This is a basic idea about ball connection for the beginners in Pro-e Mechanism
how do you put constraints to the mechanism? For example how can you make the ball to move inside a cone of 12 degrees? Of course the tip of the cone should be the datume point used for the definition of the ball mechanism.
The option you are asking is in CREO (cone of 12 degree)
Also the same can be achieved in Earlier version with 2 pin connection with one dummy part
NICE!!!! Only available in CREO...
This is something that's missing in WF5.
You can also achieved the same type of movement in Earlier version with 2 pin connection with one dummy part.