PROJECTION S PROJECTIONS Perspective Projection Parallel projection Orthographic

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PROJECTION S

PROJECTION S

PROJECTIONS

PROJECTIONS

Perspective Projection Parallel projection

Perspective Projection Parallel projection

Orthographic Projection (Multiview Projection) 4

Orthographic Projection (Multiview Projection) 4

Different Viewpoint

Different Viewpoint

Orthographic Projection

Orthographic Projection

Standard 2 D views

Standard 2 D views

The Principal Dimensions of an Object

The Principal Dimensions of an Object

Third Angle Projection First Angle Projection USA, Canada Europe, Asia

Third Angle Projection First Angle Projection USA, Canada Europe, Asia

Third Angle Projection First Angle Projection USA, Canada Europe, Asia

Third Angle Projection First Angle Projection USA, Canada Europe, Asia

Standard Views of Primitive Solids

Standard Views of Primitive Solids

View Orientation Poor orientation Good orientation

View Orientation Poor orientation Good orientation

Select the most descriptive views Use minimum number of views to describe the object

Select the most descriptive views Use minimum number of views to describe the object

Conventional Practices - Intersections

Conventional Practices - Intersections

Miter Lines Miter lines are used to transfer depth information. 45 o line drawn

Miter Lines Miter lines are used to transfer depth information. 45 o line drawn from point O O Standard multiviews

Fillets, Rounds & Chamfers

Fillets, Rounds & Chamfers

Top view

Top view

Edge Lines – Principal & Inclined 2 Principal lines appear vertical, horizontal or as

Edge Lines – Principal & Inclined 2 Principal lines appear vertical, horizontal or as point views. Inclined lines appear inclined in one view.

Edge Lines – Oblique line appears inclined in all views 20

Edge Lines – Oblique line appears inclined in all views 20

Principal Planes Principle planes are parallel to principal orthographic planes

Principal Planes Principle planes are parallel to principal orthographic planes

Inclined Planes Inclined planes are perpendicular to two opposite orthographic planes.

Inclined Planes Inclined planes are perpendicular to two opposite orthographic planes.

Oblique Planes Oblique planes are neither parallel nor perpendicular to any principal orthographic planes.

Oblique Planes Oblique planes are neither parallel nor perpendicular to any principal orthographic planes.

Type of Planes Oblique Principal Inclined

Type of Planes Oblique Principal Inclined

Edge View of a Plane Principal planes appear in true size in one plane

Edge View of a Plane Principal planes appear in true size in one plane and as an edge view in the other two planes.