Prepared by: Nor Helya Iman Kamaludin Prepared by: Nor Helya Iman Kamaludin Lecture 4: Multiple Views 1 PTT 105/3: Engineering Graphics

Prepared by: Nor Helya Iman Kamaludin

Lecture 4: Multiple Views

1PTT 105/3: Engineering GraphicsProject Lead The Way, Inc.Copyright 20071Sketching Multiview DrawingsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical Sketching

Multiview Drawing A multiview drawing is one that shows two or more two-dimensional views of a 3-D object. Multiview drawings provide the shape description of an object. When combined with dimensions, multiview drawings serve as the main form of communication between designers and manufacturers.2PTT 105/3: Engineering Graphics

Project Lead The Way, Inc.Copyright 20072Sketching Multiview DrawingsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical Sketching

Multiview Drawing3PTT 105/3: Engineering Graphics

Project Lead The Way, Inc.Copyright 20073Sketching Multiview DrawingsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingWidth, Depth, and HeightAll three-dimensional objects have width, height, and depth.Width is associated with an objects side-to- side dimension.Height is the measure of an object from top- to- bottom.Depth is associated with front-to-back distance.4PTT 105/3: Engineering Graphics


Width, Depth, and Height

PTT 105/3: Engineering GraphicsProject Lead The Way, Inc.Copyright 20075Sketching Multiview DrawingsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical Sketching

45Width, Depth, and Height6PTT 105/3: Engineering Graphics

Project Lead The Way, Inc.Copyright 20076Sketching Multiview DrawingsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical Sketching Orthographic projection is a technique that is used to create multiview drawings. Orthographic projection is any projection of the features of an object onto an imaginary plane of projection. The projection of the features of the object is made by lines of sight that are perpendicular to the plane of projection. The use of a 45 miter line and Projection Lines provide a quick, accurate method of drawing

Orthographic Projection7PTT 105/3: Engineering Graphics

Project Lead The Way, Inc.Copyright 20077Sketching Multiview DrawingsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingOrthographic projection is the most commonly used drafting method because it describes shapes of objects completely and exactly

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The best way to understand orthographic projection is to imagine an object contained inside a glass box.Orthographic Projection9PTT 105/3: Engineering Graphics


There is a total of six glass walls surrounding the object. Each wall represents a projection plane onto which a two- dimensional object view will be created.Orthographic Projection10PTT 105/3: Engineering Graphics

Project Lead The Way, Inc.Copyright 200710Sketching Multiview DrawingsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical Sketching A projection plane, also referred to as a plane of projection or picture plane, is an imaginary surface that exists between the viewer and the object. The projection plane is the surface onto which a two-dimensional view of a three- dimensional object is projected and created.Projection Plane11PTT 105/3: Engineering Graphics


Start by focusing only on the front projection plane. A person standing in front of the object would see only the five corners identified in black.12345

line of sightat 90 angle to projection planeOrthographic Projection12PTT 105/3: Engineering Graphics


Projection lines are used to project each corner outward until they reach the projection plane.Orthographic Projection13PTT 105/3: Engineering Graphics

Project Lead The Way, Inc.Copyright 200713Sketching Multiview DrawingsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical Sketching A projection line is an imaginary line that is used to locate or project the corners, edges, and features of a three-dimensional object onto an imaginary two-dimensional surface.Projection Lines14PTT 105/3: Engineering Graphics


The visible edges of the object are then identified on the projection plane by connecting the projected corners with object lines.Orthographic Projection15PTT 105/3: Engineering Graphics


The orthographic projection process is then repeated on the other projection planes.Orthographic Projection16PTT 105/3: Engineering Graphics


Sketching a Multiview Drawing Sketching multiview drawing can be easily done using points, construction lines, and object lines.17PTT 105/3: Engineering Graphics

Project Lead The Way, Inc.Copyright 200717Sketching Multiview DrawingsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingStep #1:Calculate the amount of space that the views will take up.Sketching a Multiview Drawing18PTT 105/3: Engineering GraphicsProject Lead The Way, Inc.Copyright 200718Sketching Multiview DrawingsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingCalculating Required Space

Overall Multiview Sketch Height?

Overall Multiview Sketch Width?

18 spaces12 spaces19PTT 105/3: Engineering Graphics

Project Lead The Way, Inc.Copyright 200719Sketching Multiview DrawingsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingSketching a Multiview DrawingStep #1:Calculate the amount of space that the views will take up.Step #2:Layout the boxes within which the individual views will occur using points and construction lines.20PTT 105/3: Engineering Graphics


Construction Line Layout21PTT 105/3: Engineering Graphics

Project Lead The Way, Inc.Copyright 200721Sketching Multiview DrawingsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingSketching a Multiview DrawingStep #1:Calculate the amount of space that the views will take up.Step #2:Layout the boxes within which the individual views will occur using points and construction lines.Step #3:Identify the visible edges by drawing object lines on top of the construction lines.22PTT 105/3: Engineering Graphics


Object Line Layout23PTT 105/3: Engineering Graphics

Project Lead The Way, Inc.Copyright 200723Sketching Multiview DrawingsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingPOP QUIZ!!!PTT 105/3: Engineering Graphics24

A Question Each of the blocks at right has the same overall dimensions and color. What else do they have in common?25PTT 105/3: Engineering Graphics


The Answer isEach of the blocks at right has the same overall dimensions and color. What else do they have in common?They all have identical top views!

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Prepared by: Nor Helya Iman Kamaludin Prepared by: Nor Helya Iman Kamaludin Lecture 4: Multiple Views 1 PTT 105/3: Engineering Graphics