I am designing a Cylinder Head from a 3D scan and the task is to provide a realistic animation in regards to the valve heads opening and closing. To do this a Cam must used to push a cam follower down onto the valve and eventually the spring. I am having issues inside then cylinder head block assembly and also outside in a more simplistic version of the assembly. The same error message appears, One or more of the Cam entities have a radius less than that of the follower. This really confuses me as the Cam follower is a horizontal surface.

Any advice towards this issue would be great!