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CADD-1 Lesson 8
Multiview Drawing & Orthographic Projection
Term | Definition |
---|---|
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. |