Global WF 975-LH Parts list manual

GLOBAL
WF
975-LH
Instruction & parts manual
www
.globalsew.com
[email protected]

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PRECAUTIONS BEFORE STARTING OPERATION
1. Safety precautions
I) When turning the power on, keep your hands and fingers away from the area around/under the needle
and the area around the pulley.
2) Power must be turned offwhen the machine is not in use, or when the operator leaves th e seat.
3) - Power must be turned offwhen tilting the machine head, installing or removing the "V" belt, adjusting
the machine, or when replacing.
4) Avoid placing fingers, hairs, bars etc., near the pulley, "V" belt, bobbin winder pulley, or moto r when
the machine is in operation.
5) Do not insert fingers into the thread tak e- up cover, under/around th e needle, or pulley when the
machine is in operation.
2. Precautions before starting operation
I) Do not operate the machine before lubricating it.
2) When a new sewing machine is first turned on, verify the rotational direction of the pulley with the
power on ( the pulley should rotate counterclockwise when viewed from pulley) .
3) Verify the voltage and (single or three) phase with those given on the machine nameplate.
3. Precautions for operating conditions
I) Avoid using the machine at abnormally high temperatures ( 35'C or higher) or low temperatures ( 5'C
or lower)
2) Avoid using the machine in dusty conditions.
CAUTIONS ON USE:
1. LUBRICATION (Fig.L Fig.2, Fig.3)
I) Before Starting the Sewing Machine
Prior to operation, apply adequate amount of oil
to the points marked with the arrows.
2) Lubricating the hook and hook shaft saddle
Shift the slide plate, and apply two or three drops
of oil every day to the hole shown with the arrow A.
And fore of five drops oil every day to the felt shown
with the arrow B.
3) Lubricating the feed bar
Prior to operation, apply two or three drops of oil
to the holes shown with the arrows C, D and E without
fail.
- 1 -
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2
2. ATTACHING THE NEEDLE (Fig.3)
Turn
OFF
the power
to
the
motor.
1)
Turn
the handwheel
to
move
the
needle
bar
up
to
its
highest
position.
®
3
2)
Loosen needle
clamp
screw(2). Hold needle
so
that
its
indented
part
A
faces
exactly
to
the
right.
3)
Insert the
needle
into
the
needle bar
until
it
will
go
no
further.
4)
Securely tighten
the
needle clamp screw
(2).
G)
4
3. ATTACHING/REMOVING
THE
BOBBIN CASE (Fig.5)
l) Raise lever (I) of
the
hook,
and
remove
the
bobbin case together
with
the
bobbin
in
it.
2)
Fit the
bobbin
case
into
the
hook driving shaft,
and
tilt the
lever:
4. WINDINGABOBBIN (Fig.6)
1)
Route the thread
in
the
order
of
A,
B
and
C before
winding
it
round
the
bobbin several times.
2)
Set bobbin presser (I)
down
to
bring
the
winder
in
contact
with
the
belt.
3)
Adjust screw
(2)
to
adjust the amount
of
thread
to
be
-2-
5
6
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would
round the
bobbin
so
that
the
bobbin
·
is
wound
with
thread
about
80%
of
its
capacity.
Turn
the
screw
clockwise
to
increase
the
amount
ofthread
is
evenly
wound
round
the
bobbin
.
4)
· If thread
is
wound
unevenly
wound
the
bobbin,
right
or
left
so
that
thread
is
evenly
wound
round
the
bobbin.
5)
The
moment
the
bobbin
has
been
wound
up
,
the
bobbin
presser
is
released,
and
the
bobbin
winder
will
stop
automatically.
5,
PLACING
A
BOBBIN
IN
THE
BOBIN
CASE
(Fig.7)
.
1)
Hold
a bobbin
so
that
the
end of
the
thread
wound
round
the bobbin
is
directed
to
the
right
and
put
it
into
the
bobbin
case.
2)
Pass
the thread
in
threading slit
(1)
in
the
bobbin
case,
route
it
under the
tension
spring
and
draw
it
out
from
notch.
(Caution) As long as the bobbin is correctly the thread
in
direction A makes
tJ:ie
bobbin rotate
in
direction B.
6.
