I’m doing the project to try moving the Dobot Magician robot arm using MoveIt. Does a 3D model robot in Rviz need to be precisely the same as a real robot arm? Can I construct 3D model with very simple elements like cylinders and boxes…?
No, it’s not required that the model is precisely the same as the real robot arm. However, if your goal is to end up running your code in the real robot, it would be a good idea that the simulation is as close as possible to the real robot.