Chrono help for example file

Comments on CHRONO example lpendulum_rheo.r3d

Test limits in links.

What to do: load the file and press the play button on the animation timeline (watch at least 3 seconds of simulation).

Constraints which link 'moving' references can be used too. In this case, the ground reference which represents the hinge of the pendulum is moved with a sine function, inside the ground body (open the marker property window to edit the sine function).