HREADING
THE
MACHINE
HEAD
(Fig.8)
Thread
the
machine
as
illustrated
in
the
figure
in
the
order
of
(1)
through (13).
8
7.
ADJUSTING
THE
TITCH
LENGTH
(Fig.9)
7
Pf
■
n-
9
Turn
stitch length dial(!) counter-clockwise
to
bring
the desired
value
to
the
top
of
the
dial
so
that
the
value
is
aligned
with
the
pin.
Reverse feed stitching
I)
Push
down
feed
lever
(2)
-3-
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2)
The machine performs reverse feed stitching
as
long
as
the lever
is
held depressed.
3)
The moment you release the lever, the machine resumed the normal stitching mode.
8.
THREAD
TENSION
I) Adjusting the needle thread tension (Fig. I
0)
Turn tension nut
(I)
clockwise (toward A) to increase the needle thread tension, or counter clocking
(toward
B)
to decrease
it.
2) Adjusting the bobbin thread tension (Fig. I
I)
Turn tension screw (2) clockwise (toward .
C)
to increase the bobbin thread tension, or counter
clockwise (toward D) to decrease
it.
10
11
9.
THREAD
TAKE-UP
SPRING
(Fig.12)
I)
To
change the stroke
of
thread take-up spring (1)
(1) Loosen screw (2) in the stopper, and move stopper (3)
to
the right or left.
(2) Move the stopper to the right to increase the stroke
of
the thread take~up spring , or
to
the left to
decrease
it.
© ®
12
1)
To
change the tension
of
the thread take-up spring
Loosen nut (4) and screw (6).Turn spring shaft (5) counter clockwise
to
increase the tension
of
the
-4-
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spring,
or
clockwise
to
decrease
it
.
Fit
a screwdriver
in
the
spring
shaft
and
turn
it
until
the
desired
tension
is
provided.
10.
ADJUSTING
THE PRESSURE
OF
THE PRESSER
FOOT
(Fig.13)
1)
Turn
pressure spring regulator
(1)
clockwise
(toward
A)
to
increase
the
pressure of
the
presser
foot,
or
coµnter
clockwise (toward
B)
to
decrease
it.
2)
After
the adjustment, securely tighten
nut
(2)
ofthe regulator
11.
ADJUSTING
THE
PRESSER
FOOT
AND
THE
WALKING
FOOT
I)
Loosen
not
(I),
and
change
the
position ofthe
cam
rod
boss
accordingly.
(Fig.14)
Highest
position---The
stroke
is
maximized.
A
Lowest
position--- The
stroke
is
minimized.
Bo
2)
Alternate
vertical
motions of
the
walking
foot
and
presser
foot
(Fig.15)
The
alternate vertical strokes ofthe walking
foot
and
presser
foot
(I)
Loosen
screw
(2)
of
the
top
feed
cranL
(2)
Bring
the
thread take-up
lever
to
its
highest position,
and
lower
the
presser
bar
lifting
lever.
Move
top
feed
crank
(3)
to
left
A
to
increase
the
stroke of
the
presser
foot,
or
to
the
right
B
to
increase
it.
14
12.
HEIGHT
OF
THE
FEED
DOG
(Fig.16)
Feed
dog(l)
has
been
factory-adjusted
to
jut
out
I
mm
from
the
surface
of throat plate
(2).
When
the
feed
dog
height
needs
to
be
adjusted according the sewing conditions
or
after
the
feed
dog
is
replaced,
follow
the procedure described
below.
I)
Maximize
the
feed
dog
height.
2)
Loosen
screw
(3)
in
the
feed
dog.
3)
Adjust
the
feed
dog height comparatively higher
than
the
standard height ,
and
temporarily
fix
it
at
that
position.
-5
-
16
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4)
Now,
adjust
the
height
of
the
feed
dog
appropri
ate
l
y,
and
securely
tighten
the
screw
(3)
in the
feed
dog
.o
13. NEEDLE-TO-HOOK RELATIONSHIP (Fig.17)
1)
Set
the
feed
regulating dial
to
"3".
2)
Turn
the
handwheel
to
bring
the
ne
e
dle
bar
to
the
lowest position of its stroke,
and
loosen
needle
bar connection screw
(I)
.
