Week 7 Flashcards
Sketching can be a way to
- Formulate ideas
- Understand a problem
- Communicate ideas
Axonometric projections
- Projects a 3D object onto a 2D place without the lines of projection converging.
- All three dimensions are present
- Isometric View
Isometric View
- Horizontal lines in two places shown 30 degrees to the horizontal
- Uses parallel lines of sight
Parallel lines of sight
(Literally parallel lines come out of the view of the observer), observer is at an INFINITE VIEWPOINT
Isometric Cube
- Bases of many isometric drawings and shapes
- Can be used to draw more complex objects
Orthographic/Multiview drawings
- A way to represent a 3D object in two dimensions
- The object surface and projection plane are parallel
Sectional View
The inside of an object by imagining it is cut on a plane
Cutting plane
Indicates where the object was cut and should be shown in a diagram adjacent to the section view.
Section lines
After cutting, the exposed surface is indicated by section lines or hatching, section lines should not run parallel to any outlines of the object.
Section view types
- Cross-section
-Half-section
Dimensioning
- Provides a clear description of an object’s dimensions .
-include ONLY NECESSARY dimensions
Redundant dimensions lead to
- Cluttered drawings
- Errors when changing dimensions
- Conflicts
Baseline dimensioning is
DImension lines are drawn from one reference point (called a datum)
Chain dimensioning
Dimension lines are drawn form one point to the next (like a chain)
Dimensioning circles, curves, and arcs
- To indicate radius, use R
before the measurement - To indicate diameter, use Ø
before the measurement
Time for presentation
OPEN PRESENTATION AND REVIEW DRAWINGS
