In the first chapter the authors present an original method to calculate the efficiency of the cams mechanisms.The second chapter presents an original method in determining a general, dynamic and differential equation for the motion of machines and mechanisms, particularized for the mechanisms with rotation cams and followers.The third chapter presents an original method to determine the general dynamics of mechanisms with rotation cams and followers, particularized to the plate translated follower. First, it presents the dynamics kinematics. Then it solves the Lagrange equation and using an original dynamic model with one degree of freedom, with variable internal amortization, it makes the dynamic analysis. The fourth chapter briefly presents an original method for determining the dynamics of mechanisms with rotation cam and translated follower with roll. First, one presents the dynamics kinematics. Then one performs the dynamic analysis of a few models, for some movement laws, imposed on the follower, by the designed cam profile. The fifth chapter presents an original methods to determine the dynamic parameters at the classic distribution, and a new method is presented in the sixth chapter.The seventh chapter presents an original methods to determine the dynamic parameters at the camshaft with rotary cam and translated follower with roll.