Global WF 9995-SK Parts list manual

GLOBAL
WF
9995-SK
Instruction & parts manual
www.globalsew.com
[email protected]

CONTENT
Operation Instruction
I.
Main
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1
2. Operation preparation•
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1
3.
Installing
th
e motor·
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. 1
2
4.
Co
nn
ecting the clutch
lev
er
to
the pedal ··
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5. Insta
llin
g belt guard
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6.
Installing the bobbin winder
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7. Lubrication
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8.
Trial run
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9.
Hook
oil
amount adjustment
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. 5
10
.
Oil
pump supply adjustment
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. 5
I I. lnstalUng the needle
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6
12. Coordination among needl
e,
thread
and
sewing materials•··
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13.Threading the needle thread •·
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14
.Winding adjustment .
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15.
Setting the stitch length and controlling the reverse sewing
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16
. Setting the position of pres
se
r bar
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9
17
. Adjusting the
pr
essu
re
of presser foot
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1
8.
Adjusting the
th.read
tension
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.. 9
19.
Adjusting
th
e thread take-up spring
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10
20.Adjusting the tension
of
needle thread
and
bobbin thread
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11
12
2
1.
Timing
adj
ustment between the needle
and
th
e rotating hook.
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13
22.
Installing
and
removing rota
tin
g hook
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23
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In
stalling
feed
do
g ..
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24.
Feed dog horizontal adjustment
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25.
Stitch
len
g
th
error adjustment
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26
. Feed timing adjustment
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27.Adjusting
the
tension releasing mechanism
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28.
Upper
feed
adjustment ...
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17
29.
Adjusting presser foot alternate lift mechanism
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30.
Adjusting the lift amount of presser foot with walking presser
foo
t
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31
. Adjusting the clearance between presser
foot
and
wa
lk
ing presser
foot
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32. Periodical chcan
in
g
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33
. Vertical
edge
trimmer
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23
Parts Catalogue
I.
Arm
and
bed
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24~
27
2.
Arm
shaft vertical shaft needle bar and thr
ea
d take-up .
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28~
29
3.
Fee
d dog lift
and
thread looping ...
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4. Feed adjustment •·
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5.
Presser
foot
.
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6.
Upper feed
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7.
Edge
trimmer
mechanism
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40~4
I
8.
Oi]pump
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42~43
9.
Oil reservoir and accessories ·
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44~45
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

1. MAIN SPECIFICATIONS
Typ e
Material
Medium and heavy duty
Wdlx .sewi ng speed 2000spm
Max .stitch length
8mm
Ma x .thickness
&mm
Alt ernate presser fool lift volume 3.5 -5. Smm
Needle
DPx17(20#~23#)
Pres s er
. by hand
8mm
foo lift
by knee
16mm
Hook Au to-lubricating big r ota t in ghook
Lubrication
Auto lubrication
Motor
power 370W (use for wewing)
2. PREPARATION
(1) Cleaning the machine
Before leaving the factory, the machine parts are coated with
rust-preventive grease, which may be hardened and contami-
nated by dust during storage
and shipment. This grease must
be removed with gasoline.
(2) E-xamination
Though eve rymachine is confirmed by strictinspection and
test before leaving the factory,the machine parts may be loo se
or deformed after long distance transporation with jolt. A
thorough examination must
be performed after cleaning the
machine.
Tum the balance wheel to see if there is running
obstruction, parts collision,
uneven resistance or abnormal
noise.
If these exist, adjustment must be made accordingly
before
run - in operation.
.. INSTALL THE MOTOR (Fig.1)
Align Motor Pulley Groove (B) and Balance Wheel Groove
(A) by moving the motor leftward or rightward.
- 3-
1
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

4.
CONNECT THE CLUTCH LEVER WITH THE PEDAL(Fig.2) I
a. The optimum tilt angle ofpedal (A) is approximately 20 - 30
deg.
b. Adjust Clutch Cover (D) so that Clutch-Lever (C) and Draw Bar (B) run in line.
