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Sketching

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Sketching

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Sketching

  1. 1. Sketching CADD I Unit 1
  2. 2. What is a sketch? • In the most basic sense, a sketch is a drawing that is done quickly, without great detail and with only pencil and paper. • The advantage of sketching: since only a few materials are needed, sketches maybe done anywhere.
  3. 3. Materials Used • Paper used includes: • plain paper or newsprint • graph paper to help maintain proportion and scale • Tracing paper • Pencils and erasers • Do not use drawing tools
  4. 4. More on sketching • Good sketching techniques are used to capture initial ideas. • In addition, they are used to refine ideas and communicated technical information. • 5 basic, visual symbols are used • There are nine reasons to sketch • There are 5 types of sketches
  5. 5. 5 Basic, Visual Symbols • Point: symbol that is used to describe a location in space • Line: path between 2 points • Surface: flat or non-flat element created from curved lines • Plane: a flat surface • Texture: Surface quality
  6. 6. Reasons to Sketch 1. Persuade people who make decisions 2. Develop a refined sketch of a proposal 3. To clarify a complicated idea 4. To give design idea to drafters 5. To develop a series of ideas for refining a new product or part.
  7. 7. Reasons to Sketch 6. To analyze or develop best methods and materials for a part 7. Record permanently a design improvement on a part that already exists 8. To show that there are many ways to look at or solve a problem 9. To spend less time on drawing
  8. 8. Types of Sketches • The type of sketch to be used depends on the purpose of the sketch and on the intended lifespan of it. • The sketcher needs to take in to consideration who will be using the drawing and for how long the drawing will be used.
  9. 9. Rough Sketches • Drawn quickly using jagged lines • Primary purpose is to express ideas or thought quickly • Tools are not used • Attention is focused on proportion • Notes or labels are added as needed
  10. 10. Refined Sketches • Drawn more carefully than a rough sketch • Have better line quality than a rough sketch • Better proportion • Use basic tools such as straight edges and templates
  11. 11. Presentation Sketches • More refined than a refined sketch • Used to convince management or clients to accept or approve ideas • Usually shown in an eye-appealing 3- dimensional view to appeal to non-technical people
  12. 12. Temporary Sketches • Done to solve an immediate problem • Usually thrown away when no longer needed
  13. 13. Permanent Sketches • Usually kept as part of the record (legal document) • Attached to files or memos
  14. 14. Overlays • An overlay is a piece of translucent paper used to trace over drawings • Has three primary purposes: 1. Reshaping an idea 2. Refining a drawing without really changing it 3. Add various options to a basic drawing
  15. 15. Terms to Know • Visualize: To picture in the mind’s eye what something looks like • Implementation: To draw or create an object after it has been visualized Ed visualized how to fix the stairs and then implemented his plan.

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