CAM DESIGN 349 Half joint Half joint Follower Follower I cam 2 Y cam 04 Vfollower Track or groove Cam Cam Track or groove (a)Form-closed cam with translating follower (b)Form-closed cam with oscillating follower Conjugate 2 Follower 8 (c)Conjugate cams on common shaft cam Conjugate 1 FIGURE 8-2 Form-closed cam-follower systems dial cams because the follower motion is generally in a radial direction.Open radial cams are also called plate cams. Figure 8-4 shows an axial cam whose follower moves parallel to the axis of cam rotation.This arrangement is also called a face cam if open(force-closed)and a cylin- drical or barrel cam if grooved or ribbed(form-closed). Figure 8-5b shows a selection of cams of various types.Clockwise from the lower left,they are:an open (force-closed)axial or face cam;an axial grooved (track)cam (form-closed)with external gear;an open radial,or plate cam(force-closed):a ribbed axial cam(form-closed);an axial grooved (barrel)cam