ECAD-Views to Isometric

8/2/2019 ECAD-Views to Isometric

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Oblique and IsometricDrawings

GSMST


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Review Learning Objectives

Sketch pictorials of an object (either obliqueor isometric) given orthographic views of the

objectSelect the best orientation of an objectshown in pictorial

Define what makes a drawing a: cavalier

oblique, cabinet oblique, isometric,axonometric, perspective, or orthographicviews


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Pictorial

A three dimensional pictorial is adrawing that shows an objects threeprincipal planes, much as they would becaptured by a camera

Sometimes they are called TechnicalIllustrations


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Cavalier Oblique

Front view true size

Receding Axis Angle

(Normally 30, 45or 60) is Variable

Depth dimension(receding axis) true

size


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Cabinet Oblique

Front view true size

Receding Axis Angle

(Normally 30, 45or 60) is Variable

Depth dimension(receding axis) half

size


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Side by Side Comparison

Cavalier Oblique Cabinet Oblique


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Which is the cube ?


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Were you right?


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Angles in Oblique

Angles in front vieware drawn true size

Other angles mustbe located usingcoordinates

Appearance of

angles may bedistorted


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Circles in Oblique

Drawn true size infront view

Drawn as ellipses onreceding planes

Layout using aRhombus


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Cylinders in Oblique

Front and Backsurfaces are circular

Sides are drawn aslines tangent to thefront and back


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Exercise

Sketch an Oblique of a classicaltombstone. Add a bullet hole through

the stone.


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Types of Axonometrics


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Orientation of Pictorial Objects


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Isometrics

Axes equally separated(120)

H, W, and D

measurements are truesize along iso. axes

Angles must be locatedby coordinates

Circles appear asellipses on all surfaces


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Isometric Circles & Angles


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Isometric Ellipses


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Using the Ellipse Template


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Drawing Rounded Corners


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Construction of Cylinders

Lightly block in thecylinder


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Sketch the upperand lower ellipses


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Connect the ellipseswith Tangent lines


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Connect the ellipseswith Tangent lines

Darken the lines


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Practice Exercise

Complete theorthographic

views shownand Sketchan isometricof the part.

ECAD-Views to Isometric

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