L09 - Orthographic Projections GE101 Engineering Graphics...

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    Orthographic Projections GE101 Engineering Graphics and Design
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    Orthographic Projections  Parallel projection technique Projectors normal to projection plane  Projection Plane Projectors NOTE: CAD Systems typically use orthographic projection
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    Orthographic Projection Categories Axonometric Three object faces visible No principal axes  parallel/perpendicular to  projection plane Multiview Only one object face  visible One object face (i.e., two  principal axes) parallel to  projection plane
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    Axonometric Projections  Trimetric – no equal angles All principal axes foreshortened unequally Classed according to angles made by principal axes  when projected onto projection plane Dimetric – two angles are equal Two principal axes are equally  foreshortened Isometric – all angles equal (iso   equal,  metric   measure) All principal axes foreshortened equally 
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    Axonometric Projection Classes
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  • Fall '05
  • Leake
  • Architectural drawing, Projection Plane, principal axes

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