1. Communication Technology
IOT POLY ENGINEERING
2-11
DRILL
Turn in your 3-view assignment (include NAME)
Match the type of Technical Graphics below with its type:
Isometric
Section
Standard View
Development
Perspective
Oblique
Cut-away Pictorial B C A E B C F G D A D E F
Communication Technology G

2. Technical Graphic Communication
IOT POLY ENGINEERING
2-11
TECHNICAL GRAPHICS
Which of the following images are parallel projections?
Technical Graphic Communication

3. Technical Graphic Communication
IOT POLY ENGINEERING
2-11
[REVIEW]
SKETCHES 1
No drawing tools
Technical Graphic Communication

4. Technical Graphic Communication
IOT POLY ENGINEERING
2-11
[REVIEW]
MULTI-VIEW DRAWINGS 2
Standard Views
Sectional Views
Auxiliary Views
Developments
Working Drawings
Technical Graphic Communication

5. [REVIEW] PICTORIAL DRAWINGS 2-11 3 Technical Graphic Communication
IOT POLY ENGINEERING
2-11
[REVIEW]
PICTORIAL DRAWINGS 3
Show a likeness of an object as viewed by the eye
Isometric
Perspective
Oblique
Exploded Assembly
Cutaway Pictorial
Technical Graphic Communication

6. Technical Graphic Communication
IOT POLY ENGINEERING
2-11
CLASS STANDARDS
Line Weights
Line Types
Dimensioning
Scales
Technical Graphic Communication

7. Technical Graphic Communication
IOT POLY ENGINEERING
2-11
LINE WEIGHTS
Four Weights in this class:
Light: not noticeable from 2’ (nearly invisible)
Medium: just noticeable from 2’
Heavy: obvious from 2’ (final weight for most objects)
Very Heavy: only used for borders
Technical Graphic Communication

8. CLASS STANDARDS 2-11 Create the following chart in your notebook
IOT POLY ENGINEERING
2-11
CLASS STANDARDS
Create the following chart in your notebook
Name
Example
Weight
Uses
Technical Graphic Communication

9. CLASS STANDARDS LINE TYPES 2-11 Construction/Layout Lines Guidelines
IOT POLY ENGINEERING
2-11
LINE TYPES
Construction/Layout Lines
LIGHT WEIGHT
ALL lines begin as these
DO NOT ERASE (unless there is a measuring error)
Guidelines
Used for LETTERING
CLASS STANDARDS

10. CLASS STANDARDS LINE TYPES 2-11 Object Lines: Hidden Lines:
IOT POLY ENGINEERING
2-11
LINE TYPES
Object Lines:
HEAVY WEIGHT
The final line type for most
objects
Hidden Lines:
Everything must be represented in each view, whether or not it can be seen
Interior and exterior features are projected from view to view in the same way
Parts not seen on the exterior of a view are drawn with hidden lines – short DASHES
CLASS STANDARDS

11. CLASS STANDARDS LINE TYPES 2-11 Centerlines: MEDIUM WEIGHT
IOT POLY ENGINEERING
2-11
LINE TYPES
Centerlines:
MEDIUM WEIGHT
Centers of symmetrical objects, including circles
Used to locate views and dimensions
CLASS STANDARDS

12. CLASS STANDARDS LINE TYPES 2-11 Section Lines: MEDIUM WEIGHT
IOT POLY ENGINEERING
2-11
LINE TYPES
Section Lines:
MEDIUM WEIGHT
Show materials in cross-section views
Different materials use different section lines
CLASS STANDARDS

13. CLASS STANDARDS LINE TYPES 2-11 Extension Lines: Dimension Lines:
IOT POLY ENGINEERING
2-11
LINE TYPES
Extension Lines:
MEDIUM WEIGHT
Extend from objects
Used for dimensioning
Dimension Lines:
Go between extension lines
CLASS STANDARDS

14. CLASS STANDARDS DIMENSIONING 2-11
IOT POLY ENGINEERING
2-11
DIMENSIONING
2 things are needed to describe an object completely:
Shape
Size
Dimensioning: Size description
Units are required
Decimal or Fraction
Dimensions read from bottom or right side
Include:
Extension line: begin 1/16” away from object and extend 1/16” beyond Dimension Line
Dimension line: use arrowheads, guidelines, and LETTER
CLASS STANDARDS
PREFERRED

15. CLASS STANDARDS SCALES 2-11 Objects to be drawn may be small
IOT POLY ENGINEERING
2-11
SCALES
Objects to be drawn may be small
Nanotechnology machine parts, for example
Objects to be drawn may be big
Buildings, bridges, airliners, oil rigs, trucks, cars
Full Scale drawings will not always fit on a sheet of paper
Scale down or scale up
½” = 1’-0” ¼” = 1’-0” ” = 14’-0”
Scale must be indicated in your title block
Architect’s Scale, Engineer’s Scale, Metric Scale make scaling drawings simpler.
CLASS STANDARDS

16. CLASS STANDARDS SCALES 2-11 ½” = 1’-0” – Every ½” represents 1’-0”
IOT POLY ENGINEERING
2-11
SCALES
½” = 1’-0” – Every ½” represents 1’-0”
1’-0”
2’-0”
3’-0”
4’-0”
0’-6”
1’-6”
2’-6”
3’-6”
0’-3”
0’-9”
1’-3”
1’-9”
2’-3”
2’-9”
3’-3”
3’-9”
CLASS STANDARDS

17. CLASS STANDARDS SCALES 2-11 ¼” = 1’-0” – Every ¼” represents 1’-0”
IOT POLY ENGINEERING
2-11
SCALES
¼” = 1’-0” – Every ¼” represents 1’-0”
2’-0”
4’-0”
6’-0”
8’-0”
1’-0”
3’-0”
5’-0”
7’-0”
0’-6”
1’-6”
2’-6”
3’-6”
0’-3”
0’-9”
1’-3”
1’-9”
CLASS STANDARDS

18. Complete the scales worksheet (front and back) Use a straightedge
IOT POLY ENGINEERING
2-11
CLASSWORK / HOMEWORK
Complete the scales worksheet
(front and back)
Use a straightedge
Use the correct scale
Measure and draw precisely
CLASS STANDARDS