4-bar linkage

This is the simplest interesting linkage: 3 bars plus the base makes 4. Grab the red point to move the linkage, the motion of the green point is plotted as the output.

Move the black points in the figure, or in the list of rods change the lengths or the location of the green point to change the geometry and find a new orbit. (ORBIT NOT SHOWN IN HTML VERSION)

Created with Cinderella