Chapter 5: Orthographic Views. Agenda 3 Views of an Object Projection between Views Hidden lines and...
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Transcript of Chapter 5: Orthographic Views. Agenda 3 Views of an Object Projection between Views Hidden lines and...
![Page 1: Chapter 5: Orthographic Views. Agenda 3 Views of an Object Projection between Views Hidden lines and precedence Demonstration Compound Lines Oblique Surfaces.](https://reader036.fdocuments.in/reader036/viewer/2022062304/56649cee5503460f949bbf20/html5/thumbnails/1.jpg)
Chapter 5: Orthographic Views
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Agenda
• 3 Views of an Object• Projection between Views • Hidden lines and precedence• Demonstration• Compound Lines• Oblique Surfaces• Rounded Surfaces• Holes, in slanted surfaces
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![Page 4: Chapter 5: Orthographic Views. Agenda 3 Views of an Object Projection between Views Hidden lines and precedence Demonstration Compound Lines Oblique Surfaces.](https://reader036.fdocuments.in/reader036/viewer/2022062304/56649cee5503460f949bbf20/html5/thumbnails/4.jpg)
![Page 5: Chapter 5: Orthographic Views. Agenda 3 Views of an Object Projection between Views Hidden lines and precedence Demonstration Compound Lines Oblique Surfaces.](https://reader036.fdocuments.in/reader036/viewer/2022062304/56649cee5503460f949bbf20/html5/thumbnails/5.jpg)
![Page 6: Chapter 5: Orthographic Views. Agenda 3 Views of an Object Projection between Views Hidden lines and precedence Demonstration Compound Lines Oblique Surfaces.](https://reader036.fdocuments.in/reader036/viewer/2022062304/56649cee5503460f949bbf20/html5/thumbnails/6.jpg)
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Visualization
• Ability to look at a 3D object and mentally see the appropriate 2D orthographic views
• Ability to look at a 2D ortho drawing and mentally picture the 3D object
• This class is going to develop that skill
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Line Types
Visible LineHidden LineCenter LineDimension LineConstruction Line
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Visible
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Linetype Precedence
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Demonstration
• We’ll tackle our first multi-view drawing• First we’ll set up layers for
– hidden, center, construction, and final lines
• We’ll draw the overall layout• Then we’ll fill in the details• Transfer construction lines into final lines
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Layers and Linetypes• Click on Object Properties Tool
– change color, linetype, lineweight by layer– Layer Properties Manager (ObjPrp or Format)
• New, name = hidden, New, name = center• Click on Hidden Layer line, select color and LT
– Load hidden and center if necessary, choose • Can turn a layer on/off (lightbulb), scale linetypes
• Draw on different layers– Switch with Layer control tool– Make Object’s layer current– Select object, switch layer LCT, 2x(esc)
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Mod: Cut a Channel
• Cut channel thru bottom of object• Use hidden lines to show channel
• Work on 1st two problems in A4.doc
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Demonstration II
• This drawing has a number of slanted surfaces intersecting in ways that need additional care to portray accurately
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Oblique Surfaces
• Not shown “true” in any view• Hard to visualize, must rely on projection
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Rounded Surfaces
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Holes
• Holes viewed head on need center lines • Holes viewed sideways need hidden and
centerlines• Holes into slanted surfaces become ellipses in
some views. Use projection to create bounding rectangle, fill in with ellipse
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