Create Reference Frames
Use the Reference Frame tool to define rotating reference frames on solid bodies or surfaces.
- 
                From the Flow ribbon, click the Reference Frame tool.
                

Figure 1. - 
                Select surfaces and/or solids.
                Use the guide bar selectors to filter which entity type you can select.
If the Include bounding surfaces option is active, selecting a solid will automatically select all the corresponding bounding surfaces.
 - Click Axis on the guide bar.
 - 
                Left-click to position the axis of rotation in the modeling window.
                Tip: Use snap points to position the axis on existing points, lines, surface centers, etc.
 - 
                Use the options in the microdialog to further align the
                    axis.
                
- Click 
 to flip the rotation
                        direction. - Click X, Y, or Z to align to the global axes.
 - Click 
 to position the axis
                        using the Vector tool. Once the position is
                        defined, press Esc to return
                        to the current tool. 
 - Click 
 - Enter an angular velocity value (rad/sec) in the text box.
 - 
                Click 
 and select which forces
                    should be considered.
             - 
                From the guide bar, execute the command in the following
                    ways:
                
- Click 
 to confirm your selection and remain in the
                            tool.This allows you to continue creating instances and helps you visualize and edit instances with the legend.
 - Click 
 to confirm your selection and exit the
                        tool. 
 - Click