Communication

Technical Sketching and Drawing

Orthographic Sketch

• A Multi-view drawing that typically shows the front , right side and top view. (orthographic)

• When the side view is perfectly in line with the front view, it is called Projection.

Orthographic con’t

• The top view’s width dimension is projected from which other view?

• Front View

Orthographic Con’t

• The Surface with the most detail is shown is which view?

• Front View• Most detailed drawings are orthographic

drawings

Cabinet (oblique)

• In cabinet oblique drawings, the receding lines are shortened by one-half their true length to compensate for distortion and to approximate more closely what the human eye would see..

Cavalier

• In cavalier oblique drawings, all lines (including receding lines) are made to their true length.

Oblique Drawings

• A Sketch shows the front view as if a person were looking directly at it.

Isometric

• A pictorial sketch that has been drawn as it it were viewed from one corner at a 30 º angle.

Perspective

• A sketch that shows the object as the human eye or camera would see it.

• 1 pt

2 pt Perspective

3 pt Perspective

Types of Lines