Global WF 926-SNB Parts list manual

GLOBAL
WF
926-SNB
{-AUT)
Instruction & Parts Manual
www
.globalsew.com
[email protected]

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

--
-CONTENTS -
--
Ins
truc
tio
n
Ma
nu
al
1,
PREPARA
T
IO
N FOR
OPERA
T
IO
N
..........
.. . .
...
..
....
..
.
...
.
...................
.
....
1
1)
La
ntplea
ds
...
.
.......
..
....................
..
........
..
............................
. . 1
2) Connection
of
control box
...............
.
......
.
......
.
..
.
...............
...
...
.
........
1
3) Adjustment
of
needle
bar
stopposition
.....................................................
2
2. CAU
TIO
NS
ON
US
E
..........
.
................
..
...
..
.......
.
........
.. .
.......
.
.....
.
2
1) Lubrication
(I)
................................................
.
......
.
........
.
.......
2
2) Lubrication(2) ...
.....
.
.........
. . .
.........................................
. . . . .
.....
2
3) Adjustment
of
oili
ng
to
ro
tating hook
.....
. . .
..............................................
2
4) Condition
of
oil lubrication
..
.
...
.
..
.
...
. .
..
.
....
.......
...
...
..
....
..
...
. .
..
. . . . . . . . .
..
. 3
5) Cautions on operation
..........................
.
..
.
.....................................
3
3. OP
ERATIO
N
..
.
......
.
...........
.
..........
..
.....
..
.....
..
....
....
.. .
..
.. .
.......
..
3
1) H
ow
to attach needle
..........
.
.............................
.
......
..
...............
. . . 3
2) H
ow
to wind the lower thread
..
...
...
...
.....
..
. .
......
. . .
...
..
.
....
. . .
...
....
...
. .
..
..
. 3
3) Selection
of
Thread
.....................
.
....................
...
......
.
......
.
.........
3
4) How to route the upper thread
............
.
......
. .
...
..
.
......
....
......
. .
....
...
.
..
. . . . . 4
5) Adjustment
of
s
ti
tch length and reverse sewing
..
.
............................................
4
6)
Se
ttingbobbin
...
...
...
...
..........
...
.... ..
..
.....
..
.
....
.
..
...
. .
...
...
.......
. .
..
. . 4
7)
Thre
ading
of
bobbin t
hr
ead
.............................
.
................
.
..
·
....
,
........
5
8) Tension adjustment
ofbobbin
threads
......
. .
......
. . .
.....
..
.....
...
.
..
.
......
.
......
. . . . . 5
9) Balance of t
hr
ead tension
........
.
.......
.
...............................................
5
10)
Ne
edle thr
ea
d tension . .
..
......
....
..
..
......
.
..
.
..
.
...
.
....
.
..
. .
...
........
....
.
...
. . . 5
11) Adjustm
ent
of
pr
ess
ur
e of
pr
esser foot
..
. . .
.............
.
..........
.
......................
5
12) Timingbetween rotating hook motion and needle motion .
...
. .
...
. . . .
..
.
..
..
. . . .
....
.
..
. . . .
..
. 6
13) Adjustment
of
Fe
ed
dog height
....
.
...
.
..........
.
.....
..
..............
.
........
.
......
. 6
14) Adj
us
tm
ent
the nee
dl
e stop position
......
. .
....
..
...
.....
. .
....
..
...
..
. . . . . .
..
. . . . .
..
...
..
6
15) Needle
bar
stop position (left &right)
..............
.
..............
..
......
.
.......
..
.......
7
16) Walking foot and
pr
esser
fo
ot
vertical stroke adjustment
..
.
.........
. .
...
..
.
....
.
.......
.
..
. .
..
7
17) Relationship between rotating hook motion and take-up lever mo
ti
on
.....................
.
......
7
18)
Re
lationship be
tw
een hook motion and opener motion
......
..
.
........
. .
...
.....
..
. . .
........
. 7
19) Relationship between needle motion and feed dog motion
..............................
.
.....
; . 8
20) Safe clutch devi
ce
.....
..
..
. .
....
...
. .
......
..
. .
..
. .
..
.
.....
..
. .
.........
.
...
.
..
..
