![]() ![]() of pairs having two degrees of freedom (higher pair). of pairs having one degree of freedom (lower pair) and P 2 = no. Where F = degree of freedom., N = total no. Since there is a redundant link present in the system.įor plane mechanisms, the following relation is used to find the degree of freedom: So the answer will come 2, which is wrong, If we neglect the count of redundant kinematic pair Hence, the degree of freedom of the mechanism is 1. After considering the redundant pair we shall get a degree of freedom.į r = 1, Kinematic pair between roller and cam.į = 3 × (4 - 1) - (2 × 3) - (1 × 1) - 1 = 1 ![]() Hence we can say that there is a redundant pair in this mechanism. Oscillation of follower ϕ is the function of rotation of cam θ.i.e ϕ = f(θ ). It is not playing any role in the transfer of relative motion. The main purpose of the roller follower is to reduce friction. Where F r = Number of redundant kinematic pair. Where, N = number of links, P 1 = number of pairs with 1 degree of freedom, P 2 = n umber of pairs with 2 degrees of freedom, F r = number of redundant pairs. From Gruebler's criterion, we have Degree of freedom (F) is given by:
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