To master feature-based modeling, you should be able to answer three fundamental questions:
What are the available features that a CAD/CAM system offers for modeling parts?
What is the input required to create each feature?
Which feature should you use for a given modeling problem?
Section 4.1 and Figure 4.1 provide the answer to the first question. Table 4.1 answers the other two questions. It shows a simple basic example of each feature. Keep in mind that the third question may have multiple answers; one of them is always the best answer. For example, you may use a loft or a sweep. However, if a part has a constant cross section along a curve, sweep is better to use because it requires fewer steps to create the part. If the part has a variable cross section, a loft is better to use. The tutorials in this chapter provide some modeling examples.
The other features shown in Figure 4.1 and not covered in Table 4.1 are covered in the tutorials in this chapter.