Inventor General Discussion

Inventor General Discussion

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Valued Contributor
petrxn
Posts: 91
Registered: ‎03-22-2007
Message 11 of 15 (297 Views)

Re: Negative mass calculation in Inventor 2013

12-02-2012 01:09 PM in reply to: thomas.hauglien

Sorry, but it's not possible. Try to set density to zero in material editor, it will change to 0.001. See enclosed picture.

Employee
yuhanzhang
Posts: 477
Registered: ‎01-06-2009
Message 12 of 15 (282 Views)

Re: Negative mass calculation in Inventor 2013

12-02-2012 10:58 PM in reply to: thomas.hauglien

Hi Thomas,

 

The change is because of the Protein(Autodesk Material Library) introduced into Inventor 2013, which can be shared with multiple Autodesk products, but if you now only use Inventor and want to take use of the legacy materials you can just uninstall the Protein, and then try to use the legacy materials which allows to set negative density.



Rocky Zhang
Inventor API
Manufacturing Solutions
Autodesk, Inc.

Employee
yuhanzhang
Posts: 477
Registered: ‎01-06-2009
Message 13 of 15 (275 Views)

Re: Negative mass calculation in Inventor 2013

12-03-2012 12:05 AM in reply to: petrxn

I double checked, you're right, the density has limits, if you input a value is out of lower/higher range, it will just use the lower/higher value instead, and the lower value is positive.  And so if you need to calculate mass with zero value I think you can try to override the mass.



Rocky Zhang
Inventor API
Manufacturing Solutions
Autodesk, Inc.

Valued Contributor
petrxn
Posts: 91
Registered: ‎03-22-2007
Message 14 of 15 (255 Views)

Re: Negative mass calculation in Inventor 2013

12-03-2012 05:22 AM in reply to: petrxn

Thanks, of course this is possible, but this is not real solution. I think that if we have material catalogue and there properties of materials we should use it. There is a lot of ways how to solve this new behaviour, problem is that Autodesk does not document these changes and nobody of designers can belive that model which was correct in summer is correct in winter (because zero is not zero). And this is what is the matter.

Employee
Allen.Bai
Posts: 15
Registered: ‎05-18-2008
Message 15 of 15 (102 Views)

Re: Negative mass calculation in Inventor 2013

10-31-2013 06:58 PM in reply to: petrxn

Thanks for your reporting it. btw, do you think a large range is needed or we don't have any range?

Allen Bai
Senior User Experience Designer
Design, Lifecycle & Simulation
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