How to assemble a ball joint with constraints

[Anonymous]

I download lego hero factory model made by solidworks and then imported them into inventor. I'd like to put all the parts together. However, I don't know how to limit the motion of those ball joints. I don't want them pass through other parts. I have tried the Contact Set. But after activation, the part will not move. 

if possible, plz expain how to do this using the attached file

[JDMather]

The parts are not modeled correctly - you will have to edit to add clearance.

It could be that the ball and socket are modeled correctly - but in the real world the socket part expands on the ball and the player overcomes the friction.

If the parts are modeled correctly - you will have to use motion limits to control, I would do this in the Dynamic Simulation Environment.  (advanced topic)

The socket is smaller than the ball.

[t_hascj]

Hi,

The ball joint doesn't support limits. You can try to post this on the Idea station?

The reason why Contact Set doesn't work is because components interfere together (Use Analyze Interference command). The solution is to change a hinges or sockets on components.

Thanks,
Jaroslav

[h.vandeweerd]

You can do it using 2 constraints ( not joints): one point-to-point (with mate-constraint) and one angle-constraint. on the centerlines of the sphere.. When you make the angle-contraint for the first time you can set a min. and a max value.. You cannot modify  these values afterwards. You can change the value by double clicking the angle-constraint in the browser. ( a little bit strange). See attachment.

[SBix26]

@h.vandeweerd You have used a Directed Angle constraint, which, in Inventor 2018, does not allow limits to be set.  If you change it to Undirected Angle, you can enter limits, and edit those later as you wish.

Sam B

Inventor Professional 2018.2.3
Windows 7 SP1