Sketching

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
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Technical Illustration
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Sketching Materials

• Paper
• Pencil
• Soft lead

• Optional
• Eraser
• Grid Paper

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Sketching Technique

• Proportion
• Clarity
• Sketching Aids

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Sketching Lines

• Vertical lines
• Top to bottom
• Long straight lines
• Series of short straight lines

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Sketching Circles Arcs

• Begin by lightly constructing a square

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Sketching Angles

• Begin with 90 angle

60
45
30
Subdivide once
Subdivide twice
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Sketching Assignment
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Sketching

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

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Sketching

• Types of Sketches
• Single-view
• Multi-view
• Pictorials

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Single-view Sketching

• Technical purposes
• Front view
• Most descriptive features

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Steps for Single-view Sketching
Step 2
Step 1
Step 3
Step 4
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Multi-view Sketching

• Technical sketch
• Front view
• Top view
• Side view

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Multi-view Sketch
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Single-view/Multiview Sketch Assignment
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Pictorial Sketches

• Quickly communicate an idea
• Three dimensions in one view
• Width
• Height
• Depth

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Pictorial Sketches

• Three (3) types
• Isometric
• Oblique
• Perspective

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Isometric Sketch
HEIGHT
WIDTH
DEPTH
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Isometric Sketching

• Three equally spaced axes of 120

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Isometric Sketching

• Receding lines
• Typically 30 off horizontal

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Isometric Sketching

• Circular shapes appear as ellipses

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Isometric Ellipses

• Correct ellipse orientation

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Isometric Sketching

• Non-Isometric lines
• Locate endpoints and connect

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Isometric Sketching Assignment
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Oblique Sketch
HEIGHT
DEPTH
WIDTH
30
Oblique Sketching

• Front view is drawn true shape and size

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Oblique Sketching

• Receding edges are usually drawn at an angle of
  30, 45, or 60

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Oblique Sketching

• Circles and curves drawn on frontal plane will
  appear true shape and size

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Oblique Sketching Assignment
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Perspective Sketches
2-Point Perspective
1-Point Perspective
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Perspective Sketches

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

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Perspective Sketching Assignment