๐ ENGINEERING DRAWING Chapter 12 – Isometric Projection 12.1 Introduction In orthographic projection, we need multiple views (FV, TV, SV) to represent an object. But sometimes we need a single pictorial view that shows the 3D appearance . This is achieved by Isometric Projection . ๐ “Isometric” = equal measure (from Greek iso = equal, metron = measure). 12.2 Principle of Isometric Projection Object is imagined inside a transparent cube . Cube is tilted so that one of its body diagonals is perpendicular to the plane of projection. As a result: All three principal axes (X, Y, Z) are equally inclined (120° apart) . Scale along each axis is equally reduced (isometric scale) . 12.3 Isometric Axes and Planes Isometric Axes → Three lines meeting at a point at 120° angles . One vertical, two inclined at 30° to horizontal. Isometric Planes → Planes formed by any two isometric axes. They appear as parallelograms instead of squares....
Comments