To design this cam, the outer cam profile is obtained by compensating the single-roller cam profile. Then, the center point of the second roller and the contact point of the cam are obtained by the superposition method, and the center point of the third roller and the contact point of the cam are obtained by the geometric condition of the follower, and then the inner cam profile is obtained.
Dimensions: 75 77 24 (mm^3)
Output curve: 12 mm stroke, rise 120°, dwell 60°, fall 120°, dwell 60°