graphic communication @ boclair academy
INTRODUCING
graphic communication @ boclair academy
WHAT ARE THEY ?
SEE SOME EXAMPLES
HOW DO YOU DO IT ?
EXERCISES
graphic communication @ boclair academy
WHAT ARE THEY ?
tangency is . . .
. . . A PROCEDURE WHICH ALLOWS YOU TO
INCORPORATE CURVES ACCURATELY INTO
YOUR 2D TECHNICAL DRAWINGS.
the principles are . . .
. . . THE RULES WHICH DICTATE HOW
TANGENCY IS DONE
graphic communication @ boclair academy
SEE SOME EXAMPLES
stuff you could not draw unless you understood tangency . .
light bulb
bbc 2 logo
mobile
crash helmet
phone
grand prix racing circuit
bottle
graphic communication @ boclair academy
HOW DO YOU DO IT ?
There are four common problems you have to learn to deal with. They are . . .
tangent at a right
angle
tangent at an
acute angle
graphic communication @ boclair academy
tangent at an
obtuse angle
tangent with two
curves
HOW DO YOU DO IT ?
tangent at a right angle
draw
complete
set
measure
where
the
two
compass
they
faint
30mm
the
tangent
intersect,
lines
along
atdraw
30mm
parallel
each
and
the
to
of
is
faintly
from
draw
each
two
line,
lines
atwith
athis
right
faint
horizontal
scribe
the
and
two
the
centre
vertical
arc
as
of the
shown
lines
arc
angle
line
tothe
establish
out
atoriginal
a these
right
the
corner
angle
right angle
graphic communication @ boclair academy
HOW DO YOU DO IT ?
tangent at an acute angle
draw
complete
set
measure
where
from
faintly
the
two
compass
each
they
faint
30mm
the
draw
line,
tangent
intersect,
lines
two
along
atdraw
30mm
lines
parallel
with
each
athis
at
faint
and
the
an
to
of
is
scribe
line
the
the
out
two
the
centre
at
other
original
arc
aacute
these
right
as
of
two
the
shown
angle
lines
arc
right angle
graphic communication @ boclair academy
HOW DO YOU DO IT ?
tangent at an obtuse angle
draw
complete
set
measure
where
from
faintly
the
two
compass
each
they
faint
30mm
the
draw
line,
tangent
intersect,
lines
two
along
atdraw
30mm
lines
parallel
with
each
athis
at
faint
and
the
an
to
of
is
scribe
line
the
the
out
two
the
centre
at
other
original
arc
obtuse
a these
right
as
of
two
the
shown
angle
lines
arc
right angle
graphic communication @ boclair academy
HOW DO YOU DO IT ?
tangent between two curves
now
faintly
draw
scribe
from
you
indraw
where
can
the
twotwo
line
arcs
inthey
the
circles,
the
60mm
centres
intersect,
required
each
from
of
scribe
the centres
an
with
arc
a arc
radius
40mm
of two
the
in heavily
circles
radius
20mm
R40
R20
graphic communication @ boclair academy
FINISHED
graphic communication @ boclair academy
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