Orthographic Drawing - Mobile Phone Example. 8. Orthographic Projection is a method of producing dimensioned working drawings or blueprints of 3-D Objects using a series of related 2-D views of the object to communicate the object's length, width and depth. Stages of Drawing a Mobile Phone in Orthographic. They are used to obtain engineering drawings for clarity. slot for t.v. Planes - Classifications 5. Three orthographic views in first-angle projection are given in Fig. First angle projection is a method or angle of orthographic projection and in this method 3D drawings are created in 2D. We will keep adding more information on why 2nd and 4th angle projection systems are not used to create engineering drawings. Axonometric projection is further subdivided into three categories: isometric projection, dimetric projection, and trimetric projection, depending on the exact angle at which the view deviates from the orthogonal. The word orthographic means to draw at right angles. Wind Power Device - Orthographic Drawing. Whereas 3rd angle projection is more popular in North America and Asian countries. 9. Orthographic projection is the method of representing the exact shape of an object in two or more views, on planes always “at right angles to each other” by extending perpendiculars from the object to the planes. This plane is held perpendicular at the ends of the other two planes. Working Drawings. 1. First and Third Angle Orthographic Projection Often, a three dimensional object must be represented with precision and clarity on a plane surface. Methods of orthographic projections 7. Orthographic projection also called orthogonal projection is a means of representing three-dimensional objects in two dimensions. Orthographic projection is a method of producing a number of separate two-dimensional inter-related views, which are mutually at right angles to each other. Orthographic (Definitions and Important terms) 4. 3. In this video lecture, the concept of first angle method of orthographic projection is explained with example. First angle and third angle projection are the types of Orthographic projection systems that are used to draw engineering drawings. Please add your suggestions, comments or questions on second and fourth angle projection systems in the comment box. This can be represented by drawing three two dimensional objects merging them into an isometric projection. 10. In orthographic projection, all widths in the end view are equal in size to depths in the plan view, and of course the opposite is true that some dimensions required to complete end views may be obtained from given plan views. Profile plane is used to take side views. In third angle projection, the top view is placed below the front view and side view is next to the front view. 450 x fv y 30 40 tv 30 d 40 40 15 o for t.v. The most popular system is third angle projection, as seen on this page. 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