3)
Determine
the
height
of
the
needle
bar:
The
standard
height
of
the
.needle bar
is
obtained
when
a distance
of
1.7mm
is
provided between
the
top
end
of
the
needle eyelet
and
blade
point
(6)
of the hook
when
the needles ascends l
c-i
2.4mm
from
the lowest position
of
its
stroke.
0-0.05nm
4)
Determine the position
of
the
hook:
Loosen
17
screw
(3)
in
the gear cover
(2),
remove gear cover
(2)
and
loosen
screws
(4)
in
the
large
bevel
gear.
-
5)
In
the
state described
in
3), loosen screw
(5)
in
the
hook
driving
shaft
saddle
and
move
the
hook
driving
shaft saddle
to
the right or left until a
cle
r
~ance
ofOto
0.05
mm
is
provided
between
the
blade
point of
the
hook
and needle (7) .After
the
adjustment, securely tighten
the
screw.
6)
Then, al
ign
the blade point
of
the hook
with
the
center ofthe
needle,
and
tighten
screw
(4)
in
the
gear.
14.
ADJUSTING THE NEEDLE
GUARD
OF
THE HOOK (Fig.18)
After
replacing the
hook,
be
sure
to
confirm the position of
the
needle
guard.
The
standard
position of
the
·
needle
guard
is
obtained
when
needle guard
(2)
lightly
comes
in
contact
with
the
si
de
face
of
need
le (])
as
illustrated
in
the
figure. If
not,
adjust the position
of
the needle guard
by
bending
it
accordingly.
I)
To
bend
the needle guard inward,
apply
a screwdriver to
the
outside
of
the
needle
guard.
2)
To
bend
the needle guard outward,
apply
a screwdriver
to
the
needle
guard.
®
CD
~..,__®
0-
0.
05mm
@
0.1-0.
15mm
18
19
- 6 -
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15. ADJUSTING
THE
BOBBIN CASE
OPENNING
LEVER
(Fig.19)
I)
Turn
the
hand
wheel
in
its
normal
rotational direction
to
bring
bobbin
case
opening
lever
(I)
to
its
back
end
position.
2)
Turn
bobbin
case
(2)
in
the
direction of
arrow
B
until
stopper
(3)
comes
in
contact
with
the
groove
in
throat
plate
(4).
3)
Loosen
screw
(5)
in
the
bobbin
case
opening lever adjustment
plate
(6)
in
the
direction
of
the
arrow
so
that
a
clearance
of
0.1
to
0.15
mm
is
protruding section Aof
the
bobbin
case.
16. ADJUSTING
THE
LONGITUDINAL
POSITION
OF
THE
NEEDLE
BAR
FRAME
(Fig.20)
1)
Adjusting
the
relationship
between
the
top
feed
rod
and
presser
bar
(1)
Set
the
feed
regulating
dial
to
its
minimum
value
(2)
Loosen
clamping screw
(1)
in
the
needle
bar
frame
rear
arm,
and
adjust
the
clearance
between
the
top
feed
rod
and
the presser bar
to
7.5
mm
(Caution) Take care not to allow any play
in
needle bar frame (2)
2)
Adjusting
the
relationship
between
the
feed
dog
and
the
needle
bar
( 1) Set
the
feed
regulating
dial
to
its
minimum
value.
(2)
Loosen
clamping screw
(3)
in
the
feed
rock
shaft
crank.
(3)
Adjust
the
position of
the
feed
dog
so
that
the
needle
comes
to
the center ofthe
needle
hole
in
the
feed
dog
(slightly closer to
the
operator).
17. SAFETY MECHANISM (Fig.21)
If
the
thread
is
caught
in
the hook
while
the
sewing
machine
is
in
operation; the safety
mechanism
actuates
to
idle
the
lower
sprocket
only
If
the
thread
is
caught
in
the
hook
while
the
sewing
machine
is
in
operation, the safety
mechanism
actuates
to
idle
the
lower
sprocket
only.
1)
How
to
reset
( 1)
Remove
the
thread
caught6
in
the
hook
(2)pressing
pt,1sh
button
(1),
strongly
turn
the
pulley
in
the
direction opposite
to
its
normal
rotational
direction.
2)
Safety
load
Turn
adjustment screw
(2)
in
direction A(clockwise)
-7
20
21
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