COMMUNICATION
SKILLS
Introduction
to graphical communication
• Definition: Communication
means the transmission of ideas, experiences or messages between people. You
communicate when you talk to someone, write or draw pictures. We will look at
graphic communication, all drawing that we will be doing should be drawn on
paper with bordered sheet and a title strip.
Purpose
of graphics
The purpose
of graphics is to develop ideas and communicate them. Communication by pictures
and by drawing is called graphic communication. People such as engineers,
technicians, graphic designers and architects use drawing to explain how things
work (such as machines). An example of a tailstock on a lathe is drawn in an
illustration on the next page, which will then allow an engineer to make the
object.
A tailstock
Examples of graphic communication are advertising on billboards and magazine layouts
1.Introduction:
lines
Lines are
regarded as the building blocks for all drawings. Line types and line weight
are carefully selected by the designer and placed on drawings. In the world of
work there are set standards of practice for the varying use of line types and
line weight that follow the South African Bureau of Standards (SABS) code of
practice for Engineering Drawing (SANS).
2.
Conventions: Types of lines
Different
types of lines have different meanings in graphic communication. The following
table explains the different types of lines:
Lettering
and figuring
All
characters on a drawing must be legible and consistent. Make sure that you use
the 3mm and 5mm guidelines to do your printing. All letters need to be
consistent with the guidelines that we use : All 5mm printing is for the titles
and all 3mm printing is for sub-titles.
This is an
example of a bracket, it illustrate the center line, hidden details and
outlines.
Dimensioning
v Dimension lines are used to indicate
the sizes of various parts of an object. These lines must be light. The
required sizes of features are shown through the use of dimensions. With linear
dimensions, two parallel lines, called ‘extension lines’, spaced at the
distance between two features, are shown at each of the features. A line
perpendicular to the extension lines, called ‘dimension lines’, with arrows at
its endpoints, is shown between, and ending at, the extension lines. The
distance is indicated with numbers at the midpoint of the dimension line.
v Dimension are shown with dimension
lines, extension lines and leader lines. All three line types are drawn
continuous and thin.
