Slider joint

[chachaman]

Hello,

I cannot figure out how to place a joint slider constraint instead of a regular constraint to make this slat ride in the track....can some one help ?

[JDMather]

No assembly (*.iam) attempt attached?

Also, Flat Slat drawing is incorrect?

[chachaman]

....you wanted  to see this assembly ?

[JDMather]

Didn't you already post that image in the original problem description?

An Inventor Assembly file is of the format *.iam .

[chachaman]

Sorry,

Here is the iam file...

[JDMather]

What is your end-goal with this?

[JDMather]

I assume this part is simplified as there is an interference when assembled?

I would do this portion as a sub-assembly (assuming the planar faces stay parallel).

[chachaman]

it gets assembled like this....accept the constraints I am using make it unstable...

[JDMather]

Why have you attached the same image 3 times?

Why do you want to wind it up?

To see if it fits?

To show an animation?

[chachaman]

Once again, these are all the files....

[johnsonshiue]

Hi! I don't think Slider Joint in Inventor will produce the desirable motion you are looking for. Your best bet is Transitional constraint. There is a trick. You want to limit the scope of transitioning. In the rail part (trk.ipt), you can use Thicken/Offset command to create a zero offset surface on the contact faces. Then you need to edit the transitional constraints so that the transition is between the rods and the offset surface instead. In this way, you will limit the transition scope. Otherwise, Inventor will try to transition components to any faces on the rail part. 

I would not be surprised that the some of the transitional constraints would fail. Another option is to use Dynamic Simulation environment.

Many thanks!

[chachaman]

Hello Johnson,

Thank you for your reply. Is this what you mean ?....please see attachment.

[chachaman]

Hello Johnson,

I did like you suggested. Attached is a simplified assembly. Can you tell me why the pin does not stop at the end of the transitional course ?

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Solved !

Answer: Beacuse the radius of the end of the course must be greater than the diameter of the pin.

[johnsonshiue · Accepted solution]

Hi! You mean the jumping behavior, right? I think that is trick. It is because for the constraint solver's perspective such jump does not violate the constraint. But, the behavior is unintuitive for sure. I don't think there is good workflow in constraining to create the desirable movements.

Many thanks!

[chachaman]

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