. . . . 8
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

21) Adjustment ............................................................ . ............. 9
22) Installation of movable knife ......... . .................................................. 9
23) Adjustment
of thread trimmer cam ............................................... : ...... IO
24) Adjustment of threads tension release assembly ......................................... · ,- .. : 11 ·
25) Adjustment of scissoringpressure of movable knife and fixed knife .......................... · .. 11
26) Sharpening of fixed knife ........ ...... .............. ... .............. . ..... . . .. . ...... 12
27) Adjustment for change of needle-to-needle distance ......................................... 12
Parts Catalog
A, ARM BED MECHANISM ............ . ......... ....... ...... ............... ........... 13
B, THREAD TENSION REGULATOR MECHANISM . ........ . ............................... 16
C ARM SHAFT*LOWER SHAFT MECHANISM ............... .... .. . ... .. ................. 20
D, PRESSER FOOTMECHANISM ...... .... ..... . .................. . ............... .. • ...... 22
E, NEEDLE BAR & TAKE-UP LEVER MECHANISM ....... . ......... .. ...... . ... ........ ... 25
F, TOP FEED ROCK SHAFT MECHANISM .......................... . ..................... 28
G, LOWER SHAFT&FEED ROCK SHAFT MECHANISM ......... . .......................... ~O
H, HOOK SADDLE MECHANISM ............................. . ... .' ...................... 33
. I, KNIFT MECHANISM ( 1) ....... . .. . .......... . ..... .. .... :· .......... .. .... . ..... ...... . 35
J, KNIFT MECHANISM (2) ... .............. ......... ...... . ..... ...... ... ...... .... . ... 37
K, TOUCH BACK AND DETECTOR MECHANISM .................................... . ..... 49
L, OIL LUBRICATION MECHANISM ............................ ,. ....... . ................ 42
J, ACCESSORIES .................... . ........ .... .......... .................. . . ....... 45
2
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1.
PREPARATION
FOR
OPERATION
1)
La
mp Leads
A.
When
installing the illuminating lamp
(6V,
15-20W),
The
connecti
ng wire
is
attached
on
the back
of
the
Control
b
ox.
It should be r
emoved
and
connected by
removing
the insulating
tube
from
the
wire
a
nd
stripping
properly.
The wire connections should
be,'
then, in
su
l
ated
by
wrapping
in
su
l
ating
tape
on
the
wires.
CAUTION:
The power switch must beturned offbefore connecting the lamp.
B.
When
the illwninating
lamp
is not used,
(b)
lnsLJating
tape
(a)
Bar
e
Wire
(2
to
3
turn
s
wrapped
)
the
end
of
the
lamp
l
eads
must be
ins
ul
ated
as
(a ) or (b)
as
shown
in
the
figure
on rightsid
e.
Ifa short circuit
occurs
failing
to
insulate,
the
transformer
in the control box will
be
possibly
burned
out.
L
amp
reads
lns~
aHng
tape
(2
to
3
turns
Ynpped)
L
amp
leads
CAUTION:
The
illuminating lamp mu
st
not be connected with any heater, such as a foot
wa
rmer
and
others, in
par
allel. Otherwise, the load capacity will be exceeded.
It
may cause
transformer winding
burned
out.
C.
,Rotary direction
It
is
po
ssible
to
change the rotary direction
of
the motor
by
removing
the rubber cap
from
the
bottom
left side
of
the front cover on
the
control box;
an
d
pu
sh the internal
dire
ction selector
switch.
The
built-in
lamp
in the internal switch,
is
off
when
the motor
is
rotating counterclockwise
as
facing
to
the motor
pulley,
and
on
when rotating clockwise. The rotary directi
on
has
been
set
to
counterclockwise
as
facing
to
the motor
pulley,
matc
hing
with
th
e
machin
e prior
to
shippin
g.
2)
Connection
of
control box(Fig.1)
The control box
should
be
connected
as
shown
to
the
righ
t.
Note:
A.
Be sure
to
tum the
power
switch off
for
safety
before
connecting or
disconnecting
the
connectors.
B.
The
comb
ination
of
t
he
machine
heads
with
the
moto
r
contro
l
panels are
spec
ified
below
.
Use
special care
for
the
correct
combination when r
ep
lacing
the
machine
head
or
motor
control
panel.
- I -
Round
hole
In
table
Wh
i
te
mark UP pos
lUo
n
Blackmark
DOWN
position
1
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3) Adjustment of needle bar stop position(Fig.2,Fig.3)
A. Adjust of "UP" position: When the pedal is kicked down by heel, the machine stops at "UP" position.
Ifthe marks deviate larger than 3 mm, adjust as follows.
a. Disconnect the plug (12 pins)
of cable from the
machinehead.
b. Run the machine and stop
at "UP" position.
c. While holding the pulley, insert the "adjusting
tool"
in the hole "A", then remove the tool.
