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CADD-1 Lesson 8

Multiview Drawing & Orthographic Projection

Multiview Drawing The exact representation of two or more views of an object.
Orthographic Projection Technique used to create an accurate multiview drawings.
Six Principle Views Front, Top, Right, Left, Bottom, and Rear
3 Primary Views Front, Top, and Right Side
First Angle Projection Primarily used in Europe - places the top view below the front view.
Third Angle Projection U.S. & Canada - places the top view above the front view.
Front View ShowS width & Height - projects to Vertical Plane
Side View Shows Height & Depth - projects to the Profile Plane
Top View Shows Width & depth - projects to the Horizontal Plane
Ortho Straight or Right Angles
Graphic Written or drawn
Projection Derived from two latin words meaning to throw forward.
45 degree miter line Used to transfer depth between views.
Centerlines Used to locate views and dimensions.
Hidden Lines Represents linews that are not seen in a particular view.
Primary Centerlines Locates the center on symmetrical views where one is a mirror image.
Secondary Centerlines Locate features of a part such as the center of a hole.
Visualization Being able to see the solution to a problem
Implementation The act of putting the plan into action.
Pictorial Drawing Looks like a picture, shows what a multiview drawing looks like in real life.
Negative Cylinder Technical term used to describe a hole thru an object.
Solid Model A 3-Dimensional representation of an object in a computer file.
Plane An imaginary flat surface that has no thickness.
LTSCALE Command that controls the size of your linetypes.
Foreshortened An object surface that is not parallel to the projection plane and is not drawn as a true face in the resulting view. It is common for inclined surfaces.
Created by: tmurphy
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