Sketching by gR1AvP38

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									                          Career &
                          Technical
Sketching


2.00
Explain and demonstrate basic
sketching skills and techniques.
                          Career &
                          Technical
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
Freehand Technical Sketch
Design Sketch
Technical Illustration
Sketching Materials

   Paper
   Pencil             Optional
       Soft lead        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
    45°              60°


                           30°




Subdivide once   Subdivide twice
Sketching Assignment
                          Career &
                          Technical
Sketching


2.02
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 3           Step 4
Multi-view Sketching

   Technical sketch
       Front view
       Top view
       Side view
Multi-view Sketch




     TOP VIEW




    FRONT VIEW      R. SIDE VIEW
Single-view/Multiview Sketch Assignment
Pictorial Sketches

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

   Three (3) types
       Isometric
       Oblique
       Perspective
Isometric Sketch
   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
Oblique Sketch

     HEIGHT




              WIDTH
    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
   Perspective Sketches




1-Point Perspective   2-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

								
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