B. Adjust of "Down" position: When thepedal is
''Neutral"the
ma chine stops at "Down" position. If
the marks deviate large than 5 mm , adjust as follows.
®
a. Disconnect theplug (12 pins) of cable from the machine head.
b. Runthemachine and stop
at "Down" position.
c. While holding thepulley, insert the "adjusting too
l" in the hole "B ", then remove the tool.
C. Confinnthe stop operation, then set the plug (12 pings) coming from the machine head into the
receptacle.
2.CAUTIONS ON USE
-1) Lubrication (l)(Fi g. 4)
Pour oil up to position "H" of the oil tank.
During operation, check the oil level periodically, and in cases
where the oil level is belowposition
"L", ~eplenish the oil
supply up toposition
"H".
Use white spindle oil.
2) Lubrication (2)(Fig.5)
Oil
3
When a new sewing machine is used for the first time, or sewing machine left out of use for a long time is
used again, replenish a su itable amount of oil to theportions indicated by arrow in the fig.
Note: Lubricate theHookBase everyday.
3)Adjustment of
oiling to rotating
hook( Fig.6)
-2-
~ase
Iner
·usting Screw
Nut
6
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4) Condition
of
oil lubrication (Fig.5):
While operating the machine, check the condition
of
o
il
lubrication
throug
hthe oil
check
window.
5) Cautions on oper:ation
A Whenthe power
is
tumed on or off, keep
foot
aw
ay
from
th
e
pedal.
B It
shou
ld
be
noted that the brake
may
not
work
when the power is interrupted or power failure
occ
urs
duri
ng
sewi
ngmachine operation.
C Since dust in the control box might cause malfunction or control troubles, be sure
to
keep
the control
box
cover close during operation.
D
Do
not apply a multimeter to the control circuit for checking;
otherw
ise voltage
of
multimeter might
damage
sem
iconductor co
mpon
ents
in
thecircuit.
3.0PERATION
1) How to attach needle (Fig.7):
Note:Before attach needle,
be
sure
to
turn
offthe power.
Loosen the needle cla
mp
ing screw;Hold the needles so that t
he
two
needles
side with the long grooved (faces each other),
and
insertit
as
deeply
as
itwill go into the needle cl
amping
holes,
.,tighten
screws.
2)
_How to wind
the
lowerthread (Fig.8):
. Strength
of
winding: Particularly in the case
of
nyl
on
or
··
p
olyeste
r thread, wind the bobbin
lo
osely.
c:::::
Uneven
wind
in
g:
If
the bobbin is wound
un
e
venly,
slide the thread guide toward
the
less
wound
portion
of
bobbin.
Winding
amount:
When the bobbin is
wound
excessively, loosen the adjusting screw.When the bobbin is
wound
insuffi
ciently, tighten the adjusting
screw.
3)
Selection
of
Thread (Fig.9):
Wnding ten,
io
n
~
adjus
ll
ng
ac
rew
"-
0
~
-
I
Even
wi
ndi
ng
wtth
an
amount
415
of
July
capa
cly
Fig.8
Fig.9
- · 3 -
~
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Itis recommended to use "S" twistthread in the leftneedle (Viewed from front), and "Z"twist thread inthe
right
needle.
Whendiscriminate use of~eedle thread is impossible, use "Z" twist thread in the needle. For bobbin thread,
"S" twistthread as well as "Z"twist thread cau be used .
4) How to route the upper thread (Fig. to, Fig.11):
A Pass each upper thread through thread guide A
Note: when thin slippery thread (polyester t hread for example) is used pass the thread through.
thread
guide B as show in Fig.10
B Withthe take-up lever located at the upper most position, pass each thread in the orderin Fig.11.
Note: Pressing the upper thread kJsening button, the upper thread can be pulled out easily.
Needle thread
tension releasing button
Lead the , Lead the
thread thread
lertword rtghtward
Fig. IO Fig.11
5)Adjustment of stitch length and reverse sewing (Fig. 12):
A Rotate the stitch length adjusting dial to change the stitch length
B Pressing the stitch length adjusting leverfor reverse stitching.
