We use the Ball-Joint for spatial mechanisms. Most often, we use them to join Parts that are different Mechanism-Editors, when the Mechanism-Planes are perpendicular[⊥] to each other.
A Ball-Joint must be added at each end of one Part.
Use the Ball-Joint dialog-box to edit parameters of a Ball-Joint.
See Also: Add Ball-Joint. Tutorial 12: Design a Spatial Mechanism
The actual Ball-Joint element may be hidden inside the symbol of the Connecting-Part.
The Ball-Joint element should now show in the Selection-Window
The Ball-Joint dialog-box opens.
Ball-Joint dialog-box parameters:
Enter the diameter for the symbol of the 'Ball-Joint's Symbol'.
Notes: Do Visibility toolbar > 'Show Model in Mechanism' to view the Ball. Typically, make the radius symbol of the Ball-Joint to be 1.25 <> 1.4x the symbol for the radius of the Connecting-Part.
The distance [±] to move the Ball-Joint along the Z-axis from the Mechanism Plane.
When you edit Ball-Offset, the Ball-Joint will move from the Mechanism-Plane.
Why do you need this parameter? See Ball-Joint configurations
The kinematic analysis of a Dyad with two Ball-Joints is different to that of a Dyad with two Pin-Joints. The kinematic analysis is different to uses the Ball-Offset parameter to calculate positions, velocities and accelerations.
Enter the Mass of the Ball-Joint.
MechDesigner calculates planar forces. The centre-of-mass is coplanar with the Mechanism-Plane.