Solid geometry features that are created after the first solid feature are often referred to as secondary features. They can be created from sketches as extruded and revolved features, or as features with implied shapes (e.e., holes and fillets).
The workflow for creating a sketched secondary feature is similar to that of the first solid feature, but, the following differences and available tools should be noted:
- As an alternative to selecting an Origin Plane as the sketched plane, you can also select planar faces of existing features.
- Existing geometry can be used as constraint and dimension references. Additionally, as you reference design edges while sketching (i.e., dimensioning or offsetting), these edges or vertices are automatically projected into the current sketch.
- When the sketch plane is located in or behind other geometry, you can temporarily remove the portion of the design that is in front of the sketch using the Sketch Palette's Slice option, as shown below.
This is a short excerpt from the Autodesk Fusion 360: Introduction to Parametric Modeling student guide, by ASCENT - Center for Technical Knowledge, an Autodesk Authorized Publisher. For more information, visit https://www.ASCENTed.com.