Tchebicheff's table linkage 2

Input: blue grounded double crank that receives the rotation from a motor.
This is an embodiment of the mechanism shown at:
https://youtu.be/iY4xdOo5FUg
The blue line is the trajectory of a point on the pink table. The direction of the table is kept unchanged during motion.
Dimensions:
Blue crank: 1 + 1
Green bar: 2.5
Yellow bar: 2.5 + 2.5
Pink bar: 4
Distance between ground joints: 2 + 2
Under the action of gravity, the mechanism has two stable equilibrium positions when the double crank is vertical.

Inventor files of this video:
https://www.mediafire.com/file/on6rrnw5w77cgkk/TchebicheffTableLinkage2Inv.zip/file

Видео Tchebicheff's table linkage 2 канала thang010146