SCIENCE AND TECHNOLOGY ENGLIAH FOR MECHANICAL ENGINEERING Furthermore. we must establish the radius of the base circle which is numerically equal to the distance from the lowest point on the cam periphery to the center of rotation of the cam The base circle is the basis of the cam outline. to which are added the sequential distances the point of contact of the follower must travel, as indicated by the displacement diagram. The diameter of the base circle must at least be equal to the diameter of the hub. In the case of cams made integral with the shaft, the base-circle diameter must be at least equal to the shaft diameter The horizontal line 0-360 is the x axis of the displacement diagram for certain cam. Imagine that this line represents the base circle of that cam, flattened to a straight line. Any movements imparted to the follower are caused by the profile of the cam material outside the base circle, or, in the diagram above the baselineSCIENCE AND TECHNOLOGY ENGLISH FOR MECHANICAL ENGINEERING Furthermore, we must establish the radius of the base circle, which is numerically equal to the distance from the lowest point on the cam periphery to the center of rotation of the cam. The base circle is the basis of the cam outline, to which are added the sequential distances the point of contact of the follower must travel, as indicated by the displacement diagram. The diameter of the base circle must at least be equal to the diameter of the hub. In the case of cams made integral with the shaft, the base-circle diameter must be at least equal to the shaft diameter. The horizontal line 0-360ºis the x axis of the displacement diagram for certain cam. Imagine that this line represents the base circle of that cam, flattened to a straight line. Any movements imparted to the follower are caused by the profile of the cam material outside the base circle, or, in the diagram, above the baseline