Reminders for Tech Drawing:

- Use a ruler for all the lines and a compass for all the curves.

- Uniform spacing in hatching, 45 or 135 deg

- Name the sections

e.g "section A-A" near the section view

- Don't forget ALL the centerlines


DIMENSIONING


- Placement under or over the dimension line

- Use diameter symbol when needed Φ

- Dimension holes

- Don't dimension hidden lines!



Isometric view:


- The right orientation is the view with the fewest hidden lines!









NOTES FROM SESSION ONE



Standard reducing scales are
1:2, 1:5, 1:10, 1:20, 1:50, 1:100


Standard enlarging scales are
2:1, 5:1, 10:1, 20:1, 50:1, 100:1
























FROM SLIDES 2 (Orthographic Projection)

Orthographic projection = parallel and orthogonal projection

- Multiview drawing shows sufficient 2D views of an object.

- Axonometric drawing shows one 3D view






















PRESENTATION 3.0 HOW TO ORTHOGRAPHIC VIEW


View selection:

1. Orient the object to the best position relative to a glass box.


2. Select the front view

- The longest dimension of an object should be presented as a width (in a front view)




3. Select adjacent views

Choose the minimum number of views that can represent the major features of the object


ISO, 1st angle view(s) example:



















How to Isometric projection :D
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A parallel line is always parallel to each other regardless of the kind of views, i.e. orthographic and isometric views.
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Try to get how this one works: