The law of motion of the driven link of the mechanism should be chosen based on the requirements for the operation of the mechanism: general (for lifting and lowering sections, displacement, speed and acceleration at the beginning and end of the interval correspond to the set values); due to the nature of the diagram of movement of the driven link and closure of the highest kinematic pair cam — roller; determining the type of functions of ideal movements, speeds and accelerations, as well as the technological load and its derivatives, not at the boundaries of the interval of single-digit displacements, but at its individual sections.