How to achieve desired motion?

Josy_La

Hi,

I'm trying to animate an awning via various mate connector motion but I'm missing one and can't seem to make it work. In the example below I need the front portion to make a sliding movement towards the outside but when I add this type of mate many other become red and have errors. How can I restrain the movement. Now it is all skewed because both arms do not move in the same fashion.

Can someone help me out?
https://cad.onshape.com/documents/8b02481e4674d566d2c3e285/w/f86c0b3452eb732a17b1e166/e/5cbfac7ebde9510334383ec9

Thanks,

bradley_sauln

It looks like you have not given proper permissions to your private document (security! ). Under the share settings can you please enable the 'link' option so that we can view the document you have shared here.

Josy_La

Oups sorry. Done now.

owen_sparks

Your link still reports read only.

Josy_La

The link has been made viewable in the link tab. I also made it public as can view with copy rights. Do I have to do something else? I thought it was enough.

owen_sparks

Josy_La said:

The link has been made viewable in the link tab. I also made it public as can view with copy rights. Do I have to do something else? I thought it was enough.

Clicking on your link shows a message stating "This document was shared via a link and is view only"

Please ignore the link tab in the share screen.  Just make sure the file has the "can copy" option set and copy the url from your browser into the forum post.

Cheers,

Owen S.

owen_sparks

As a follow up what I think happened is you added the permissions on the link tab, which gives you a new link, but all we have on the post is the original which is read only.

Josy_La

Let me try it again. This is the latest link information for the workspace.

https://cad.onshape.com/documents/8b02481e4674d566d2c3e285/w/f86c0b3452eb732a17b1e166/e/5cbfac7ebde9510334383ec9

owen_sparks

Josy_La said:

Let me try it again. This is the latest link information for the workspace.

https://cad.onshape.com/documents/8b02481e4674d566d2c3e285/w/f86c0b3452eb732a17b1e166/e/5cbfac7ebde9510334383ec9

That's the same link as your first post...

This is what we're after:-



Then copy the url from you browser after you have the file open and lob it onto the forum.

Cheers, Owen S.

Josy_La

Unfortunately that is exactly what I have when I look at the sharing info of my workspace. It is a public document and should be available to read and copy without any issue. 

owen_sparks

It's working now, and appears in the search under public docs so all good.

owen_sparks

So the long bar is the part that moves and the two short gray bars are fixed to a wall?

Josy_La

I'm glad it works now, I deleted and re did the share.

Yes the two short gray are somewhat fix. They are currently attached along an edge until all other components are finalized. But they must pivot for the entire arms to extend and retract. Fascia should remain parallel to wall making the arms stretch symmetrically. Which is obviously not the case now.

owen_sparks

Hi again.

I think this is close to what you're after, if I understand correctly.

I don't believe there is anything mechanical in your design that gives the parallel motion you desire.  You can see this in the file below.  All the mates are "real life" except the final one I've called "Parallel Motion Constraint".  If you suppress this you'll see how I believe the design will actually behave.

You'll see the workaround involved a named position "Closed" leading to an in context edit of the front extrusion to allow a mate connector in the correct orientation for the final parallel mate.

https://cad.onshape.com/documents/728b88e6116bcd225777bc01/w/016c81ff94988f557808e8e3/e/d1a427315df46e9fc7c17784 

Don't know if any of that is any use to you.

Cheers,

Owen S.

Josy_La

Thank you very much for your trouble Owen, I will take a look at your solution today.

Josy