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terje.antonsen
Posts: 46
Registered: ‎01-20-2012
Message 1 of 7 (379 Views)

rigid joint or insert constraint

379 Views, 6 Replies
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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ravikmb5
Posts: 293
Registered: ‎05-30-2009
Message 2 of 7 (359 Views)

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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blair
Posts: 3,964
Registered: ‎11-13-2006
Message 3 of 7 (340 Views)

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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blair
Posts: 3,964
Registered: ‎11-13-2006
Message 4 of 7 (338 Views)

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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Nvidia GTX-690 Classified - 335.23
SpacePilot Pro 3.17.7, 6.17., 4.11
Active Contributor
terje.antonsen
Posts: 46
Registered: ‎01-20-2012
Message 5 of 7 (328 Views)

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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blair
Posts: 3,964
Registered: ‎11-13-2006
Message 6 of 7 (304 Views)

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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t_stramr
Posts: 50
Registered: ‎08-15-2011
Message 7 of 7 (265 Views)

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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