1. Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Project Lead The Way, Inc.
Copyright 2007

2. Isometric Pictorials Pic-tor-E-al Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Isometric Pictorials
Pic-tor-E-al
Project Lead The Way, Inc.
Copyright 2007

3. Basic Engineering Drawing
1. Freehand Sketch (2D or 3D) talked about already
Pictorial Sketches (3 dimensional)
Isometric – we will learn about this today
Oblique sketch
Perspective
Orthographic Drawing (Multi-view Sketch, Orthographic projection Drawings)
(2 dimensional)

4. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Pictorial Drawing
2D illustration of a 3D object
Provides a realistic view of a 3D object
Shows three faces of an object in one view
Three types of pictorial
Perspective
Isometric
Oblique
Project Lead The Way, Inc.
Copyright 2012 4

5. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Isometric Pictorial
Isometric means equal measure.
Three adjacent faces on a cube will share a single point
Depth – front to back Width – left to right Height – up and down
depth
width
Top
height
Front
Right
Project Lead The Way, Inc.
Copyright 2012 5

6. Pros of Isometric Drawing
Isometric drawing look the “most 3D”
2. Isometric are the most widely used type of pictorial in engineering
A. They are used as the standard type of pictorial
B. They are used in engineering software

7. Give out Isometric PAPER
Find 30, 60, and 120 degree angles on paper and label it

8. 1. Draw a 6 inch cube 2. Label a 30, 60 and 120 degree angle 3
1. Draw a 6 inch cube 2. Label a 30, 60 and 120 degree angle 3. Labe the front, right and top side 4. Label width, depth, and height (together)

9. On your own A. Draw a 4 unit cube.
Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
On your own
A. Draw a 4 unit cube.
Then label front, left, and top view.
Label depth, height and width
Label 120 degree,30 degree, and 60 degree angles
B. Draw a 3 unit cube with shading
C. Draw a rectangular prism with width 4, height 3, and depth 5 units. Shaded
Project Lead The Way, Inc.
Copyright 2007

10. 2. Draw a cube with lengths of 3 units
unit cube label no shading 60 d
Top w
height d
Left
Front
depth
width
2. Draw a cube with lengths of 3 units
3. Draw a rectangular prism with width 4, height 3, and depth 5 units

11. Different sides, different view of object
Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Different sides, different view of object
Top, Front, Right-Side view orientation
Top, Left-Side, Front, view orientation
Project Lead The Way, Inc.
Copyright 2012

12. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
View Selection
Recommendations for how to select the front view
Most natural position or use
Shows best shape and characteristic contours
Longest dimensions
Fewest hidden lines
Most stable and natural position
Project Lead The Way, Inc.
Copyright 2012

13. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Front View Selection
No hidden edges
Best shape
Description
Longest Dimension
Most natural position
BEST FRONT VIEW
Project Lead The Way, Inc.
Copyright 2012

14. Proportion and Estimation
Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Proportion and Estimation
good sketch
Good sketching requires a sense of proportion, and the ability to estimate size, distance, angles, and other spatial relationships.
poor sketch
Project Lead The Way, Inc.
Copyright 2007

15. Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Isometric Sketching
The following examples show the steps used to create isometric sketches of simple geometric objects, along with tonal shading techniques.
Project Lead The Way, Inc.
Copyright 2007

16. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
EXAMPLE 1
Isometric Sketch – beginner
Project Lead The Way, Inc.
Copyright 2012 16

17. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Step 4: Tonal Shading
Decide the light source position, and add tonal shading to two of the three faces.
A shading option is to use parallel lines drawn closely together on a face.
Increase contrast by cross-hatching lines on darkest face.
Project Lead The Way, Inc.
Copyright 2012

18. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Isometric and Oblique Pictorials
EXAMPLE 2
Isometric Sketch - intermediate
Project Lead The Way, Inc.
Copyright 2012 18

19. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Step 4: Tonal Shading
Decide the light source position, and add tonal shading to two of the three faces.
A shading option is to use parallel lines drawn closely together on a face.
Increase contrast by cross-hatching lines on darkest face.
Project Lead The Way, Inc.
Copyright 2012

20. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Isometric and Oblique Pictorials
EXAMPLE 3
Isometric Sketch Cylinder
Project Lead The Way, Inc.
Copyright 2012 20

21. Add tonal shading to curved surface by drawing straight lines between the elliptical faces. Varying the distance between the lines will give the illusion of reflected light.

22. Circles in isometric are elliptical.
Isometric Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Circles in isometric are elliptical.
Project Lead The Way, Inc.
Copyright 2007

23. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Isometric and Oblique Pictorials
EXAMPLE 4
Isometric Sketch Curved Lines
Advanced
Project Lead The Way, Inc.
Copyright 2012 23

24. Chair Start the chair boxy like below using construction lines
Curve the appropriate edges to make it curvy. Darken in object lines.
Add detail and shade 24

26. Isometric Sketch Example
Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Isometric Sketch Example
Project Lead The Way, Inc.
Copyright 2012 26

27. Isometric Sketch Historical Example
Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Isometric Sketch Historical Example
Earl Silas Tupper (1907–1983) invented an air-tight Tupper Seal in 1947
Patent drawings of bowl and cover, 1957 (isometric pictorial)
Project Lead The Way, Inc.
Copyright 2012 27