Lesson 1: Visualizing the Fold (Plates 1-9 & 1-10)
Duration of Days: 1.5
Lesson Objective
Students will interpret 3D isometric pictorials to generate perfectly aligned 3-view orthographic drawings.
How does a "sloped" surface in an isometric view appear in the Top vs. the Front view?
Why is it essential to maintain "projected alignment" between views?
Projected Alignment, Sloped Surface, Foreshortening, Miter Line.
CT CADD.03.02: Apply the principles of orthographic projection to select the proper views.
Students begin the high-intensity sequence with Plates 1-9 and 1-10. They must "unfold" the 3D part in their minds and draw the Top, Front, and Right Side views. They will use the MITER LINE (45-degree) method in AutoCAD to ensure depth is perfectly transferred.
Purpose: To reinforce the logic that a 3D object has only one set of "true" dimensions.
DOK Level: 3 (Strategic Thinking).
Provide "Guided Layout" files where the 45-degree miter line and view boxes are pre-placed on a non-printing layer.
Accuracy check: Are the views perfectly aligned vertically and horizontally?
CAD Book - 3 Dimensional & 3 View Drawings 1-9 & 1-10.