01-06-2012, 01:03 PM
Motion Generation Mechanism
Motion Generation Mechanism.ppt (Size: 240.5 KB / Downloads: 60)
Graphical Synthesis – Motion Generation Mechanism
Two positions, coupler as the output
Draw the link AB in its two desired positions, A1B1 and A2B2
Connect A1 to A2 and B1 to B2.
Draw two lines perpendicular to A1 A2 and B1B2 at the midpoint (midnormals).
Select two fixed pivot points, O2 and O4, anywhere on the two midnormals.
Measure the length of all links,
O2A = link 2, AB = link 3,
O4B = link 4 and O2 O4 = link 1
Three positions, coupler as the output
Same procedure as for two positions.
Draw the link AB in three desired positions.
Draw the midnormals to A1A2 and A2A3, the intersection locates the fixed pivot point O2. Same for point B to obtain second pivot point O4.
Check the accuracy of the mechanism, Grashof condition and the transmission angle.
Change the second position of link AB to vary the locations of the fixed points