Design a crank and rocker for a six-bar linkage such that the slider in Fig. P9.6 reciprocates a distance of 800 mm with an advance-to-return ratio of 1.12;

use a = r4 = 1 200 mm and r5 = 1 800 mm. Locate O4 such that rocker 4 is vertical when the slider is at midstroke. Find suitable coordinates for O2 and lengths for r2 and r3.