|
|
| Menu location |
|---|
| Tools → Mass Properties |
| Workbenches |
| All |
| Default shortcut |
| None |
| Introduced in version |
| 1.2 |
| See also |
| Std Measure |
Description
The Std MassProperties command starts the mass properties measurement feature. It provides the following information:
- Physical Properties
- Volume
- Mass
- Density
- Surface area
- Center of gravity
- Center of volume
- Inertia
- Inertia matrix
- Principal moments of inertia
- Inertia around axis - replaces the aforementioned inertia measures if a datum line is used as a reference for inertia calculations
The task panel of the command
Usage
- Optionally preselect the solids to be measured.
- There are several ways to invoke the command:
- Press the
Mass Properties button. - Select the Tools → Mass Properties option from the menu.
- Press the
- A task panel opens. See Options for more information.
- If no solids were preselected, select them in the 3D View or Tree View.
- Press the Reset button to clear the measurement or the Save button to keep it. Saved measurements are put in a Measurements group in the Tree View.
- Press Esc or the Close button to finish the command.
Options
- Reference:
- Center of gravity - use the center of gravity as a reference to compute inertia.
- Custom - press the Select… button and pick the reference - datum line or local coordinate system.
- Unit system:
- mm, kg, kg*mm^2
- m, kg, kg*m^2
- in, lb, lb*in^2
- ft, lb, lb*ft^2
- Create Datum Point button in the Center of Gravity or Center of Volume section - creates a datum point at this location.
- Create Principal Axes LCS in the Inertia section - creates the corresponding local coordinate system.
This page is retrieved from https://wiki.freecad.org/Std_MassProperties