {x: 0.1, y: 0.0, z: 0.0}, angular: {x: 0.0, y: 0.0, z: 0.0}}'

to the real robot, it can move, but very slowly even I change the linear x velocity to a bigger value, what's the problem? However, if I run the command to the simulator, the change of the velocity works.

Thank you guys.

2013-10-13 16:09:54 -0600 asked a question How to add objects in Gazebo world

Hi,everybody.

I start the simulation in the Quick Start, and then try to start the Explore the Gazebo world.After opening the RViz, it won't show much at first, so I need to add some objects to it. But how can I add objects? When I use the cursor the choose a object to the Gazebo world, the object moves following my curse and will not stop. Even if I click the left button, the chosen object followed my mouse. Anybody can help?

Thank you so much. My version is Ubuntu 12.04 and Hydro.

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2013-10-07 16:18:21 -0600 commented answer rosmsg show beginner_tutorials/Num can‘t work

I don't know why your method doesn't work. But I finally figured out the problem. Before inputing: $ rosmsg show Num. I should input these codes: $ cd ~/catkin_ws/ $ catkin_make $ source devel/setup.bash Then the problem is solved. But I still don't know why.

2013-10-07 12:45:19 -0600 marked best answer how to edit the ~/.bashrc file

The default editor for rosed is vim. To set the default editor to something else edit your ~/.bashrc file to include: export EDITOR='emacs -nw' But I don't know how to edit the ~/.bashrc file.

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2013-10-06 23:28:21 -0600 asked a question rosmsg show beginner_tutorials/Num can‘t work

In the tutorial Creating a ROS msg and srv ,in the 2.2 chapter, when I input the

rosmsg show beginner_tutorials/Num

I can't see:

int64 num

And when I input the

rosmsg show Num

I can't see

[beginner_tutorials/Num]:
int64 num

either.

What's the problem?

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