About the 3D Object
This topic discusses the following concepts:
In a Volume Helical Sweep feature, you create a 3D object by sketching or selecting a sketch, and the system revolves it 360° around an axis of revolution.
Showing the 3D object
When the Helix and Orientation 3D object dragger is shown, you can also show the 3D object by clicking 3D Object. You cannot show the 3D object without showing the dragger.
Section requirements for 3D objects
These are the requirements for a section so that the system can revolve it to create a 3D object:
Contain a line along the y-axis, that serves as the axis of revolution of the 3D object. The y-axis is colored green in the 3D object dragger, and when the Sketch tab is open
Lie on one side of the y-axis
Contain only lines and circular arcs
Closed
Convex
The 3D object that results from revolving the section about the y-axis must be convex
Examples:
The following section is valid for creating a 3D object. It is convex, and revolving it creates a convex object:
The following section is not valid because though the sketch is convex, the 3D object that results when you revolve it is not convex:
The following section is not valid because it is not convex: