In a negative let-off motion, the warp tension should be maintained at 600 N throughout the weaving process. Tight side tension of chain is four times that of slack side. The weight suspended is 20 kg on either side and wrap of chain is 1 round the ruffle. The diameter of the ruffle is 10 cm. Calculate the co efficient of friction and leverage x/y when the beam diameters are 15 cm and 40 cm