Drafting- Test #1 (3/12) Flashcards
(26 cards)
sketch
- any image drawn on paper without tools
- rough/undefined
- avoid mechanical or hard line look
basis for continuous lines
- A to B, start and stop, go to the target
- left to right
- top to bottom (vertical)
isometric drawing
example of a pictorial drawing
pictorials
- useful for showing the appearance of objects
- show several faces in a single view (supplement multi-view drawings)
planes of rectangular prism
- top: horizontal plane
- left: frontal plane
- right: profile plane
principles of isometric drawings
- all verticals remain vertical
- all parallel lines remain parallel
- all lines parallel to x, y, z axes can be drawn to scale
multi-view drawings
- orthographic
- add 90 degrees to each other
one point perspective
- x, y is perpendicular to observer
- y is oblique
two point perspective
- z is perpendicular to observer
- x, y is oblique
three point perspective
x, y, z are oblique to observer
isometric lines
parallel to x, y, z axes
extrusion
adding, extruding
intrusion
- deleting, removing
- slot intrusion is continuous
- notch intrusion is partial
four center method
ellipses in horizontal, frontal, and profile planes
orthographic theory
based on viewing surfaces drawn to right angles of each other
miter line
a 45 degree line to draw the right side view from top and front view
hidden lines
- used to show invisible parts that otherwise could not be shown at all
- represented by a series of dashed lines
center lines
- an object is symmetrical when its shape is equal to both sides of center lines
- represented by overlapping C and L
rules for coinciding lines
- solid covers hidden
- solid covers center lines
- hidden covers center lines
uniformity in lettering
- never in capitals and lowercase
- use guidelines
- avoid thick/thin strokes
- background areas between letters should appear
- use single stroke gothic
size in lettering
- TOM Q. VAXY: 6 x 6
- the rest of the alphabet (except W and I) are 5 x 5
angle for tilted letters
5 up, 2 over (a little over 60 degrees)
2H
- 0.7, medium
- used for lettering, object lines, dimension lines
H
- 0.9, thick
- border
