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Sketching

Sketching. 2.00 Explain and demonstrate basic sketching skills and techniques. Sketching Concepts. 2.01 Explain the concepts related to sketching. Purpose of a Sketch. Quickly & easily get an idea on paper Design sketches Freehand technical sketches Technical illustrations.

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Sketching

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  1. Sketching 2.00 Explain and demonstrate basic sketching skills and techniques.

  2. Sketching Concepts 2.01 Explain the concepts related to sketching.

  3. Purpose of a Sketch • Quickly & easily get an idea on paper • Design sketches • Freehand technical sketches • Technical illustrations

  4. Freehand Technical Sketch

  5. Design Sketch

  6. Technical Illustration

  7. Paper Pencil Soft lead Optional Eraser Grid Paper Sketching Materials

  8. Sketching Technique • Proportion • Clarity • Sketching Aids

  9. Sketching Lines • Vertical lines • Top to bottom • Long straight lines • Series of short straight lines

  10. Sketching Circles & Arcs • Begin by lightly constructing a square

  11. Sketching Angles • Begin with 90°angle 45° 60° 30° Subdivide once Subdivide twice

  12. Sketching Assignment

  13. Sketching 2.02 Explain the concepts and principles underlying isometric, oblique and multiview sketching.

  14. Sketching • Types of Sketches • Single-view • Multi-view • Pictorials

  15. Single-view Sketching • Technical purposes • Front view • Most descriptive features

  16. Object Steps for Single-view Sketching Step 2 Step 1 Step 3 Step 4

  17. Multi-view Sketching • Technical sketch • Front view • Top view • Side view

  18. TOP VIEW FRONT VIEW R. SIDE VIEW Multi-view Sketch

  19. Single-view/Multiview Sketch Assignment

  20. Pictorial Sketches • Quickly communicate an idea • Three dimensions in one view • Width • Height • Depth

  21. Pictorial Sketches • Three (3) types • Isometric 120 between xyz • Oblique 90 between xy • Perspective vanishing points

  22. Isometric Sketch HEIGHT WIDTH DEPTH

  23. Isometric Sketching • Three equally spaced axes of 120°

  24. Isometric Sketching • Receding lines • Typically 30° off horizontal

  25. Isometric Sketching • Circular shapes appear as ellipses

  26. Isometric Ellipses • Correct ellipse orientation

  27. Isometric Sketching • Non-Isometric lines • Locate endpoints and connect

  28. Isometric Sketching Assignment

  29. Oblique Sketch HEIGHT DEPTH WIDTH

  30. Oblique Sketching • Front view is drawn true shape and size

  31. Oblique Sketching • Receding edges are usually drawn at an angle of 30°, 45°, or 60°

  32. Oblique Sketching • Circles and curves drawn on frontal plane will appear true shape and size

  33. Oblique Sketching Assignment

  34. Perspective Sketches 1-Point Perspective 2-Point Perspective

  35. Perspective Sketches • Objects appear as the eye would see them • Most realistic type of pictorial sketch • Most difficult pictorial sketch to draw

  36. Perspective Sketching Assignment

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