A crank and slotted lever Quick Return Motion Mechanism used in a shaping machine has a distance of 200 mm between the centre of oscillation ‘A’ of the slotted lever and the centre of rotation ‘B’ of the crank. The radius of the crank BC is 100 mm.
(i) Show on a diagram the extreme positions of the lever AD during one complete rotation of the crank.
(ii) Find the ratio of the time of cutting to the time of the return stroke.