Assembly won't move into place with a second mate. Both mates become corrupted.

robert_hill789

Hi. I'm having trouble with assembling two pentagons together along beveled edges. My intension is create a dodecahedron. I am able to create a mate and the two parts move into position. When I put in a second mate, however it ignores the first mate and moves to correspond to the second mate. This also corrupts both the first and second mates. I'm wondering if it's because the edges of the pentagons are not planner to x, y or z axes. I've tried a number of mate types and a number of part features. The first mate works fine. I haven't seen any tutorial or discussion regarding this. I must be missing something. Thank you, 

robert_scott_jr_

Robert, please post a link to your document. - Scotty

martin_kopplow

A link to the document would sure help. When building a dodecaedron, however, the only mate conditions possible to be applied at the faces corners appear to be ball joints.

Works for me, in principle:

https://cad.onshape.com/documents/65e9b0a5e718185314d7b9da/w/f9c28da6e08862799855186e/e/f6a6edb2fb20cb95520dd988?renderMode=0&uiState=657de920ff54382bd63904c4

My pentagons are flat surfaces, though. The bevels might do someting to the edge lenghts, and cause inconsitencies. It might be important to keep the basic pentagon edges from the sketch unmodified in the model until the end.

robert_hill789

Thanks for your response. I've included a link to my work below. 
I was able to mate two pentagons by making certain that they shared the same plane. Then I used a circular assembly to complete half of a dodecahedron. However, I can't put two halves together. It appears that the parts don't want to mate if they require a scalene movement. If that makes any sense.
Stepping back, this link is two simple pentagons that won't mate. Thank you, again.

https://cad.onshape.com/documents/3f58ad8962075f836537a73d/w/9586b19ae941d1874ba5f796/e/5b29b7551c8dad940397718c

glen_dewsbury

The link is not a shared document and does not view. You can share with public access if others are to see.

martin_kopplow

Unfortunately, the link is not leading to the document, but a dodecaedron should be feasible by ONLY constrainig (mating) the corners points in relative position, NOT angle. Every other geometry introduced is not necessary at all and will rather lead to problems.

michael3424

robert_hill789 said:

Thanks for your response. I've included a link to my work below. 
I was able to mate two pentagons by making certain that they shared the same plane. Then I used a circular assembly to complete half of a dodecahedron. However, I can't put two halves together. It appears that the parts don't want to mate if they require a scalene movement. If that makes any sense.
Stepping back, this link is two simple pentagons that won't mate. Thank you, again.

https://cad.onshape.com/documents/3f58ad8962075f836537a73d/w/9586b19ae941d1874ba5f796/e/5b29b7551c8dad940397718c

Make sure you follow the instructions here to share your document publically with others.

https://forum.onshape.com/discussion/9107/forum-post-checklist-read-this-first#latest

In particular, note the requirement to make it a "Public Document"

steve_shubin

Not all pentagons here
And no bevels
But maybe this will help some being as it is using rounded panels and not ones that are purely flat as appears to be your case with the bevel
For the record — the method to make the panels rounded as shown in the part studio, was something I saw @john_mcclary do, which I thought was pretty slick

https://cad.onshape.com/documents/0fed597386a938c7773d8bd8/w/cbf9d9ba85fbc8c27697a806/e/0efb3c074ab9b559cf288650