2
~
c. The balance wheel should rotate counter-clockwise when viewed from the outside of Balance Wheel (G). The direction ofthe
motor pulley rotation can be reversed by reversing (turning over 180 deg .) the power plug of the motor.
d. Adjust the tension ofV-belt (F) by turning Motor Vertical Position Screw (E). The proper tension of the V-beltis a slack of 10-20
mm when the belt is depressed
5. / INSTALLING BELT GUARD (Fig 3)
3
The belt guard should be installed for safety.
-4-
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

6.
4)
/INSTALLING THE
BOBBIN
WINDER
(Fig
4)
Align pulley(B)
of
the bobbin winder with the outside
of
the
belt, and
there
should
be
a
proper
clearness
between
them, so
that
pulley
(B)
can
be
contacted
with
the
belt
when stop latch thumb lever (A) is depressed, there
by
the
belt
drives
prlley
(B) white the
machine
running,
the
bo-
bbin
winder
should
be
parallel
with
belt
slit
(E),
of
the
bable, the fasten with two wood screw(D).
7.
_____
__
_
(OILING
(Fig
5)
1.
Required amount
of
oil.
Line(A)on the oil reervoit: Max.oil level.
Line(B)on the oil reservoir: Min.oil level.
lf
oil level goes
down under line(B), oil cannot bedistributed to each part
of
the machine, thus cauaing the parts a seizure.
2.
Replenishing
Always use only No.18 special machine oil for high speed
sewing.
Be
sure to replenish oil to Lue (A) before starting operation.
3. Replacing oil
4
5
To replace oil, remove Screw(C)to drain oil. After completely draining off
oil.
clean the oil reservoirand securely tighten
Screw(C), then fill the reservoir withfresh oil.
-5-
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

8 . .. _ . I RUN-IN OPERATION(Fig.6)
When the machine left out of operation for a quite long
time and used again, remove the red rubber plug on top
of the machine head, oil it thoroughly, the lift the pre-
sser foot and
run at a low speed of 1000~1500spm,
observe the sparkling condition through oil windew(c),
as the lubr.ication is well, keep the running test at the
low speed about 30 minutes, then increase the speed
gradually, after months running
to perfect its perfonnance,
then increase up to proper sewing speed.
-6 -
6
0
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

9.
/LUBRICATION
ADJUSTMENT(Fig.7)
A.
Adjusting
oil
pump.
In
ordinary operation, adjustment is not required for the
oil pump.
If
oil splashing does not occur in the oil check
window when the machine runs at a low,speed ( approx.
2000spm),reduce the clearance
of
the by-pass hole.
B.Adjusting the lubrication ofrotating book.
The lubrication
of
the rotating hook can be adjusted
by
Oil
Adjusting Screw
(A)
as
follows:
7
1)
Turn Oil Adjusting Screw
(A)
clockwise to increase oil and tuen Oil Adjusting Screw
(A)
counter clockwise to decre-
ase oil.
2) Oil Adjusting Screw ( A ) adjusts oil amount within
5
turns. When Oil Adjusting Screw ( A )
is
fully tightened, oil amo-
unt is maximum.
3)
Readjustment depends
on
temperature, sewing speed and the like. In practice, oil amount can bejudged as follows:
remove the throat plate and place a piece
of
paper on instead,
run
the machine for about 20 seconds, then check the oin
splashed on the paper.
10.
/OIL
PUMP
SUPPLY
ADJUSTMENT
(Fig
8)
Generally no adjustment is
for
oil pump, When the ma-
chine is running at a low speed, observe the oil screen.
If
no
oil splashing,close the clearance.
-7-
0.5-1.0
8
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

11.
_ 1
REPLACE
NEEDLES
(Fig
.
9)
Turn the balance wheel to
lift
needle bar to the upper
end
of
its stroke. Loosen Needle Clamp Screw A.While
keeping the long groove
of
the
needle
leftward fully
insert the needle shank up to the bottom
of
the needle
socket Then tighten Needle Clamp Screw
A.
