Dynamic Editing of a Spring

lougallo

With the addition of helix in the last build, I thought it was cool to see a spring dynamically update while editing the cylinder that defines it.  Take a look...


Editing the cylinder and using the Final button allows the entire Part Studio to solve while you make dynamic edits.  Thought I'd share... ~Lou

caradon

OMG. I just found myself doing the exact same thing earlier tonight.
Were you stalking my document?  
Really cool spring behavior, btw. Will this integrate into motion studies too (assemblies)?

Dries

pete_yodis

Reminds me of this....

http://www.deelip.com/?p=1296

lougallo

@DriesV I can't stalk you but geek minds think alike! 

kevin_quigley

@PDY‌ i dont think it is the same. My understanding of the Dassault tech is that it simulates the spring. All Onshpe is doing is updating the driving curves very quickly...a neat trick for sure but not unique.

pete_yodis

@KevinQuigley How is the Dassault tech changing the geometry?  That post was a little old (4 years ago)  - but the tech is affiliated with some of the folks that are here now at Onshape.

lougallo

@KevinQuigley I am not sure about that.  I believe it was also eye candy.  I could find out tho.  In this case I wanted to show how a cylinder definition can update with the model rendered using the final mode.

joe_dunne

Well as the guy who was onstage and who actually did that demo Deelip took pictures of for his blog. I might know a little about it  

Kevin is correct, other products have implemented dynamic springs.  Some do real geometry, some use graphical tricks. However that does not diminish the coolness factor of lou's example.  Onshape is using real geometry. 
 

Joe

coleman

Could you assign mates to the cylinder that defines the spring in an assembly and have the spring dynamically update with the corresponding parts?  I am working on an assembly that contains a spring component.  It would be nice to add the dynamic spring to the assembly.

Thanks 

caradon

Coleman said:

Could you assign mates to the cylinder that defines the spring in an assembly and have the spring dynamically update with the corresponding parts?  I am working on an assembly that contains a spring component.  It would be nice to add the dynamic spring to the assembly.

Thanks 

That is currently not possible. I would think such dynamic springs would require a dedicated, much lighter, more efficient spring command. Sweeps are nice for their flexibility, but are relatively complex to regenerate. However, in my view, dedicated tools are needed for things like springs, molded threads, chains, belts...

Dries

brucebartlett

DriesVervoort_Caradon said:

Crrently not possible. I would think such dynamic springs would require a dedicated, much lighter, more efficient spring command. Sweeps are nice for their flexibility, but are relatively complex to regenerate. However, in my view, dedicated tools are needed for things like springs, molded threads, chains, belts...

Dries

For Sure, I seconded this.

coleman

Roger that....thanks for the reply.

jakub_menoušek

my Onshape documents with dynamic - animated spring
https://youtu.be/7hY7iAkvN2s
https://youtu.be/ZfmIU7kfym0

nicholas_radzykewycz

@jakub_menoušek Links to public documents please? This looks awesome

matthew_stacy

Impressive @jakub_menoušek!  Now kindly show us how to to that.

S1mon

It looks like the "spring" is composed of a bunch of 180 degree pieces, and then each one is mated to the next piece at the end to revolve.

matthew_stacy

That is an astute observation @S1mon.  Revolute-mating half-coil Part instances together appears to be a viable approach.  I was able to combine that approach with an underlying framework of 2 DoF "sliding-revolute" joints to animate a reasonable visual approximation of a coil spring extending and compressing.

• Public Document (animate the "sliding-revoluted_2.0" mate)

I also added mate connectors on the ends of the spring assembly, for mating to other components in higher-level assemblies.

jakub_menoušek

nicholas_radzykewycz said:@jakub_menoušek Links to public documents please? This looks awesome

links to my public documentary are inscribed below the video in the comments on the YT channel

jakub_menoušek

S1mon said:

It looks like the "spring" is composed of a bunch of 180 degree pieces, and then each one is mated to the next piece at the end to revolve.

Yes you're right. But 45 ° parts are better. I use revolute mate and parallel mate, with fixed anchored ends (fastened mate)

jakub_menoušek