Subassembly non-fastened mates not working in higher assembly

travis_lundy

I have a subassembly with a revolute mate which has limits of +/- 45deg defined (see animated gif). When this is inserted in a higher level assembly, all of the limits are no longer viable and everything acts like a fastened mate in whatever the last position was when the version was created. Is this expected behavior? Does anyone else think positional limits should still apply in higher level assemblies?



Revolute mate shown in higher assembly but does not apply limits:

travis_lundy

@MichaelPascoe, I believe I answered my own question. I can't share this particular model but I did some troubleshooting and I had a linear part pattern of that assembly. When I suppress the pattern of that assembly and place each assembly individually, the revolute degrees of freedom come back. This fixes my current issue but makes me wonder if someone needs to do a pattern of assemblies with many items and needed this ability to adjust the degrees of freedom, a pattern would break that. Good to know.

 

MichaelPascoe

Hi Travis, this is not normal. Would you provide a link to your document or a copied portion of it? This will help us troubleshoot for you.

travis_lundy

@MichaelPascoe, I believe I answered my own question. I can't share this particular model but I did some troubleshooting and I had a linear part pattern of that assembly. When I suppress the pattern of that assembly and place each assembly individually, the revolute degrees of freedom come back. This fixes my current issue but makes me wonder if someone needs to do a pattern of assemblies with many items and needed this ability to adjust the degrees of freedom, a pattern would break that. Good to know.

 

MichaelPascoe

Glad it is working for you!

spencer_salisbury

I know this is old, but I just ran into the same issue. Example here:

https://cad.onshape.com/documents/b2f4eb50eb60a36ee859cca7/w/89765e7c8fc418d9cf4072d6/e/76d0a1abab255dbea3433163

It's a configurable drawer cabinet that uses linear pattern to replicate the drawers. If the linear pattern is suppressed then the one drawer can animate in and out. If it is unsuppressed, all drawers are fastened in place.

martin_kopplow

To me, this appears kind of logical: If they have a pattern relationship, moving only one would break the realtionship. If one wanted to move them all together, they should be a pattern in a subassembly that moves/animates on one single linear degree of freedom. If all are to be moved independently, they all need their individual definition, so their offset can be different values under the hood.

wayne_sauder

For most of these applications, I prefer to use the replicate tool. This gives the individual definition. I try to limit patterns to objects that have no degree of freedom.