Unit5: Ros Manipulation

I am doing unit5, on giving command
roslaunch fetch_gazebo_demo move_torso.launch
and after that launching trajectory, the fetch robot behaves the way shown in video, is it behaving right? means after some seconds it moves up and down following the motion planing.

Hello @misbahsuhail123 ,

As shown in what video? I can’t see any video.

Here is the video attached, I just want to know that fetch robot’s will do same motion as shown in video, Just after running launch file the robot moves up and down along with motion. will robot behave in this way?
I am facing the same thing in working with ur3 robot.

Hello @misbahsuhail123 ,

No, the robot shouldn’t be doing those sudden changes. That is probably because it is receiving multiple data about the joint states of the robot.

What to do for that, i just followed the steps given in the unit. Kindly guide.

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