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Oblique and Isometric Drawings GSMST. Review Learning Objectives Sketch pictorials of an object (either oblique or isometric) given orthographic views.

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Presentation on theme: "Oblique and Isometric Drawings GSMST. Review Learning Objectives Sketch pictorials of an object (either oblique or isometric) given orthographic views."— Presentation transcript:

1 Oblique and Isometric Drawings GSMST

2 Review Learning Objectives Sketch pictorials of an object (either oblique or isometric) given orthographic views of the object Select the best orientation of an object shown in pictorial Define what makes a drawing a: cavalier oblique, cabinet oblique, isometric, axonometric, perspective, or orthographic views

3 Pictorial A three dimensional pictorial is a drawing that shows an objects three principal planes, much as they would be captured by a camera Sometimes they are called Technical Illustrations

4 Types Obliques Cavalier Cabinet Axonometrics Isometrics Others Perspectives

5 Types Obliques Cavalier Cabinet Axonometrics Isometrics Others Perspectives

6 Types Obliques Cavalier Cabinet Axonometrics Isometrics Others Perspectives

7 Cavalier Oblique Front view true size Receding Axis Angle (Normally 30°, 45° or 60°) is Variable Depth dimension (receding axis) true size

8 Cabinet Oblique Front view true size Receding Axis Angle (Normally 30°, 45° or 60°) is Variable Depth dimension (receding axis) half size

9 Side by Side Comparison Cavalier ObliqueCabinet Oblique

10 Which is the cube ?

11 Were you right?

12 Angles in Oblique Angles in front view are drawn true size Other angles must be located using coordinates Appearance of angles may be distorted

13 Circles in Oblique Drawn true size in front view Drawn as ellipses on receding planes Layout using a Rhombus

14 Cylinders in Oblique Front and Back surfaces are circular Sides are drawn as lines tangent to the front and back

15 Exercise Sketch an Oblique of a classical tombstone. Add a bullet hole through the stone.

16 Types of Axonometrics

17 Orientation of Pictorial Objects

18 Isometrics Axes equally separated (120°) H, W, and D measurements are true size along iso. axes Angles must be located by coordinates Circles appear as ellipses on all surfaces

19 Isometric Circles & Angles

20 Isometric Ellipses

21 The Isometric Ellipse Template

22 Using the Ellipse Template

23 Drawing Rounded Corners

24 Construction of Cylinders Lightly block in the cylinder

25 Construction of Cylinders Lightly block in the cylinder Sketch the upper and lower ellipses

26 Construction of Cylinders Lightly block in the cylinder Sketch the upper and lower ellipses Connect the ellipses with Tangent lines

27 Construction of Cylinders Lightly block in the cylinder Sketch the upper and lower ellipses Connect the ellipses with Tangent lines Darken the lines

28 Practice Exercise Complete the orthographic views shown and Sketch an isometric of the part.


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