Problem of the Month
A double-dwell cam is shaped from the arc of a circle radius 3cm and the arc of a concentric circle radius 5cm, along with smooth transition curves.
The cam rotates about the center of the circles A.
A flat face follower BC pivots around B.
The follower maintains tangential contact with the cam,
BD is the lower position of the follower (tangential to the inner circle).
BE is the higher position of the follower (tangential to the outer circle).
If the angle DBE is 12 degrees, what is the distance AB?
What is the largest angle DBC that can be achieved with this cam, if we change the distance between A and B?