Hi everyone! I'm a mechanical engineering student and I've problem with this warning.
"not enough constraints appear to be applied to prevent rigid body motion. this may lead to solution warnings or errors. check results carefully."
The model is the boom of an excavator: in target D and E there are the connections to an hypothetical chassis; in target A there is the pin which connects the piston and the boom and permits the rotation. I put the constraints in order to create a three-hinged arch, so I chose the cylindrical supports to recreate the revolute joints (target A, D, E in the figure), blocking axial and radial directions and freeing the tangential one, but it didn't work: "Not enough constraints ..."
So I tried another way: I created two cylindrical coordinate systems, one in target D the other in target E, and I put diplacements like in the figure below, blocking the translations and freeing the rotation, but the problem persists.
Can anyone help me? What should i do to solve the warning?