Sketch

1.      Define technical sketching. p. 56

2.      Describe how sketching integrates into the design process. pp. 56-58

3.      Identify and define two types of sketches. pp. 56-57

4.      Create a design sketch using pencil or computer. pp. 58-60

5.      Identify and use sketching tools. pp. 62-68

6.      Use grid paper to create sketches. pp. 70-75

7.      Lay out a sketch using proportions. p. 70

8.      Use sketching to draw lines, circles, arcs, and curves. pp. 65-69

9.   Use various sketching techniques, such as contour and negative space sketching, to improve your sketching technique. pp. 62-65

10.  Describe how sketching is used for constraint-based modeling. pp. 76-80

http://highered.mheducation.com/sites/0072322098/student_view0/index.html

1. Define and describe the uses for technical sketching.

Technical sketching is the process of producing a rough, preliminary drawing representing the main features of a product or structure.  Technical sketches are used extensively in the first (ideation) stage of the design process.  p. 56

2. Define an ideation sketch and explain how it differs from a document sketch.

An ideation sketch is a simplified sketch used to capture a fleeting idea.  A document

sketch may follow some or all of the conventions of a more formal mechanical drawing. pp. 56-7

3. List the four types of sketches, grouped by projection method. Sketch an example of each type.

Multiview, isometric, oblique, perspective. The last three are all pictorial sketches. p. 58

4. Describe the major differences between parallel and perspective projection.

Perspective sketches are more realistic, but harder to draw properly. Parallel projection is used in multiview, isometric, and oblique sketches. p. 58

5. Define multiview drawing and make a sketch of one.

Multiview sketches present the object in a series of projections, each one showing only two of the object’s three dimensions. p. 58

6. Define principal view.

The view that most clearly describes the features of the object. From this view, additional multiview projections are generated.  (Chap 5)

7. Describe the precedence of lines.

Different lines represent different types of features on a drawing. If two types of lines overlap, certain types of lines take precedence. The order of precedence is: visible -> hidden -> center.  (Chap 5)