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Hello Everyone,

the answer for this question and #q338443 How to know if the controllers are working/controlling? Spawned robot in gazebo is falling down/crushing to the floor.. It seems the position joint interface is still not working correctly in the Gazebo9(even though it looks like it works when in the rrbot urdf is interfaced as a position controller). Anyway, in a case of position controllers, everything is loaded without a problem, but when the simulation starts, the robot just falls down like there is nothing that controls it. So I do not know if there is a problem with the controller, but I wouldn't say that since the controller has been loaded and started successfully, there is also no problem in the Gazebo9, the problem is the communication/interface between those 2, looks like there is none of it. What I have done is changed the controller interface from the position to effort and added a value for the effort in the urdf, after that it worked. Does anyone knows what could it be wrong with the position controller, does it needs some additional configuration? I mean it wasn't complaining about anything, but it sure didn't work