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Harshavardhan1-Visitor
1-Visitor
August 28, 2018
Solved

step file mass correction

  • August 28, 2018
  • 3 replies
  • 5129 views

Hi,

 

I have a supplier step part (attached the snapshot), whose mass is showing up to be 2.4839165e+06 KILOGRAM in creo, which is not in real. 

This part is used in my radiator assembly, and because of its unreal weight, the mass of the radiator is also showing unreal values. around ~200,000 KG. 

 

Now I would like to over ride the value of its weight and I want to tell mass properties in CREO3.0 to take the over ridden value for calculation of the mass. 

 

Can anyone help me how do I do this pls. This is the part which is being used in my radiator assembly. My entire radiator mass is around 450KG.This is the part which is being used in my radiator assembly. My entire radiator mass is around 450KG.

Best answer by dgschaefer

First, in a part this simple, setting the units and density properly should correct it, assuming the geometry accurately represents the physical purchased part.

 

Secondly, you can explicitly set the mass by going to File > Prepare> Model Properties.  In the Model Properties dialog click "Change" next to "Mass Properties".  In the Mass Properties dialog change it from "Geometry and Density" to "Geometry and Parameters" and then enter the Mass in the appropriate box.

 

Capture.JPG

 

 

One thing to keep in mind, however, is that by default Creo will still use the density based mass when a mass properties calculation is done via Analysis > Mass Properties (at least in Creo 2).  You'll need to make sure you select "Assigned" in the Mass Properties dialog.  It defaults to computed.  Any relations that use pro_mp_mass will use the assigned value, however.

 

Capture2.JPG

 

 

 

3 replies

KenFarley
KenFarley21-Topaz II
21-Topaz II
August 28, 2018

Why don't you adjust the density to reflect the real weight of the part? It looks like a single-material part.

The density listed in your picture is an insane 2kg/mm^3.

    S
    23-Emerald III
    StephenW23-Emerald III
    23-Emerald III
    August 28, 2018

    The best way to fix this is to correct the units and the density.

    Go to file - prepare - model properties - unites (change)

    Density is under mass properties (change) in the same window.

    Correct the units first.

    D
    dgschaefer21-Topaz IIAnswer
    21-Topaz II
    August 28, 2018

    First, in a part this simple, setting the units and density properly should correct it, assuming the geometry accurately represents the physical purchased part.

     

    Secondly, you can explicitly set the mass by going to File > Prepare> Model Properties.  In the Model Properties dialog click "Change" next to "Mass Properties".  In the Mass Properties dialog change it from "Geometry and Density" to "Geometry and Parameters" and then enter the Mass in the appropriate box.

     

    Capture.JPG

     

     

    One thing to keep in mind, however, is that by default Creo will still use the density based mass when a mass properties calculation is done via Analysis > Mass Properties (at least in Creo 2).  You'll need to make sure you select "Assigned" in the Mass Properties dialog.  It defaults to computed.  Any relations that use pro_mp_mass will use the assigned value, however.

     

    Capture2.JPG

     

     

     

      H
      Harshavardhan1-VisitorAuthor
      1-Visitor
      August 29, 2018

      Hi @dgschaefer,

       

      Thank you so much. This is what I was looking for. 

       

      Helped me a lot. Smiley Very Happy

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