Help with simulation - catapult: trebuchet

[Anonymous]

Hello, I'm new to the inventor, I wanted help with the simulation of a trebuchet catapult

[TheCADWhisperer]

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@Anonymous wrote:

Hello, I'm new to the inventor, I wanted help with the simulation of a trebuchet ...

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Can you try the image attachment again?

Can you ask your instructor to join this discussion?

[Anonymous]

[TheCADWhisperer]

I am curious - how old are you?

Is this a school project?

The next step is you will need to put the parts together in an assembly file.

[Anonymous]

Yes, it's a project for school, physics project, and my group wants to do it virtually, sorry my english is very bad.

ready I put the parts together

[TheCADWhisperer]

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@Anonymous wrote:

...ready I put the parts together

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Can you attach your assembly file here?

[Anonymous]

Yes, I understand a little, now I'm trying to understand how to put these joints

Can you share your file with me? please

[TheCADWhisperer]

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@Anonymous wrote:

...Can you share your file with me? please

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Before I share my solution - where is your instructor?

Can you ask your instructor to join this discussion?

[Anonymous]

I do not have an instructor, what I learned was in youtube video lesson. I'm learning alone.

[TheCADWhisperer]

Did you figure out how to make it work?

[Anonymous]

I'm almost, hey why when I apply the "joint revolution happens this"?

One piece enters another

 I already activated the "contact set"

[TheCADWhisperer]

You can turn off Contact Set - you will not be using it.

3D Contact Joint is not the same as Contact Set.

Your arm (I think it was part 9) was very poorly modeled and not symmetrical about the Origin planes.

You can still use it - but you have to do a little trick - which I will show tomorrow morning.

I will post my assembly tomorrow.

[Anonymous]

Sorry, I'm really bad at modeling. My school does not teach the inventor, my group had the idea of comparing the project in real and virtual environment. 

thanks for your help.

[JDMather]

You probably should have made the weight box as a separate part so that you could adjust the weight without also changing the arm weight.

Note the Points that I added to your parts for Mate1 to center them on the rod.
Mate2 is the axis of the hole to the axis of the rod.

I added Friction to your Revolution Joint which might not be part of your hand calculations.

I changed the size of the projectile so that I could see it better, change it back to your original size and compare the results.

[Anonymous]

obrigado, TheCADWhisperer e ao JDMather, por me ajudar, eu aprendi muito.

JDMather I understood a lot how you did each junction, thank you.

I do not know if I understood. You meant to separate the parts, like putting a rope? How would you do that? Will it be if I do this to the performace improvement?