Question

For the cam mechanism the following is true

• LOW DWELL in 45°     
• Elevation    3 mm in 135°
• HIGH DWELL in 45°                 
• Fall 3 mm in    135°

if the base radius is 16mm what is the coordinate RX1 in mm of the cam if = 71 degrees, use all decimals, the follower is the knife edge type.

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Answer 1

For the given follower motion, the equations of motion of follower as function of θ are obtained assuming the motion during rise and fall to uniform in nature. Once the equation for motion y(θ) are obtained, then radius of curvature is obtained as the function of θ. At θ=71 degrees, the radius of curvature is calculated and then X and Y coordinates of the cam are obtained.