Note: Fig.(b):insufficient insertion.
Fig.(c):wrong direction oflong groove.
(Long
groove)
X
b
9
a
X
C
12.
/
COORDINATION
AMONG
THE
NEEDLE
THE
THREAD
AND
THE
MATERIAL(Fig10)
8
The needle thread is left-twisted, the bobbin thread is left or righHwisted. Holding the thread, twist it with right hand
in
the direction
of
arrow shown in Fig 10,
if
it is tight, it is left-twisted, co-ntrarily, it is right-twisted.
The needle is
DPxl
7 20#~24# (JK-6320CXDPxl7 25#), the needle number must be fitted for the materials. Sewing too
heavy the weight
of
rna-terials,the needle would be breaking and skipping stitch and thread breaking for its too thin,
if
the needle is too thick,
it
would damage the clothes for its large needle hole. There for, the selectionofneedle and
thread must be fitted
to
the materials.
-8-
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

13
THREADING(Fig.11)
11
When threading the needle thread, raise the needle bar to its highestposition, lead the thread from the spool and pass it
in
the orderinstructed.
(1) Lead the thread downthrough the three-eye thread guide
(Don
the top.
(2) Pass down
tbru
the left hole
of
thread
retainer@,
then down thru the lower hole
of
thread retainer@.
(3) Pass .down
tbru
between the two tension disc ® ,
(4) Pass up
thru
the hook
of
thread take-up
spring@.
thru thread regulator@, thru thread
guide®and
up thru the hole
of
thread take-up lever
(j) .
(5) Down thru thread guide ® ,
® ,
and needle bar thread
guide@,
then pass the thread from the left thru the eye
of
needle@,
draw outthe thread approxlOOmm from the needle eye.
When drawing the bobbin thread, hold the tip
of
the needle thread by hand, turn the balance wheel to lower the needle
bar and then to lift it to its highest position. Pull the needle thread and then the bobbin thread is drawn
up.
put the tips
of
the needle and bobbin thread toward front under the presser foot.
14 I WINDINGADJUSTMENT(Fig.12)
12
M
~
a b
C
- 9 -
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

1)
The
wound
bobbin thread should
be
neat
and
tight,
if
not,
adjust
the
winding
tension
by
turning Tension Stud
Nut(A)
of
bobbin
winder
tension
bracket.
Note:
nylon
or polyester thread should
be
wound
with
little tension, otherwise,
Bobbin
(D)
might break or
defonn.
2)
When
the
wound
thread
layer
does
not present a cylindrical shape
as
shown
in
Fig7(
a),
loosen
Set
Screw
(
B)
ofbobbin
winder tension bracket and slide Bracket
(C)
leftward or rightward
If
thread is
wound
as
shown in Fig,7
(b),
move
the
bracket lightward,
but
ifthread is
wound
as
shown in
Fig.
7 (c
),
move
the
bracket leftward.
After
adequately
positioning
the
bracket, tighten Set Screw(B).
3)
Do
not
overfill
the
bobbin.
The
optimum length of thread will fill
about
80%
of
bobbin
capacity. This can
be
adjusted
by
Adjusting Screw(E) ofbobbin winder stop
latch.
15
/
ADJUST
THE
PRESSURE
OF
PRESSER
EOOT(Fig.13)
Stitch length
can
be set
by
turning stitch length regulating
dial (A). The figures on the stitch length regulation dial
plate
(B)
indicate
the stitch length.
Reverse sewing can
be
obtained when
feed
reverse lever
(C)
is depressed and forward sewing can
be
restored
auto-
matically
when
feed reverse lever
(C)
is released.
16 14)
-10-
13
14
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Thread
take-up
section
adopts
woolen thread oiling. after
long
time
ofuse,
its
function
lost,
so
replace
with
a
new
one.
<D
Open
the
face
plate,
remove
the pressure sere
screw,
lock
nut
and
presser
bar.
