This article puts forward a control algorithm of variable frequency and adjustable speed of an eccentric cam being applied to the shaping mechanism of ring spinning frames.

Compared with other oscillating follower mechanical rules, analytics is made on the commoneccentric cam mechanism and power, as given the practical scope and the basic parameters.

The paper brings forward and analyzes the non-dimensional formulas of setover eccentric cam from the aspects of the travel, displacement, speed and velocity of the moving parts.

By analyzing the forging process of eccentricity camshaft,the causes of un-accepted forgings would be found,and the displacement process would be shifted forward later on for the final heat area forging reduction.