6) Setting bobbin (Fig.13):
lllnl
k
~fleed reverse
lever
Fig.12
-4-
Fig.13
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Leading the lower thread and install thebobbin
Pull out thread from side A , then install the bobbin case , Threading following
CD-@; Put the boobin case
to rotating hook, thenreplace hook shaft; Press the bobbin bar, leading the lower thread over bedplate.
7) Threading of bobbin threads (Fig.14)
While ho lding the two needle Threads by left hand, rotate the hand-wheel one tum· by right hand. By
pulling up the needle threads, as shown in the figure, the bobbin threads will be lifted. Each combination of
bobbin thread and needle thread should be aligned
and led backward.
8) Tension adjustment of bobbin threads (Fig.15)
9)'Balance of thread tension (Fig.16)
l0) Needle thread tension (Fig.17)
Needle thread tension should be adjusted in reference to
bobbin thr(;lad tension. To adjust needle thread tension, tum
eachtension adjusting
nut. Needle thread tension can be
also adjusted for special fabric and thread by changing
intensi
ty and movable range of slack thread adjusting spring.
✓ ~- --1
Thread tension F'
17
adjusting nut ,g.
11 ) Adjustment of pressure of presser foot (Fig.18):
Tension
adjusting
screw
AQ?'.77£3-~
· Balance tension
BX ~IJai?
?::....;;="'--..., :h't neede or loose
bobbin lension
C X ,< ~ -,~-----l
bobbin tension Fig. l6
A Pressure should be adjusted according to the material to be sewn.
- 5 -
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B
Turning
th
epressure adjusting
screw
to
adj
ust
the
pressure ofpresser
foot
12) Timing between rotating hook motion and n
ee
dle motion (Fig.19):
A Setstitch l
en
gthto
"6";
B
When
needle
is lifted 2.4mm
from
the lower dead point,
the
fo
ll
owi
ng
position relati
ons
hip
should
be
maintained:
Gap
between
hook
point and
upper
edge
of
n
eedle
eye
a.
The
upp
er
edge
of
needle eye
should
be
2.3mm
below
the
hook
point
L:_~
~
'"
'"'"
~
cfr:)
2.
-4nrn
f
rom
~•
b. . The
hook
point should be located
at
the
center
of
n
eed
le
axis.
c.
Gap
between the ho
ok
point
and
th
e side face
of
n
eed
le sho
uld
be 0.05
mm
13)Adjustment
of
Feed dog heig
ht
(F
ig.2
0)
:
Height
of
fee
d
dog
sho
uld
be adjusted
for
i
ndividual
fabrics
with
the
following
caut
io
ns:
nudl
,
lower
dtad
point
c,nltr
of
nudl,
ult
A Fabric will
be
damaged
if the
feed
do
g
ex
tend
s
too
high or pressure
of
pres
ser
foo
t is
too
large
B
Even stitch length cannot be assured
if
the
feed
dog
is too
low
or
pressure
of
presser foot
is
t
oo
sma
ll
C
Feed
dog
height should be measured at
the
point where
the
needle
is at
the
top
po
siti
on.
~
0.6mm
?ii
n
For lightfabric: Approx
0.8mm
For
us
ual
fabric:
Approx
1.
0mm
'
Fo
r heavy fabri
c:
Approx
1.2mm
Adjustment procedure:
A
Lay
down
the machine bed toward
the
othersi
de;
~ 1.
0mm
• ~ 1.
2mm
Z71
I
Fig
.2
0
B
Turn
the balance wheel by hand stop
when
the
feed
dog
is raise
to
it
s h
ig
hest
position
from
t
he
surface
of
need
le place;
C
Loosen
the
Screw
and
adju
st
the
height
of
th
e f
eed
dog;
D
After adjusted, tighten the
screw.
The
feed dog height is factory
-a
djusted
to
1.2mm
14)Adjustment the needle stop position (
21
):
A
Loosen
the
n
eedle
bar Screw
A;
B
Rotate the
need
le clamp
B
one circuit (amount of Adjustment is
0.6mm),
or loosen the needle bar screw
C,
rotate position scr
ew
D
halfa circuit
(amoun
t
of
Adjustment
is
0.3mm)
Needle
ba
r
s,rew
,
__
~
Needl
e
bar
sc
rew
A__,
Position
screw
o
Needleclamp
a
<:
~
Fig.21
C·
Be
sure to
mak
ethe needle
clamp
facing
left side, tighten
needle
bar
screw
C
and
A
-6-
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