CADLine  Mass Properties tab
Terminology: , ,
To calculate Forces correctly, it is important that the Mass Properties of each Part are correct.
Use the in the CADLine dialogbox  Mass Properties tab to:
•  Import mass properties from the active SOLIDWORKS document 
•  Use the 'User Mass Properties' separator to specify other Mass Properties. 
Mass Properties include:
•  Position of the CentreofMass [mm] 
•  MomentofInertia (at it CentreofMass), or 
•  OR defined as a Mass[kg] and RadiusofGyration[mm] = [kg.m2] 
All mass properties are coplanar with the .
Note: The massproperties of Profile and Extrusions elements are also added to the total massproperties in this dialog.
Mass Properties tab

Separators:


User Mass Properties

Mass : [kg]

CentreofMass X–axis [mm] relative to the Origin CADLine's coordinatesystem.

CentreofMass: Y–axis [mm] relative to the Origin and CADLine coordinatesystem.

RadiusofGyration* [mm]

or
MomentofInertia* [kg.m2] [NOT kg.mm2 ]
Units of 'kilogram.metres2.'


Notes: *
If you do not enter a Radius of Gyration OR a Moment of Inertia, then the Mass is a 'Point Mass' at a distance defined by the X and Yaxis coordinate values.
If you do enter a Radius of Gyration or Moment of Inertia, then the PointMass becomes a mass with a real mass distribution in the body.
The same Mass applies at the X and Yaxis coordinates, but now the body has an Inertia about the centre of Mass and a corresponding Radius of Gyration.

MechDesigner uses the Parallel Axis Theorem to calculate the MomentofInertia about the Part's Origin.
After you have entered the mass of the Part, then:
If you enter 'MomentofInertia', then MechDesigner calculates the 'RadiusofGyration'
If you enter 'RadiusofGyration', then MechDesigner calculates the 'MomentofInertia'

SolidWorks Mass Properties

Usually, the MassProperties will show after you import a SolidWorks document. However, you may want to update the Mass Properties to those of the active document in SolidWorks.
button
MechDesigner imports the Mass Properties of the active document in SolidWorks, as ReadOnly values:

•  CentreofMass : Xaxis: [mm] 
Coordinates along the X–axis of the CADLine.

•  CentreofMass Yaxis [mm] 
Coordinates along the Y–axis of the CADLine.

•  MomentofInertia (CoG) [kg.m2] 

MechDesigner uses the Parallel Axis Theorem to calculate the MomentofInertia about the Part's Origin.
button
When you do not want to use the Mass Properties of the active document in SolidWorks , then:
1.  Click the button to set the MassProperties to zero[0]. 

Total Mass Properties

The Total Mass Properties includes masses from other CADLines in addition to those defined for this CADLine.
ParallelAxis Theorem
Inertia about Part's Origin = Inertia about CentreofMass + Mass × (Distance to Part's Origin)2
Relationship between MomentofInertia and Radius of Gyration
MomentofInertia(about CenterofMass) = Mass×(RadiusofGyration)2
Total Mass of Part =
Mass of Extrusion + Mass from SolidWorks Mass Properties + User Mass Properties + Total mass of other CADLines in the same Part.
Total MomentofInertia about the Part's Origin =
Inertia of Extrusion + Inertia from SolidWorks Mass Properties + User Inertia Properties + Total Inertia of other CADLines in the same Part.

