A cam is required to give motion to a follower fitted with a roller that is 50 mm in diameter. The lift of the follower is 30 mm and is performed • with uniform acceleration for 12 mm, the cam

turns through 45° • with uniform velocity for 12 mm, the cam turns through the next 30°

• with uniform deceleration for the remainder of the lift, the cam turns through the next 45°

The follower falls through immediately with simple harmonic motion while the cam turns through 120°. Then a period of dwell is followed for 120° of the cam angle. Construct a lift and fall diagram on a cam angle base. Also, draw the outline of the cam. The least radius of the cam is 35 mm. The line of motion of the follower passes through the centre of the cam axis.

Answer rating: 100% (QA)

thna... View the full answer