Hello!
I am trying to assemble a mechanical device that contains one body (an axle, body A) that is free to rotate in relation to ground and then on this body there is a new body (a ring, body B) that is free to rotate in relation to the first body but with its axis coincident with the first axis.
My idea to model this was to constrain body A with a pin connection to ground and then constrain the body B to the first with a new pin connection. I am allowed to do this but it doesn't behave as expected because when I try to drag the body B around its axis on A it to starts to rotate around its own axis to ground so that both rotates in relation to ground. I understand that this behavior doesn't contradict the connections but it is still odd behavior and when performing a dynamic simulation later I don't want the extra mass of B to effect the inertia of A.
Do anyone know why it behaves like this and if there is anyway around it?
Kind Regards