Mechanism - Double Pin Connection?

[LeeCasey]

Hi again!

I'm trying to design an automatic lid with a lifting arm attached to it. The picture will probably make it self explanatory.

I want to add a strut to constrain the lifting arm so that it stays horizontal. I'm not sure how to constrain the strut though. I have tried two pin connections but it doesn't move when I drag the lid. It just locks up.

I have also tried a single pin connection and then a standard Axis->Axis contraint on the second pin but I get the same problem. Could someone shine any light on which constraints I need to use to get that working as intended.

Hope I have explained it clear enough, let me know if I haven't and I'll to animate what I want.

Thanks

Lee

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[VladimirPalffy]

Hello.

In this case do you need use Pin connection and Cylinder connection.

[LeeCasey]

I did actually try that but it locked the part up again. Does it matter which I specify first? I'll try again and play around and report back.

[VladimirPalffy]

It does matter which side do you specify first.

You need to define in one placement feature (two Sets)

You must identify body that go together.

[LeeCasey]

It's still locking up for me. I think I may need to do additional steps. Here are what my constraints look like....

Translation Axis and Rotation Axis are 'orange'. Do I need to set these parameters? What do I need to do here? (if anything)

I can send you the model files if you want to take a look for yourself, would be greatly appreciated.

Thanks

[VladimirPalffy · Accepted solution]

Hello Lee

I thing that your problem is it not with PIn /Cylinder connections, but with definition kinematic scheme?!?

I created two videos. At first (pin_conection.wmv) you can see how define constraints for your model.

For the second (new kinematic scheme.wmv) shows the definition of the new kinematic scheme. I created only axis for connection - you can add new model which represents a new model through the axis.

[LeeCasey]

Hi Vladimir,

Yes I realised this last night and managed to get the desired result.

Thank you very much for your help!

Lee