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DIEDRIC SYSTEM

DIEDRIC SYSTEM. 2.4 Diedric system. 2.4 Diedric system. The diedric system represents the objects using a perpendicular projection on a plane . 2.4 Diedric system. The projection or VIEW consists of drawing just what we see when we are perpendicular to the object and to the plane. Page 28.

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DIEDRIC SYSTEM

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  1. DIEDRIC SYSTEM

  2. 2.4 Diedric system

  3. 2.4 Diedric system The diedric system represents the objects using a perpendicular projection on a plane

  4. 2.4 Diedric system The projection or VIEW consists of drawing just what we see when we are perpendicular to the object and to the plane Page 28

  5. Floor view Profile view Front view Profile view Front view Floor view 2.4 Diedric system To define an object we only need 3 views, floor, front and profile: • Floor view: from the top of the object • Front view: facing the object • Profile view: from the side

  6. Draw the left profile, floor and front view of your pencil case.

  7. Right profile front front Left profile floor floor 2.4 Diedric system Diedric Rules • The front is usually indicated with an arrow • The views distribution • The front is always on top of the floor • The profile is situated the other way round, that is, the left profile is situated on the right

  8. 2.4 Diedric system Remember: • The same height: the object has the same height on the floor and on the profile views • The same width: on the front and on the floor views • The same depth: on the floor and on the profile views

  9. 2.4 Diedric system • Exercise: Draw the front, left profile and floor views of the class chair

  10. 2.4 Diedric system • Exercise: Draw the front, profile and floor views of the class chair

  11. 2.4 Diedric system Where do we have to be situated to see these objects like circles?

  12. 2.4 Diedric system

  13. 2.4 Diedric systemExercise 11: Complete the views of the following objects Page 31

  14. 2.4 Diedric systemExercise 11: Complete the views of the following objects

  15. 2.4 Diedric systemExercise 11: Complete the views of the following objects

  16. 2.4 Diedric systemExercise 11: Complete the views of the following objects

  17. 2.4 Diedric system • Non visible lines: when we know there is a hidden line we have to draw it using a discontinuous line hidden line

  18. 2.4 Diedric system • Insert video

  19. 2.4 Diedric system Activity: draw the front, floor and right profile views of this figure colouring each face in one colour.

  20. 2.4 Diedric system Activity: draw the front, floor y left profile views of this figure colouring each face in a different colour.

  21. 2.4 Diedric system • Exercice: draw the right profile, front and floor views of these objects

  22. 2.4 Diedric system

  23. 2.4 Diedric system

  24. 2.5 Marking and standardizing • The standardizing is the group of rules that defines technical drawing. • For example: • For paper size we use the DIN rule: A0,A1,A2… • The lines are: • Thick continuous lines: are used to outline objects • Thick discontinuous lines: indicate hidden lines • Thin continuous lines: are used for auxiliary measures and reference lines

  25. Reference line 2.5 Marking and standardizing Measure Measure line Auxuliary Line

  26. 2.5 Marking and standardizing Outside thick continuous line Thick discontinuous line for a hidden edge

  27. 2.5 Marking and standardizing Marking : indicating the real dimensions above the object

  28. 2.5 Marking and standardizing • Activity: draw these views indicating which rules are broken Wrong Wrong Wrong Wrong Correct Correct Correct Correct

  29. 2.5 Marking and standardizing. Marking follows some rules: see page 37 • The measure lines: • We place them parallel to the edge and slightly separated • They are limited by the auxiliary lines • The arrows are thin and enlongated, they go from one side to the other

  30. 2.5 Marking and standardizing • Auxiliary lines • We place them perpendicular to the measure lines • They cross the measure line a little bit • They never cut the measure line

  31. 2.5 Marking and standardizing • Activity: draw these views indicating which rules are broken Wrong Correct

  32. 2.5 Marking and standardizing • The measures: • We indicate the real measure in milimetres, but “mm” is never written • They are placed above the measure line, never under it • We only use the extrictly necessary measures

  33. 2.5 Marking and standardizing • Activity: draw these views indicating which rules are broken Wrong Correct

  34. 2.5 Marking and standardizing • Activity: Draw the front, left profile and floor views of your pencil marking the measures

  35. Let’s revise the important terms

  36. Unit 2.Drawing applied to technology • What are we going to see in this unit? • 2.1 Drawing tools and how to use them • 2.2 Drafts and sketches • 2.3 Drafting scale • 2.4 Diedric system • 2.5 Marking and standardizing

  37. Vocabulary • Paper size • Cellulose • Clay, graphite, lead • Hard and soft pencils • Erasers, technical pencil • Sixty and forty-five degree rules • Sketch, draft, free hand drawing, measures • Scale, real and drawn size, reduction, enlargement scales • To be reduced 100 times… • Length, height, width • Long, high, wide.

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