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
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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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15) Needle barstop position (left & right) (Fig.19):
A Stop the motion of left-side needle bar:
Make the stopper wrench to theposition L
B Stop the motion
of right-sideneedle bar:
Make the stopperwrenchto the position R
C Two needles running
at the same time:
Return the needle
bar of left orrightfrom standstill to
running: Press down restore plate, stopper
wr ench
restore to O position automatically
16) Walking foot and presserfoot vertical stroke
adjustment (Fig.23):
Whenfabric with large elasticity is sewn, orwhen thickness of
fabric changes, the vertical stroke (movable range) of the
presserfeet should
be adjusted as follows:
A Loosen the special bolt;
B The vertical strokes
of presser feet become minimum
when the crank rod is moved downward and set;
·· · C ' The vertical strokes
of presser feet become m1mmum
when the crankrod is moved upward and set;
D After the adjustment, tighten the special nut.
Special boll Crank
Crankrod
Thevertical strokes of presser feet canbe adjusted within a range from 2mm to 6mm.
, ,
17) Relationship between rotating hook motion and take-up lever motion (Fig.24)
Fig.22
When the timingbelt (toothed belt) was removed for its replacement, for example, the relationship between·
rotating hook motion and take-up lever motion should
be
adjusted as follows:
A Turn the balance wheel and stop when the take-up lever is
lifted to its upper dead point.
B Lean
the machine head backward and make sure the arrow
(timing mark)
put on the timing beltis in line with the black
line
on the boss of l9wer shaft bearing.
C If
the timing mark is not in line with the black line, remove
the timing belt and install it again to adjust.
Black line on boss
of lower shaft bearing
Timing belt sprocker
18) Relationship between hook motion and opener motion (Fig.25)
Tlmlng mark
Fig . 24
A Tum the balance wheel by hand and stop when the opener hoider is located most remotely fro·m the
- 7 -
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throatplate.
B Makesure gap between the bobbin case hold
er
A and
the open
er
is approximately 0.2mm.
C
If
the gap
is
too large
or
small, loosen the opener holder
set screw B and adjustposition
of
theopener.
19) Relationship between n
ee
dle motion and feed d
og
motion
Approx
O2mm
Opener
B
Opener
holder
A Set feed length to "O"
on
the feed setting dial
B Lean the machine head backward. (Fig.26)
C
D
Loosen the feed lifting rockshaft crank setscrews A and B
Set t
he
needle
at
the lowest position. Adjust the distance
between presser
rod
and vibration prevention rod to 9mm
, and temporarily tighten the feed lifting rockshaft crank
se
t
· screws A and
B.(
Fig.27)
E Check that the
ri
ght
feed lifting rockshaft crank is
connected with the link
at
right angle, as shown
in
Figure.
F
If
the connecti
on
is not
at
right angle, remove the back
cover, loosen screw C and move the right link to connect
B
the right feed lifting r
oc
k
shaf
t with the li
nk
at
right angle.(Fig.28)
Feed
l
ifting
rock
shaft
crank
(middle)
G After the completion
of
adjustment,
fu
ll
y tighten the screws
A,
B and C.
Feed
llfllng
rock
shaft
crank
(right)
Fig.25
•
At
this ti
me
makecenain thatneed
le
canenter the feed dog needle hole
at
thecenter
of
the ~ole.
Needle
rod
Vibra
tion
preven
Uo
n
ro
d
Fig.
27
20) Safety clutch device (Fig.
21
, Fig.22) :
Feed
l
ifting
rock
shaft
crank
(right)
Safety clutch device
is
installed
to
prevent
the
hook
and
cog
be
lt
fro
m
damage
in case the
-8
-
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thread is caught into the hook when the machine is loaded abnormally operation.
A Function of safe~y clutch:
a. When the safety clutch acts, the cog belt pulley will be
unloaded. Th ~n the rotation of hook shaftwill stop. Th e
arm shaft only will rotate. Stop the operation of
machine.
b. Clean the thread thoroughly which is caug ht into the
hook.
c. Tum the cog belt hub by hand, and check whether the
Push
bullon
hook shaftrotat es lightly and properly, place the clutch device as follows.
B How to set thesafety clutch (Fig.29)
a. While pressing down the push button on the
White marl<
Ec:cenlricPin
rmng e,tt
opposite side of bed by left hand, tum th e bal ance
wheel slowly by righthand awayfrom you;
St11nglh1n St! Seraw
Fig.29
.
b. The bal an ce wheel will stop by the gear plate, but
tum the balancewheel more finnly;
.. _ r.
c. Release the push button, the safety clutch device
low Shaft Eccentric Pin
is set.
' C 'Force applied to the safetyclutch (Fig.30)
Fig . 30
a. The force applied to the safety clutch is the smallest when the mark of eci;.entric pin faces the
center of the lowershaft. The force proportionally increases as the mark faces theoutside;
b. To adjust the force slide the timing belt, loos en the set screw, and tum the eccentric pin;
c. After the adjustment, tighten the se t screw.
21) Adjustment
Screwing the pin thatconnects the link of back-s ew ing with the crank of back-sewing (down) can adjust the
tolerance of between the stitches.
Screwing the pin in clockwise
can increase the stitch of
forward sewing; otherwise, the
stitch of back-sewing will be
increased.
