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ME 560 Kinematics
Name of Student_______________________________
Fall Semester 2010
Project No. 2. Due in lecture on Wednesday, October 6th.
Given a planar fourbar linkage with the following link dimensions:
O A
2 inches,
A B
3 inches,
O B
2.5 inches,
and
O O
4 inches.
24
2
4
==
=
=
Part (I).
Is this a Grashof fourbar linkage or a nonGrashof fourbar linkage?
Part (II).
Choose a suitable scale for the fourbar linkage and draw the fixed centrode (or polode) and the
moving centrode (or polode) for the motion of the coupler link AB (which can be denoted as link 3). Use
the open configuration, and clearly reference the fixed and the moving centrodes on your drawing.
The recommended procedure is to first draw the fourbar linkage and the polodes by pencil on
engineering paper, as accurately as possible and to a good scale. Then use a computer graphics package to
generate the fourbar linkage and the polodes. Note that the fixed centrode (or polode) is the path traced
by the instant center I
13
(or I
31
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 Fall '10
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