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

2. Oblique Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Oblique Pictorials
An Oblique pictorial starts with a straight-on view of one of the object’s faces, which is often the front face.
Angled, parallel lines are drawn to one side to represent the object’s depth. Common oblique angles include 30°, 45°, and 60°.
45°
Project Lead The Way, Inc.
Copyright 2007

3. Types of Oblique Drawings
Oblique Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Types of Oblique Drawings
There are two types of oblique pictorials: cavalier and cabinet. The difference between the two is based on how the depth of the object is represented.
This slide is for informational purposes so the student is aware that there are different types.
Oblique Cavalier
Oblique Cabinet
Project Lead The Way, Inc.
Copyright 2007

4. Types of Oblique Drawings
Oblique Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Types of Oblique Drawings
Oblique Cavalier
Oblique Cabinet
The difference in the two is the depth of the object.
Project Lead The Way, Inc.
Copyright 2007

5. Oblique Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
General Oblique
A general oblique is a type of oblique pictorial that represents an object’s width and height, but the depth can be any size and drawn at any angle.
The idea is to worry about getting the thought down as a sketch not worrying about the depth or angle.
This is the oblique the students will be drawing. This will allow students to draw the sketch or thought they have and not worry about getting the angle or depth exact.
Project Lead The Way, Inc.
Copyright 2007

6. Oblique Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
The Box Method
The box method is a sketching technique that is used to maintain proportionality. It starts with the sketcher envisioning an object contained within an imaginary box.
Project Lead The Way, Inc.
Copyright 2007

7. Oblique Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Oblique Sketches
Step #1: Layout the box within which the oblique view will occur using points and construction lines.
Project Lead The Way, Inc.
Copyright 2007

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

9. Oblique Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Oblique Sketches
Step #2: Use points and construction lines to identify edges that occur on the surface of the box.
Project Lead The Way, Inc.
Copyright 2007

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

11. Oblique Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Oblique Sketches
Step #3: Trace out the visible edges of the part with thick, dark object lines.
Project Lead The Way, Inc.
Copyright 2007

12. Find your drawings on my desk and take a seat.

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

14. Oblique Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Oblique Sketches
Step #4: Use points and construction lines to identify edges that occur on the surface of the box.
Project Lead The Way, Inc.
Copyright 2007

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

16. Oblique Sketches Step #5: Trace out the visible edges of the
Oblique Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Oblique Sketches
Step #5: Trace out the visible edges of the
part with thick, dark object lines.
Project Lead The Way, Inc.
Copyright 2007

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

18. Oblique Pictorials
Introduction to Engineering DesignTM
Unit 1 – Lesson 1.2 – Intro to Technical Sketching
Tonal Shading
Add tonal shading to two of the three views by drawing parallel lines spaced closely together.
Increase the contrast by cross-hatching the lines on the darkest face.
Tonal shading is a nice feature to use to enhance your sketch.
Project Lead The Way, Inc.
Copyright 2007