My robot cannot control selected joint motion using up/down arrow keys after importing

I imported my own robot using the urdf importer, the Controller Script and the urdf robot script are all set up, and once in the game, you can use the arrow keys to select joints, use the left/right arrow keys to browse joints, and the selected index is highlighted in red shows, but go can't control the selected joint motion with up/down arrow keys, please guide me how to solve this situation.

 

One possibility is that you forgot to set your x drive articulation body parameters (stiffness, damping, ...) for every movable articulation body. Without these parameters there won't be any visible movement. Check the controller section in the URDF setup tutorial for a rough idea: https://github.com/Unity-Technologi...main/tutorials/urdf_importer/urdf_tutorial.md

 

Thank you very much for your answer, but this is what confuses me, my stiffness and damping and all parameter settings of the controller script are in line with the official tutorial. However, there is still a situation where the joint cannot be moved. At runtime, you can see the joint selected and set by the controller, but it cannot move.

 

My fault, the driving force of x drive and lower limit upper limit are not set, the problem has been solved, thank you very much for your guidance