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Inventor General Discussion

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Post 1 of 7

rigid joint or insert constraint

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12-16-2013 04:34 AM

Couldn't find by searching, so I hope a new topic is OK. I suspect this has a short answer.

 

We don't use the content center, so All our rivets etc. are in a linked library. I have an assy with 100 rivets. 

Is the best practice to use the rigid joint now? Have previously used insert constrain. the difference is that the rivet doesn't rotate with joint. 

with constrain, it rotates, but cannot be seen, unless I use a textured appearance.

 

Are there advantages to loading and processing the model with rigid, as it doesn't rotate?

 

The odds for this model to ever enter dynamic simulation is low.

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Post 2 of 7

Re: rigid joint or insert constraint

12-16-2013 06:30 AM in reply to: terje.antonsen

Are you using imates 

if yes 

imates still wont support joints

 

12-16-2013 7-47-01 PM.png

 

 

 

if no 

rigid joints are much easier

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Ravi Kumar MB,
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Post 3 of 7

Re: rigid joint or insert constraint

12-16-2013 08:57 AM in reply to: ravikmb5
You do have the option to use the Joint with Rotate if that is what you want or Joint Rigid without rotation.
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Re: rigid joint or insert constraint

12-16-2013 09:00 AM in reply to: blair
You can use either one, Joints or Constraints. It really doesn't make a difference to the model or if you will be using Dynamic-Sim or not. It's just another tool in your assembly environment. It really comes down to what works best for you.
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IV2015 SP1-ud2 PDSU / Sim Mech 2015 r1 /
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EVGA X79 - Classified, iCore7 3930k 32Gb Quad-Channel
950Gb (2 x 500Gb Sata III SSD RAID0 Adaptec 6805E Controller)
Nvidia GTX-980 Classified - 347.09
SpacePilot Pro 10.2.0 / 17.2.0.11011 / 4.17
Delta Tau Chi ΔΤΧ
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Re: rigid joint or insert constraint

12-16-2013 09:49 AM in reply to: terje.antonsen
If a part is insert constrained to another and I click and drag on one of them, will it be more easily computable with a rigid joint, as nothing rotates?
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Post 6 of 7

Re: rigid joint or insert constraint

12-16-2013 09:59 PM in reply to: terje.antonsen

As you reduce degrees of freedom the model seems to respond faster, at least to me.

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Post 7 of 7

Re: rigid joint or insert constraint

12-18-2013 05:11 AM in reply to: terje.antonsen

Hi Terje,

 

You can understand joints as next step in constraints evolution. Lets say joints are "smarter" constraints. Each joint is constraining two origins where each origin represents a coordinate system defined by pick point, Gap direction(Z axis) and Alignment selection(X axis). Y axis can be easily calculated by right hand rule from Z and X. Joint provides more precise control over positioning of constrained instances.

For your case, Insert constraint can be replaced by Rotational joint which allows rotation around Z axis like an Insert. Rotational joint additonally provides control over rotation angle which can be measured or limited based on Alignment direction. You can specify angular data on Limits tab of Joint dialog box.

 

Robert

 

Joint1.png

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