<< Click to Display Table of Contents >> Navigation: MechDesigner Reference & User Interface > DialogBoxes > > Mass Properties tab 
See also : CADLine dialogbox
Use the MassProperties tab
•Enter userdefined mass properties  see below
•Import from SolidWorks the massproperties of a SolidWorks document  see below
•Review the total MassProperties on the Part  see below
CADLine dialogbox > Mass. Properties tab


MomentofInertia: RadiusofGyration, and PointMass. Case 1: If you enter a Mass but do NOT enter a RadiusofGyration or MomentofInertia, the Mass is reduced to a Point Mass. The position of the mass is at (centerofMass: X–axis, centerofMass: Y–axis). CASE 2: If you enter MomentofInertia, then the equivalent RadiusofGyration, is :
Case 3: If you enter RadiusofGyration, then the equivalent MomentofInertia, is:
Parallel Axis Theorem We use the Parallel Axis Theorem to calculate the MomentofInertia about the Part's instantaneous centerofrotation.
= distance to the CenterofMass from the centerofrotation. 
When you import a SolidWorks document onto a CADLine, you can also import the SolidWorks MassProperties 

Button IMPORT / UPDATE SolidWorks Mass Properties Note: Before you click button , make sure the active SolidWorks document is on the CADLine.
Button Remove SolidWorks Mass Properties 
Total Mass Properties: The Total Mass Properties is for ALL CADLines in one Part. EXPLICITLY: the Total Mass Properties include, for each Part, ALL of those: •Mass and MassProperties as calculated for ALL Profile/Extrusions in the Part •User MassProperties as defined for ALL CADLines in the Part •SolidWorks MassProperties as defined for ALL CADLines in the Part 

NOTES: ParallelAxis Theorem Inertia about Part's RotationalAxis = Total Inertia about centerofMass + Mass × (Distance to Part's RotationalAxis)2 Relationship between MomentofInertia and Radius of Gyration Total Inertia (about centerofMass) = Total Mass × (RadiusofGyration)2 Total Mass of Part = Mass of all Extrusions + Total mass of other CADLines in the same Part Total Inertia about the Part's centerofGravity = Inertia of all Extrusions + Total Inertia of other CADLines in the same Part 