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Multiview and 3D Drawings

Multiview and 3D Drawings. By Carlin Bright. Axonometric Projections. A 3D projection that allows you to see all three axes. Axonometric Projections. Isometric – all three axes are at the same scale Dimetric – only two axes at the same scale (example, oblique)

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Multiview and 3D Drawings

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  1. Multiview and 3D Drawings By Carlin Bright

  2. Axonometric Projections • A 3D projection that allows you to see all three axes

  3. Axonometric Projections • Isometric – all three axes are at the same scale • Dimetric – only two axes at the same scale (example, oblique) • Trimetric – all three axes at different scales

  4. Axonometric Projections

  5. Isometric Projections • All three axes are the same scale and there is 120° between each axis

  6. Isometric Projections • Use a special grid paper when sketching

  7. Isometric Projection Isometric • All lines parallel to the axes are called “isometric lines” • All lines not parallel to the axes are “non-isometric lines,” which means they CANNOT be measured along the same scale as the isometric lines Non-Isometric

  8. Dimensioning • Extension lines should continue along axes

  9. Oblique Projection • A type of dimetric projection • Two axes are perpendicular to each other • The third axis is at an arbitrary angle, usually 30° or 45°

  10. Orthographic Projections • Like the single view drawings we have been doing, ORTHOGRAPHIC PROJECTIONS look at one side of an object

  11. Orthographic Projections • MULTIPLE orthographic projections are necessary to fully define an object

  12. Orthographic Projections • Imagine the object you are going to draw is in a glass box, with the large flat surfaces of the object parallel to the walls of the box • As you look directly at each side of the box you see what would be visible in the total of 6 different views (top, bottom, front, back, left, and right)

  13. Orthographic Projections

  14. Orthographic Projections • Projections are arranged in this standard way: TOP REAR LEFT FRONT RIGHT BOTTOM

  15. Orthographic Projections

  16. Orthographic Projections • How many views should you include in a multiview? • Only as many as is needed to define the object

  17. Orthographic Projections • Hidden and Center Lines are used the same as in single view

  18. Orthographic Projections • Use a miter line to transfer depth from the top to the side view, or vice versa

  19. Orthographic Projections

  20. Orthographic Projections • Important vocab: • Adjacent view – a view that is next to the view you are looking at (the front and side views) • Central view – a view that is between two other views (the front view) • Related views – views that are adjacent to a central view (the top and side views)

  21. Dimensioning • When dimensioning a multiview drawing (top, front, and side), only use as many dimensions as needed to fully define • Example, the WIDTH of a drawing does not need to be included on the top view and the front view, just one or the other

  22. Review

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