Advanced Sketch Tools. Mirror Entities. Need to have an axis to mirror about. Need to determine axis of symmetry. Copy. Need to pick a ‘start point’ on the selected entities The ‘start point’ is the reference point for those entities. Rotate. Scale. Move. Linear Pattern. - PowerPoint PPT Presentation
• Need to pick a ‘start point’ on the selected entities
• The ‘start point’ is the reference point for those entities
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Rotate
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Scale
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Move
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Linear Pattern
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Circular Pattern
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Defining New Sketch PlaneInsert >> Reference Geometry >> Plane• Need up to 3 references for the
plane
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Info for a plane• 1 Point• 1 Line
• 3 Points
• 1 Line• 1 Edge(in the same plane)
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Info for a planeParallel Plane:• Choose 1 reference face• Choose 1 offset point/vertexPlane at an Angle:• 1 reference face – choose ‘at angle’• 1 axis or rotation
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Info for a planeOffset Distance:• 1 Plane – Choose ‘offset distance’ Perpendicular to:• 1 sketch entity• 1 point
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Info for a planeTangent To:• 1 non-planar face• 1 point on the edge of that face
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PROJECTION THEORY
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Understanding Projections
Projection:–A “VIEW” of an object
–Intended to be shown on a PLANE
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Multi-View Projection
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Visualization
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Edges and Vertices
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Edge View of a Surface
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True-Size View of Surface
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Foreshortened View of Surface
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Normal Surfaces
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Inclined Surfaces
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Oblique Surfaces
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Edges (1)
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Edges (2)
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Edges (3)
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VIEWS of OBJECTS
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Principal Dimensions
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Revolving an Object
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Revolving an Object
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The Six Standard Views
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The Six Standard Views
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Necessary Views
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Two Necessary Views
Two Necessary Views
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One Necessary View
One Necessary View
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Orthographic Projection(3rd Angle
Projection)
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Projection of an Object
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Projection Method
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Top View
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Right-Side View
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The Glass Box
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The Glass Box
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Unfolding the Box
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Unfolding the Box (2)
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Unfolding the Box (3)
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Meaning of Lines
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Folding Lines
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Transferring Depth Dimensions
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Projecting a Third View (1)
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Projecting a Third View (2)
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Projecting a Third View (3)
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Projecting a Third View (4)
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Projecting a Third View (5)
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Alignment of Views
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Alternative Positions of Views
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Parallel Edges
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Angles
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Similar Shapes of Surfaces
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Interpreting Views• One method of interpreting sketches
is to reverse the mental process used in projecting them
• Each view provides certain definite information about the shape of the object and all are necessary to visualize it completely
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First- and Third-Angle Projection
• There are two main systems used for projecting and unfolding the views:– Third-angle projection which is used in
the United States, Canada and some other countries
– First-angle projection which is primarily used in Europe and Asia