Flexibility of Patterned Sub Assemblies

BMcGaffey

Hi There, 

I was informed by Onshape support that the flexibility of sub-assemblies is removed once they are patterned. I am looking for an alternative. 

Ideally, if I move one of these camera brackets, the other three will follow. I have tried linking the sub-assembly slider mates with a linear relation in the top-level assembly, but that doesn't seem to work. 



Any ideas on how to achieve this? I would definitely like to keep the sub assembly. I know if I built it all within the top-level assembly and patterned it, the motion would be possible, but this would create a pretty messy BOM. 

NeilCooke

Are they individually assembled rather than patterned? I tried a simple test with a linear relation at the top level and it worked.

MBartlett21

Improvement request here:
https://forum.onshape.com/discussion/10425/patterned-sub-assemblies-to-be-flexible-when-patterned-not-act-as-rigid-bodies/p1

BMcGaffey

NeilCooke said:

Are they individually assembled rather than patterned? I tried a simple test with a linear relation at the top level and it worked.

Hey Neil, thanks for the quick reply! 

I am probably missing something, if I assemble 2 instances of the sub assembly into the top level assembly, then try to add a linear relation between the slider mates in the sub assemblies, it breaks. 


Should I be going about this differently? 

NeilCooke

I can take a look if you want? Share it with me with edit rights - ncooke@onshape.com

BMcGaffey

NeilCooke said:

I can take a look if you want? Share it with me with edit rights - ncooke@onshape.com

Done, thanks! 

NeilCooke

Changed linear relation to "reverse" and it works - not sure why it wouldn't before?

BMcGaffey

NeilCooke said:

Changed linear relation to "reverse" and it works - not sure why it wouldn't before?

I wonder if it has something to do with the limits set on the slider mate? But regardless, thank you for the super swift help. 

Cheers, 

NeilCooke

mechengman said:

NeilCooke said:

Changed linear relation to "reverse" and it works - not sure why it wouldn't before?

I wonder if it has something to do with the limits set on the slider mate? But regardless, thank you for the super swift help. 

Cheers, 

It may well be - we use a different method to solve assemblies with limits. If you don't mind creating a support ticket and sharing that doc with them it would be useful for us to track down what the issue is.