WORKING DRAWINGS Footer Text 11/14/2018

Theory of Shape Description When describing three dimensional objects we normally consider the part as having; length, width and height or width, depth and height or length, width and thickness General Rule: Distances from left to right are referred to as width or length. Distances from front to back as depth or width, and vertical distances as heights. 11/14/2018

Orthographic Projection What are Orthographic Views? the view you would see looking directly at one side or "face" of the object. describes the features of the object completely and accurately helps to visualize the part 11/14/2018

Orthographic Projection Types of Orthographic Views: One view drawings: objects requiring one view only to describe it (ie. templates/paper/balls/cylindrical objects) Two view drawings: objects that require two views to completely describe it (Ie. discs/gears/wheels) Multi-view drawings: objects that require at least three views to completely describe it. Each view represents a different side or face of the object. The view is projected one from the other and arranged systematically 11/14/2018

General Rules for Selection of Views draw views necessary to fully explain shape the front view shows the width or length of the object and gives the most information about its shape. when the longest dimension is drawn in the horizontal position, the object will seem more balanced. choose views which will show most of the features as "visible" thus avoiding use of hidden lines. 11/14/2018

Orthographic Views 11/14/2018

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Fully Defining Objects determining views divide part into features check that features are represented on all views balance a drawing 11/14/2018