@
Renove
Hinge(A)
and
Lever (B)
®
Draw
out
Oil
wiick(C).
©
Loosen
the
wick
fix
screw
on
the
arm
top,
and
take
out
Set
Plate
(D).
®
Replace
with
a
new
one.
@
Installing
is
areverse sequence.
17.
/
ADJUST
THE
PRESSURE
OF
PRESSER
EOOT(Fig
.
15)
I
Pressure ofpresser
foot
is
to
be
adjust in accordance
with
thickness
ofmaterials
to
be
sewn.
First loosen
Lock
Nut
(A
).
For heavy materials, turn
the
pressure regulating
thumb
screw
as
shown in Fig.l
0(
a )
to increase
the
pressure,while
for
light materials, turn
the
pressure regulating
thumb
screw
as
shown in Fig.10( b )
to decrease
the
pressure.Then tighten Lock Nut(
A)
.
The pressure ofpresser
foot
is
recommended
to
be
less
as
long
as
normal
feeding
is
ensured.
17) /ADJUSTTHREADTENSION(Fig.16, 17)
-11-
15
16
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In
principle,thread tension is to be adjusted
in
accordance
with materials,thread and otherfactors.
In
practice,
thread
tension is adjusted according to the
stitches obtained.
The
needle thread tension should be
adjusted with reference
to
the bobbin thread tension.Turn
Tension Spring Regulaating Screw (A)
of
bobbin case
clockwise for
more
tension.or
turn
the screw counter-
clockwise for less tension.
It
is common practice to test the bobbin test the bobbin
thread tension as shown
in
Fig.12 . Hold the end
of
the
thread from delivery eye.
If
the
bobbin
case
is falling
slowly, the proper tens~on is obtained. The needle thread
tension can
be
adjusted by setting (1) the take-up spring
tension.(2) the thread take-up spring stroke and (3) ten-
sion spring.All these adjustments will be described in the
following.
19)
/ADJUST
THREAD
TAKE-UP
SPRING(Fig.18,
19)
1-----------l
A
17
18
The
normal sewing range
of
thread take-up spring is 5-8mm. For sewing light weight materials (short stitch), weaken
the spring tension and widen
the
sewing range
of
spring, while for sewing heavy weight materials, strengthen the spring
tension and shorten the sewing range
of
spring.
1)
Adjusting the thread take-up spring·tension(Fig.18).
Loosen
tension
stud
set
screw (A),
tum
tension stud (B) clockwise to make the spring
get
more tension, or
tum
the
tension
stud
counter
clockwise
to
make
the spring get less tension, After adjustment,
Be
sure to tight tension stud
set screw (A).
The
method
of
adjustment:
Loosen
set
screw (A) first, then
to
turn tension stud (B) counter clockwise
to
release the tension
of
thread take-up
spring (C) to zero, and to turn tension stud
(B)
clockwise until spring (C) just comes into contact with the stop slot
on
the thread take-up spring regulator, then to further turn tension stud
Cl;l)
counterclockwise by 1/2
tum
After adjustment,
tighten tension
stud
set screw (A).
-12-
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2)
Adjusting
the
thread
take-up
spring stroke
Loosen Set Screw ( B
),
turn
Stud ( C ) clockwise
to
incr-
ease the stroke
or
tum Stud ( C ) counter-clockwise to
decrease the stroke. After the
adjustment
tighten Set
Screw (
B
).
I
19
.---
- -
--
-\A
~;.,,,,.~-
--
---1.
C
-
--®
Before leaving the factory, the thread take-up spring has properly been adjusted, Readjustment is needed only in the
case
of
special material or special thread.
21,
22)/ADJUSTTHREAD
GUIDE
AND
THREAD
TENSION(Fig.20,
21,
22)
-13-
a
b
C
d
e
20
21
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The position
of
the thread guide affects stitch tightness
and
therefore
must
be
adjusted
according
to sewing
matelials and sewing conditions.
