Arms of glasses don't move even when I have a rotation joint.

[bgreens2]

I have 2 cylinders in which the arms of the glasses are connected via a joint. These cylinders are connected to the frame of the glasses via a rigid joint. I cannot move the arms about the rotational axis of the joint. Please Help

[KristianLaholm · Accepted solution]

You need to Ground one component of the assembly.

Right click the component in browser (in your case the center frame) and select "Ground".

[bgreens2]

Thank you!