19.
WINDING
INSTALLATION
AND
ADJUSTMENT(Fig. 10)
The
bobbin winder pulley should Align
with the V - belt
and
there should
be
some
clearance between them . When the bobbin
winder stop latch lever
is
depressed, the
V-
belt should
be
in
touch with the bobbin
winder bulley
in
order that the bobbin winder
pulley
can
be
driven
by
the V - belt.
The
thread wound
on
the bobbin should
be
neat
and
tight if not tight , adjust the
winding tension
by
turning the tension stud
nut (A) of the bobbin winder tension bracket,
when the thread wound
on
the bobbin does
not present a cylindrical
shape
as
shown
in
Fig.
10
(a), Loosen the set screw(
B)
of the
bobbin winder tension bracket
and
move the
bracket (C) leftward or rightward, if the thread
is
wound
as
shown
in
the figure (b), move
the bracket leftward
or
rightward of wound
as
shown
in
the figure(c) , move it leftward .
After positionting the bracket adequately,
tighten the set screw (B)
Do
not overfill the bobbin,
The
optimum
wound length of the thread will
fin
about
80% of the bobbin capacity .
This
can
be
adjusted
by
the screw(E) of the bobbin
winder stop latch.
110.
ADJUST
THE
PRESSURE
OF
PRESSER
FOOT(
Fig.
11
)
Pressure of the presser foot
is
adjusted
in
accordance with thickness of materials to
be
sewn.
First loosen the lock nut
(A),
for
heavy
materials, turn the pressure regulating thumb
screw
as
shown
in
Fig.
11
(a) to increase the
pressure I while for light materials, turn the
pressure regulating thumb screw
as
shown
in
Fig.
11
(b) to decrease the pressure , the
tighten the lock nut (A),
The
pressure of
the·
presser foot
is
recommended to
be
less
as
long
as
normal
feeding
is
ensured.
4
10
I
CD
11
