Chapter 1 Introduction to Autodesk Inventor - Goodheart-Willcox

Figure 1-8.
This warning appears when you try to add a dimension that causes an over-constrained situation.
Figure 1-9.
This simple sketch
has two dimensions
that control the
object’s size.
This dimension
is not needed
base feature is produced as a sketched feature. Ribs, embossments, and some holes
are also sketched features. See Figure 1-10.
Placed Features
Placed features include shells, fillets, chamfers, threads, and face drafts. See
Figure 1-11. Generating placed features requires adding size dimensions and selecting
a location, such as a point or edge.
base feature: The
initial model feature,
on which all others
are based.
placed features:
Features added to
an existing feature
without using a
sketch.
Chapter 1 Introduction to Autodesk Inventor 7
work features:
Reference or
construction
features that direct
the location and
arrangement of
other features.
Figure 1-10.
These sketched features are added to the base feature.
Extruded sketched
features
Figure 1-11.
Threads, fillets,
and chamfers are
a few of the placed
features available in
Inventor.
Work Features
Embossment created from
text on a sketch
Fillet
Work features are used for construction and reference purposes. They serve as a
basis for creating part geometry and features in areas where no other geometry is available.
Work features include work planes, work axes, and work points. See Figure 1-12.
Work features may be placed anywhere on a feature or in 3D space. Like other features,
work features are parametrically associated with a model.
8 Inventor and Its Applications 2009
Rib
Threads
Base feature
Chamfer