two paths two pivot points

[PEU]

Hi, long time no post...!

I cannot make this work, I have two parallel pieces, the blue one is fixed and the handle uses two pivot points, once one of the extremes of the small path reaches the end, it becomes the pivot for the rest of the movement of the large path.

What I did:
- added a point at the center of each red axis
- drawn the paths and also added a point in the mid of each paths
- made two path mates, one for each axis, where the axis center point is the vertex and the path... well the path

If I leave this as it is, the part revolves in any non parallel position that satisfies both mate paths, not good

Then I tried a symmetry mate using the point in the center of the axis and the point in the center of the path for the small path, making it min distance zero and max distance path length/2, this constrained the movement of the small path perfectly

then I wish to do the same for the large path I get into trouble, cannot do it.
if I try to mate the planes parallel, also can't do it

How would you do this so the blue is fixed and the grey one moves parallel to it and its limited to both paths and depending on its place at the ends of the small path or the top of the large path one of the axes becomes the pivot point?

Thanks

 

[MintJulep]

That's really unclear.

 

[PEU]

LMAO, thanks for the reply, please let me clarify it, now that I re read it its indeed not clear LOLLLL

Please take a look at the three key positions, I want to make this assembly, the blue part is fixed. and I want the lever to be able to move only on the defined paths to complete the initial to final travel.

Does this help?

Thanks!

 

[Compositepro]

Extend your lever to the left, beyond the left pivot point, and push down or pull up with a cylinder. Weight or a spring can be used to assist lowering the right end of the lever.

 

[PEU]

Extend your lever to the left, beyond the left pivot point, and push down or pull up with a cylinder. Weight or a spring can be used to assist lowering the right end of the lever.

Im looking to limit the movement of the lever constrained by the paths, then I can start with other mechanicals. Thanks for the reply!

 

[MintJulep]

I cannot make this work

Because it's unworkable.

Why don't you explain what you're trying to do (not how you think it should be done), then you're likely to get some suggestions.

 

[PEU]

Hi, I don't understand why you say it is unworkable; I showed the images on how I want the piece to move, it's not some MC Escher impossible shape, I just don't know how to mate the paths based on the explanation I gave in this quoted post. I'm stuck at this point, there will be more mechanicals added that take care of inconsistent moves, but as I always do when I draw, I don't want to leave this unsolved as it'll bite me later. Thanks!

Please take a look at the three key positions, I want to make this assembly, the blue part is fixed. and I want the lever to be able to move only on the defined paths to complete the initial to final travel.

Does this help?

Thanks!

View attachment 2680View attachment 2681View attachment 2682

 

[PEU]

Here is an animation of the device I want to draw for better understanding.

 

[MintJulep]

Wow. That contraption costs more than my first five cars - combined.

Anyways, your missing constraints are gravity and the lifting force.

 

[PEU]

Yup indeed, a small fortune.

But at least I need to limit the travel to the paths and I can't manage to do that, this should be possible, but I'm failing...

 

[PEU]

Using this video as example I can limit the range on one of the paths

GREAT!

Then I add the second path, and its stuck, the new one doesn't move along it.
BOOO

at least is and advance...

 

[PEU]

Maybe this is related to precision, if the left path is not exactly at top of the path, then the right path cannot move due to be unable to move along the path. I saw the distance and instead of say 50, it was 49.99999978

Is there a way to add some wiggle room to allow the movement?

Thanks

 

[PEU]

solved it, at least simulation wise. Instead of the left axis arc, I made a contour offset of it so it can move along this path having the wiggle room to adjust. Now I can move the lever the way I want within the grooves.