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The 3D graphic on the right shows a table lamp with a modern lampshade - Leaving Cert DCG - Question C-3 - 2013
Question C-3
The 3D graphic on the right shows a table lamp with a modern lampshade. The lampshade is open at the top and at the bottom. The plan and elevation of the lampshade... show full transcript
Worked Solution & Example Answer:The 3D graphic on the right shows a table lamp with a modern lampshade - Leaving Cert DCG - Question C-3 - 2013
Step 1
Draw the given views of the lampshade.
Answer
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Planning the Drawing: Begin by sketching the elevation view of the lampshade based on the provided dimensions. Ensure that straight line edges are correctly represented.
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Establishing Centers & Curves: Identify the centers of curvature for the top and bottom edges. Utilize these centers to accurately draw the curved sections of the lampshade. Make sure to maintain symmetry and proportions as per the elevation.
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Finish the Elevation: Add any flat sections or outlines that are necessary to complete the elevation view.
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Draw the Plan View: Transition to the plan view, using the same dimensions and ensuring that the top view aligns with the elevation details. Highlight any relevant features such as diameter and symmetry.
Step 2
Draw a one-piece surface development of the lampshade.
Answer
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Identify Surface Areas: Begin by identifying the different surfaces that make up the lampshade—front, back, and side surfaces.
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Posting Development: Develop the front and back surfaces by projecting vertical outlines according to the curves identified in the elevation. Maintain correct dimensions throughout.
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Inclined Surfaces Development: Next, calculate and represent the inclined surfaces based on the curvature identified, ensuring that all angles and dimensions are respected from the elevation and plan views.
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Curved Surface Division: Divide the curved surfaces as necessary to facilitate accurate folding during construction.
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Create Development Template: Finally, piece together all sections onto a single piece of drawing material, ensuring that the presentation is clear and dimensions are legible.