For a 4-bar linkage with ri =7-in, r2 =3-in, r3= 9-in, and r =8-in, determi the minimum and maximum transmission angles.

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Explanation:

=7 in, =3 in,  =9in

       ,=8 in

  Transmission angle (μ ):

                   It is the acute angle between coupler and the output (follower) link.

Here we consider link as fixed link , as input link ,link as coupler and link   as output link.

As we know that

When link will be horizontal in left side direction then transmission angle will be minimum and when link will be horizontal in right side direction then transmission angle will be maximum.

Now by putting the values we will find

Hence, The minimum and maximum angle of transmission angle is 26.38° and 71.79° respectively.

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