click below
click below
Normal Size Small Size show me how
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. |