Pin-slot joint on curved path

[Peter_Stoneham]

I am new to Fusion 360 (3 days) and this is my first project. I couldn't figure how to make a pin-slot joint work in the arrow shaped link (see screencast) or any other type of joint for that matter. It is sort of a rotating pin-slot where the slot is the moving part so you can't really set a direction. In the end I created a contact set but that was problematic because the link kept breaking through the pin when I was working on the the motion studies. I would like to see a joint option for a rotating pin-slot. Also a flexible joint so that I can model the two s[prings that I have left out of the model for this reason. Please vote to get this implemented. Thanks!

[TrippyLighting]

There's no screencast.

[Peter_Stoneham]

I put the Url for the screencast but it didnt seem to work. Screencast attached. I see now that you have to "insert" before it will show up in the post...

[TrippyLighting]

I am not sure I can see in the screencast where you are using a contact set ?

The arc shaped pin slots all seem to have a comon center in the midle of the rotating object so a revolute joint in the middele of that object with properly set joint limits should work ?

[Peter_Stoneham]

Thanks for your response - appreciated! I hope that this screen cast makes it clearer. The pin-slot is the one highlighted in blue at the end.

[TrippyLighting]

Aha, got it 😉

The pin-slot joint should work. The reason why it might not is because the two joint origins involved in the pin-slot joint must be on the same plane.

In this case the joint origins offered for selection are on the bottom, or top surface of the arrow plate. The joint origins offered on the pin axis are eithe on the top, bottom, or middle.

Likely none of the choices ofered on the pin line up with any of the coices offered for selection on the arrow plate.

[TrippyLighting · Accepted solution]

This pin-slot joint should be perfectly possible.

[Peter_Stoneham]

WOW - you made it look so easy!

I eventually figured I had been doing it backwards! The tool tip says, "select location on component to move" which I took to meaning the moving component so I kept choosing the slot first and given the pin was grounded it didn't alow me to select it. Thanks again for your help - just knowing that it was possible was all I needed to push through.

[TrippyLighting]

He He. You just saw the end result. You did not see how I got there 😉

I had to tinker around with it a few times myself to get it right.

[Peter_Stoneham]

Here is the final implementation. I couldn't figure out how to associate a joint origin with a part when that joint origin needs to have construction lines to define it. For instance in this situation the slot is slightly longer so that the pin doesn't bang into the end and therefore there is no conveinent point on the slotted part that aligns with the pin so it is impossible to create the joint without the pin moving to a selectable point on the slot. The work around is to move the pin back after you have created the joint.