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Simple problem dynamic simulation

12 REPLIES 12
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Message 1 of 13
241victor
676 Views, 12 Replies

Simple problem dynamic simulation

Hi

I am trying to move the red piece in the video. I want to rise up and move it down and also it stays in the same place but i dont know how to do it

 

http://www.youtube.com/watch?v=LBmaDMa40ns#ws


On the other hand:
i am also trying to lower the piece at the botton of the ramp in a kind of container

 

 

http://www.youtube.com/watch?v=B-vep-vIq8w#

 

I am spanish ¿can you understand me?

thanks u¡

12 REPLIES 12
Message 2 of 13
jabirsaif
in reply to: 241victor

It looks like one of the pieces youre trying to move is grounded.

I don't know what the mechanism is exactly, but you need one reference grounded part.

You also need to add a 3D contact joint between the parts so that they don't intersect.

 

I hope this helps.

 

-Jabir

Message 3 of 13
JDMather
in reply to: 241victor

Can you attach your assembly here.


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Message 4 of 13
241victor
in reply to: JDMather
Message 5 of 13
241victor
in reply to: jabirsaif

I dont understand you

 

I have recorded a video showing how i made the simulation .. ¿why the red piece dont follow the graph?. I want the piece come back to the original place 

 

http://www.youtube.com/watch?v=G34xcu4D4bg&feature=youtu.be

Message 6 of 13
JDMather
in reply to: 241victor

Looking at your Imput Grapher for the force - I don't understand what you are trying to do.

 

I suspect that what you really want to do is edit the Position of the Prismatic Joint.

 

See attached.

 


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Message 7 of 13
JDMather
in reply to: JDMather

In your second problem I think you want a Spatial Joint and a 3D Contact Joint.

 

But before you get into an advanced topic like Dynamic Simulation I recommend you go through this document

 

http://home.pct.edu/~jmather/skillsusa%20university.pdf

 

I noticed that your part sketches are not constrained.


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Message 8 of 13
241victor
in reply to: JDMather

okay thanks you

But I dont understand why the simulation time is not the same that the imput time grapher. In other words, i see that the imput grapher time doesn`t match with the simulation time, otherwise you`re downgrading the main force instead of putting it in a negative magnitude with the purpose of change the direction. Sorry about my bad english.  we want to simulate this industrial process:

 

http://www.youtube.com/watch?v=vten1EEODLA&feature=youtu.be  

 

it could be posible?, the pieces that i sent you were the 'drill' also i want to rotate the main table with holes, when the grey circular piece fall inside them using the ramp

Thanks for the manual it is very useful. I will read it tonight

Message 9 of 13
JDMather
in reply to: 241victor

I left the Force on your assembly - but that should be removed.

You want to activate the Position of the drill using the Prismatic Joint.

If you are intersted in the unkown forces - that is a secondary question.

I will see if I can get one of my students to take this on as a project.


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Message 10 of 13
241victor
in reply to: JDMather

Thanks you for the help again. We have advanced a lot in the proyect. Now we got the main problem with the ramp. We want that the piece fall into one of the container in a horizontal position, as it is showed at the video.

The rest is done, we only want to solve ther ramp part. Your help is being very usefull.

 

Here is my proyect (Festo.iam):

http://dl.dropbox.com/u/18036283/festo.rar

Message 11 of 13
241victor
in reply to: 241victor

Up

Message 12 of 13
JDMather
in reply to: 241victor

I haven't opened your second attachment yet (I don't have rar extractor) but did you use a Spatial joint and 3D Contact  joint?


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Message 13 of 13
241victor
in reply to: JDMather

Hi

 

Yes we use them. We have simulate this:

http://www.youtube.com/watch?v=PBdGvAmWKzs

But we don't konw how to put the piece into the container in an horizontal position, and then, move it around the table. We need help, in this issue, we hope that you can help us.
I think that if we make impenetrable the rotary table we should be able to move the piece arround the table

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