I have a sinusoidal mechanism I am trying to simulate. I can get the kinematics to work fine by using two mechanism constraints: the first being a cylinder connection which controls the axis and angle of my assembly. Then I projected a circular sketch onto the sinusoidal surface and used a slot constraint where a point follows the projected curve. A spring keeps these two surfaces in contact. In the video I can have the structure swing back and force indefinitely due to the force of the spring. There is no friction in the system yet. I would like to have the two surfaces generate friction to eventually damp the system to 0. Is this possible? I haven't had any luck with either cam or 3D contacts.