Thread Leftward Center Rightward
guide
position
~
~
~
Material Heavy
Medium
Light
weight
Fig15 shows different stitch forms. Normal stitch form
should be
as
shown in Fig.20(a). When abnonnal stitches
cause
puckering and thread break-age, the tension
of
ne
edle
thread
and
bobbin
thread
must
be
adjusted
accordingly.
22
t
=G
1)
In
case needle thread
tension
is
too strong or
bobbin
thread tension
is
too weak, as shown
in
Fig.20( b
),
turn
the thumb
nut
counterclockwise to decrease the needle thread tension,
or
tighten the tension spring regulating
screw
of
bobbin
case
to
increase
the
bobbin
thread tension (See Fig.21)
2)
In
case needle thread tension
is
too weak or bobbin thread tension is too strong, as shown in Fig.20(c), turn the
thumb
nut
clockwise
to
increase
the
needle
thread tension.
or
loosen the tension
spring
regulating screw
of
bobbin case to decrease
the
bobbin
thread tensio.
3)
In
case
of
the
stitch
forms as shown
in
Fig.20(d) and (
e ),
adjustment can be made with reference to the above
means.
21
23, 24,
25,
26)
/
TIME
NEEDLE
TO
ROTAING
HOOK
(Fig.23,
24, 25,
26)
23
1.
Adjusting
the
needle position ( See
Fig.23
)
1) Turn balance wheel by hand to bring Needle
Bar
(C)
to the lowest position
of
its stroke.
2)
Remove rubber plug from Face Plate (A).
3)
Loosen Set Screw(B)
of
needle bar adaptor.
4) Move Needle
Bar
(C)vertically to adjust needle timing.
5)
After the adjustment, tighten Set Screw
(B)
and put in the rubber plug. The standard needle timing (SeeFig.24) is to
align Timing
Mark
(B)
on the needle bar and thebottom
of
Needle
Bar
Bushing (A) and meanwhile align the Inner
Surface
(E)
of
the hook and the center
of
Needle Eye
(D)
when the needle
bar
gets down to its lowest position.
-
14
-
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Feed
dog
horizontal
Adjustment
(Fig
30)
Feed dog is 0.8~1.2mm above the surface
of
throat plate
horizontally.
When sewing condition requires tilting, adjust like this:
Looseriscrew (A).
Press against
the
slot
of
eccentric
shaft with a screw
driver
to
turn eccentric shaft left and right.
Tighten screw (A).
The front
of
feed dog is higher, which can prevent per-
ckering and no skiipping.
The
front
of
it
is
lower,
which
can
prevent
maferial
sliding and
no
breakage
of
bobbin thread.
/
Stitch
length
error
adjustment
(Fig
31)
Loosen screw (A), and turn stitch length adjusting cam
(B).
Turn clockwise: forward sewing, stitch length enlarged;
reverse sewing, stitch length shorten.
Turn
counter-clockwise: forward sewing stich length
·
shorten; reverse sewing, stich length enlarged.
-17-
0
30
31
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26,
/
Feed
timing adjusting
(Fig
32
33
34)
1.
Standard
position
Turn balance wheel
to
lower Feed dog (A) till
it
is hor-
izontal with the surface (B)
of
thrat plate, at the moment,
the tip of needle (C) should be horzontal with the surfaces
of
throat plate
and
feed
dog.
A;djustment
cam be done
by
adjusting the position
of
feed
cam and feed dog lift
cam.
2.
Installing feed dog lift
cam
(See Fig 33)
Open
the
back side cover,
turn
balance wheel
by
left hand
counter-clockwise, take screw Aas for the standard, the
center ofscrew B is slighthy a little lower than the center
of
screw
A.
3.
Installing
feed
cam
(See
Fig
34)
Continously turn balance wheel, take screw (B) as for
standard, the center
of
screw (C)is slightly a little higher
than the center
of
screw(B).
-18-
I
32
32
32
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2.
