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2012-07-03 03:36:34 -0500 commented question "gazebo/clear_joint_forces" service doesn't work

tor, u mentioned that the reason why the cuboid remains spinning is probably due to its inertia~ but i still don't understand why clearing the force makes no difference in speed of the rotation. it seems that the cuboid spins at the same speed whether i clear the force or not.

2012-07-03 03:22:28 -0500 commented question "gazebo/clear_joint_forces" service doesn't work

yeah i tried applying counter force (negative effort)like "rosservice call gazebo/apply_joint_effort '{joint_name: link_joint, effort: -0.01, start_time: 10000000000, duration: 1000000000}'", and after applying the counter force the cuboid stop spinning.

2012-07-01 23:39:08 -0500 asked a question "gazebo/clear_joint_forces" service doesn't work

i was following the tutorial titled "Gazebo ROS API for C-turtle". and there's part applying joint effort by using "apply_joint_effort" service(provided by "/gazebo" node) and clearing it back by "clear_joint_forces" service. Applying effort part was OK, but clearing it by "clear_joint_forces" service doesn't seem to work. it doesn't throw any error, it just silently pass through the "rosservice call gazebo/clear_joint_forces '{joint_name: link_joint}'" command and back to "#" command-line. And the cuboid in the simulator still spins. Any-body has the same problem?

2012-07-01 23:11:15 -0500 commented answer Stopping a node by "Ctrl+C" doesn't update "rosnode list" command's result.

sorry about late reply~ didn't file a bug yet:)

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2012-05-31 22:21:00 -0500 commented answer Stopping a node by "Ctrl+C" doesn't update "rosnode list" command's result.

happen with ROS electric. I didn't try out every version of ros but the problem that didn't happen with "electric" happens with "fuerte" version seems that it's the problem of "fuerte" version of ros. is there a place within the wiki I can report this bug(I think)? and thank you again Piyush:)

2012-05-31 22:20:43 -0500 commented answer Stopping a node by "Ctrl+C" doesn't update "rosnode list" command's result.

Thanks for the answer~Piyush. I tried your suggestion and it worked fine as expected. The problem I mentioned earlier though happened when running "turtlesim_node"(of turtlesim package. a part of ros installation). so i guess it's a problem of something else. and i found out that the problem doesn't

2012-05-31 22:19:31 -0500 commented answer Anybody knows how to uninstall ROS?

and just curious.. if i want to uninstall ros for some reason,, how can i uninstall it? is there some sort of installer taking care of uninstalling ros? or should i remove the entire "opt" directory by "rmdir" command?

2012-05-31 22:19:22 -0500 commented answer Anybody knows how to uninstall ROS?

thanks for the answer Piyush~ within .bashrc file i have "source /opt/ros/fuerte/setup.bash" "export ROS_PACKAGE_PATH=~/ros_workspace:/opt/ros/fuerte/share:/opt/ros/fuerte/stacks" "export ROS_WORKSPACE=~/ros_workspace". Approriate setup will be replacing "fuerte" with "electric"?

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2012-05-31 21:51:26 -0500 answered a question Stopping a node by "Ctrl+C" doesn't update "rosnode list" command's result.

Thanks for the answer~Piyush. I tried your suggestion and it worked fine as expected. The problem I mentioned earlier though happened when running "turtlesim_node"(of turtlesim package. a part of ros installation). so i guess it's a problem of something else. and i found out that the problem doesn't happen with ROS electric. I didn't try out every version of ros but the problem that didn't happen with "electric" happens with "fuerte" version seems that it's the problem of "fuerte" version of ros. is there a place within the wiki I can report this bug(I think)? and thank you again Piyush:)

2012-05-31 20:57:27 -0500 asked a question Anybody knows how to uninstall ROS?

I installed ros fuerte, but i want it to be replaced by ros electric. so basically i want to uninstall fuerte and install electric version. anybody knows how to do this?

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2012-05-30 20:54:25 -0500 asked a question Stopping a node by "Ctrl+C" doesn't update "rosnode list" command's result.

hello everyone. i am new to ros. i just started studying ros. i'm following tutorials for beginner now, and i found one thing that doesn't seem to be right. there's a tutorial titled "Understanding ROS Nodes" and it showed me the way to stop a node by pressing "CTRL+C" and to display currently running nodes on the screen by "rosnode list" command. here is the question. if I stop a node by pressing "CTRL+C", shouldn't "rosnode list" command "NOT" display the node I just stopped? Apparently, it still displays the node although i stopped it. is this how it's supposed to be? or is this a bug?