A four-bar mechanism is used to transmit power to slider E. Link AC rotates counterclockwise at 100 rpm. A and B are fixed points. The following linkages are measured in cm: AC=35, AB=70, CD=45, BD=45, DE=40. Find the instantaneous velocity of slider E in cm/s 1.Draw the mechanism in appropriate scale on your paper
A four-bar
1.Draw the mechanism in appropriate scale on your paper
2. Find the instantaneous linear velocity of C
3. Find a point on your paper to draw the velocity polygon and scale the magnitude of the computed linear
velocity
4. Use the relative velocity equation for finding the linear
velocity of D; ? = ? + ?
? ? ?/?
5. Remember that although the magnitudes are unknown, their directions can be identified
6. Obtain the magnitudes of the unknown velocities from the velocity polygon
7. For Link DE, repeat the process by using ? = ? + ??
the line as much as needed
8. Remember that E is a SLIDER therefore it can only go
in the direction where its movement is not constrained
? . Add the
?/? ?/?
?
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