Adjusting
the
hook point timing
Timing
of
needle motion to rotating hook motion has a
great effect on sewing performance. The standard hook
point timing (See Fig.25) is to align Hook Point (D) and
Needle Centerline
(C)
when Needle Bar (B) is lifted
by
2.2mm from the lower end
of
its stroke.Besides. Hook
Point
(D)
should
be
1.0-1.Smmabove the upper end
of
needle eye
(E).
When adjusting the hook point timing, also notoce that
the clearance between the
bottom
of
needle notch and
Hook Point (C) should be approx.0.05mm (See Fig.26)
22
. I
REPLACE
ROTATING
HOOK
(Fig.27)
-
15
-
24
25
27
0.5-0.7mm
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1)
Lift needle bar
to
the highest position
of
its stroke.
2) Remove throat plate, take down needle and bobbin case.
3) Loosen Screw (
C)
of hook positioner and take down Hook Positiciner
(A).
4)
Loosen two Screws (
D)
of
rotating hook.
5) Turn balance wheel
to
raise feed bar to its highest position, then take down the rotating hook by turning it away
from feed bar.
6)
Installing the hook can be done in reverse sequence. Note that Needle ( B ) and the convex surface of
Hook Positioner
(A)
should align with a clearance
of
0.5-0.7 mm between them.
23
28) / ADHUST THEPOSITION
OF
FEED DOG (Fig.28, 29)
I
inFig.28.
1) Fully advance the feed dog toward the front end
of
the throat plate slot.
2)
Loosen Feed Rock Shfat Crank Screw (A). See Fig.
29(b).
3) Move Feed
Bar
(B)
in
the direction shown by the
arrow in Fig. 29 (a) to adjust the feed dog
position.
4)
After the adjustment, be sure
to
tighten Screw (A).
-16-
28
29
a b
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27
ADJUST
OPENING
TIME
OF
THE
TENSION
DISCS
(Fig.
35)
The tension discs should be pushed apart to open when
the presser foot is lifted.
But
the open timing
of
the ten-
sion discs can be adjusted
as
follows: Remove face plate
and the rubber plug
at
rear side
of
arm and loosen screw
(A) ofthe knee lifting lever (left), then the tension relea-
sing cam can be moved leftward
or
rightward when the
camis moved right-ward. it is later to open, otherwise it
is earlier
to
open.
\,,,
..
.......
i
\
----
1
.
I ,
_,,.
-
..
____
J.,..-·
28.
I
Adjusting
the
tension
releasing
mechanism
(Fig
.
36)
During the sewing,
the
center
gauge
(L) between the
walking foot sliding block and its shaft can be adjusted
according to the differences
of
the friction coefficients
of
the
friction
coefficients
of
materials
and
the
sewing
process.
Method: Increase L---the upper feed amount
enlarged
reduce L---
the
upper feed amount
shorten
For special sewing requirements, for example, the upper
layer
of
material needs more amount than the lower layer
does, inthis case, adjustment can be done in the range
of
above theory for operation.
-19-
35
36
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Adjusting
presser
foot
alternate
lift
mechanism
(Fig37)
37
During the sewing, the alternate lift amount can be adjusted accoding to the nature
of
material. In general sewing, the
amount
of
walking foot is 5.5mm, and the presser foot lift amount is 3.5mm.
Method: loosen the screw A. turn presser foot front crank up ward to increase the amount
of
walking foot, turn
it
downward
to
reduce the presser foot amount, the range
of
adjusting amount is not too
Adjusting
the
lift
amount
of
presser
foot
together
with
walking
foot
(Fig
38)
The
lift
amount
of
walking presser foot together with
presser foot can also be adjusted slightly.When adjusting,
loosen screw (A) adjust its center distance B between
the
screw
(A) and
the
presser foot
lift
shaft.
The
lift
amount is increased as
to
shorten the ceter distance B, .
and the lift amount is decrea_sed
as
to widen the center
diatance B. After adjustment, tighten the nut again.
-20-
38
co
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