Joints and links of a robot arm moves randomly in Gazebo

asked 2021-04-19 12:23:25 -0500

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Hello everyone ! I'm new in using Ros and Gazebo , and am having a problem with Gazebo . I am using ros kinetic on ubuntu 16.04 with gazebo 9 . When i launch the gazebo.launch the robot's joints rotates randomly and i don't know why ! I tried to add controllers and the problem remains.

here is a video of the simulation :

Is there any solution to this problem ? Thank you !

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