Career & Technical Education Sketching Explain and demonstrate basic sketching skills and techniques.

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Presentation transcript:

Career & Technical Education Sketching Explain and demonstrate basic sketching skills and techniques.

Career & Technical Education Sketching Concepts Explain the concepts related to sketching.

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

Freehand Technical Sketch

Design Sketch

Technical Illustration

Sketching Materials Paper Pencil  Soft lead Optional  Eraser  Grid Paper

Sketching Technique Proportion Clarity Sketching Aids

Sketching Lines Vertical lines  Top to bottom Long straight lines  Series of short straight lines

Sketching Circles & Arcs Begin by lightly constructing a square

Sketching Angles Begin with 90 ° angle 60 ° 30 ° 45 ° Subdivide onceSubdivide twice

Sketching Assignment Sketch 6 circles as shown on PPT Sketch 4 cubes Turn into me for a grade when finished

Career & Technical Education Sketching Explain the concepts and principles underlying isometric, oblique and multiview sketching.

Sketching Types of Sketches  Single-view  Multi-view  Pictorials

Single-view Sketching Technical purposes Front view  Most descriptive features

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

Multi-view Sketching Technical sketch  Front view  Top view  Side view

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

Single-view/Multiview Sketch Assignment Sketch a multiview as shown on PPT of the object I will display for you – I will pass the object around as needed

Pictorial Sketches Quickly communicate an idea Three dimensions in one view  Width  Height  Depth

Pictorial Sketches Three (3) types  Isometric  Oblique  Perspective

Isometric Sketch WIDTH DEPTH HEIGHT

Isometric Sketching Three equally spaced axes of 120 °

Isometric Sketching Receding lines  Typically 30° off horizontal

Isometric Sketching Circular shapes appear as ellipses

Isometric Ellipses Correct ellipse orientation

Isometric Sketching Non-Isometric lines  Locate endpoints and connect

Isometric Sketching Assignment Draw a simple isometric sketch of the same object used for the last multiview assignment

Oblique Sketch WIDTH DEPTH HEIGHT

Oblique Sketching Front view is drawn true shape and size

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

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

Oblique Sketching Assignment Now draw an Oblique sketch of the same object

Perspective Sketches 2-Point Perspective1-Point Perspective

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

Perspective Sketching Assignment Now draw a one point perspective of the object