22 ) Installation of mo vab le
knife
Bol A
Throad trimmor
1ocl<lng c,ank
Thread trimrrer
rocking c1ank
- 9-
Fig.31
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A Installation of movable.knife (Fig.31)
a. Turn the balance wheel and lower the needle bar to the
lowe st position. ·
b. Push the cam follower crank so that the .cam roller enters
into the thread trimmer cam groove.
c. Tum the balance wheel until the black mark point on the
arm meets the white mark point on the balance wheel. Set
the cam follower crank at this position with a screwdriver
temporarily preventing the cam roller coming out from the
camgroove.
d. Loosenthe thread trimmer rocking crank clamp bolts A and B.
Monable
Knife
Approx0.2 Fig.32
e. Adjust the movable .knife sothat the movable knife end slantportion protrudes 0-0.5 mmfrom the
fixed .knife, as shown in Figure and tighten the bolts A and B.
B Gap betweenmovable knife and bobbincaseholder stopper (Fig.32)
a. Turn the balance wheel by hand until needle reaches the Lowest position.
b. With the needle at the lowest position, depress cam follower crank, turn the balance wheel until
the movableknife reaches the extremity of its stroke.
c. Manually rotate the inner hook in the direction indicated by arrow in Figure and adjust gap
between the movable knife and the inner hook stopper to about 0.5 mm (the screws A and B
should be loosened for this adjustment).
23)Adjustment of thread trimmer cam
A Turn the balance wheel by hand until the hccdlcs reach the lowest position.
B Maintaining the needle position, depress the cam follower crank and putthe cam roller into the groove
of thread trimmer cam.
C Turning the balance wheel by hand, adjust the thread trimmer cam so that the movable knife starts
moving when the green mark point on the balance wheel comes in line with the black mark point on
the ann.
Thread trimmer cam
10 -
Gr ee n ma rk 1x 1int
Blac:krn ark
point
Fig.33
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Note: To adjust, Loosen two threadtrimmer cam clamp screws A.
24)Adjustment of needle threa~s tension release assembly (Fig.34)
A Turn the balance wheel byhand until the needles reach the lowest position.
B Maintaining the needle position, depress the cam follower crank and put the cam roller into the groove
of
thread trimmer cam.
C Turning the balance wheel byhand, adjust the thread tension release cam so that the·tension disc close
when the white mark point· on the balance whe el comes in line with theblack mark point on th e arm.
D To adjust, loosen two tension release cam clamp screws A.
E Opening degree of tension disc should be adjusted with the tension release roller B mounted on the
convex portion
of thread release cam, as shown in Fig. To ·adjust, loosen the screws C and draw the
wrre.
F Make fine adjustment by loosening the nut D.
G Loosen the nut D and make the outer casing approach rightward to increase the opening value.
Thread
rele~e c11m
I
Thread trimmer
cam ScrewC
Whae park point
Nut D
25)Adjustment of scissoring pressure of movable knife and fixed knife (Fig.35)
A Loosen the fixed knife bracket clamp bolt A.
Fig.34
B Tum the vertical position adjusting screw B to adjust meshing pressure and then righter the hexagon
socket head cap screw A.
Note: Since excess pressure causes large torque to the thread
trimming mechanism and
trimmin g failure, adjust itso
that thread can be trimmed with
minimum pressure.
C Move the movable kni fe and check that th e thread can be
sharply trimmed.
- 11 -
Fixed kntte
rader
Screw A
Fig.35
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26) Sharpening of fixed knife
When theknives dull, the.fixed should be sharpened as illustrated in Fig. Since it is very difficult to sharpen
the movable knife, replace it with a new
OM when it dulls (Fig.36).
27)Adjustment for change of needle-to-needle distance (Fig.37)
A Replace the throat plate, feed dog and needle clamp. (Since the
throat plate and feed dog are special parts designed for thread
trimming machine, be sure to use those specified byus.)
B Leanthemachine head backward.
C Loosen two connecting link clamp bolts J.
D Remove the spring M.
E Loosen the hook bracket clamp screws A and B and adjust gap
between each needle
and hook.
F When the needles and hooks have
been adjusted, install the spring M.
G Contact the rocking cranks C and D
to the stopper pins E and F and
tighten the connecting link clamp
bolt
J.
H Turn thebalance wheel by band until
the needles reach the lowest
position.
I Loosen the nuts G and H.
CnnnP.r.liOU
link
Hook brac k '3 1
(latt)
Cam groove ,{J_~h ase
Screw A
Screws
Fig.36
Fig.37
J Depress the cam follower crank K and adjust the connecting rod L so thatthe cam roller can smoothly
enter
the groove of thread trimmer cam.
Adjustment of the cam groove and the cam roller
A Pushthe cam follower crank K so that the cam roller enters into the cam groove.
B Tum the connecting rod Land adjust the clearance between the cam roller and the cam groove surface
Las small as possible, and tighten the nuts G and H.
C Push the cam follower crank K again and check that the
cam roller enters into the thread trimmer cam
groove
smoothly.
- 12 -
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WF 926- SNB
WF 926 -SNB I AUT
COMPOUND-FEED LOCKSTITCH INDUSTRIAL SEWING
MACHINE WITH SPLIT NEEDLE BAR
SP ARE PARTS LIST
Global International BV
H. Figeeweg 4
2031 BJ Haarlem
tel: [phone]
fax: [phone]
e-mail: [email protected]
Global Parts bv
H. Figeeweg
48
2031 BJ Haarlem
tel: [phone]
fax: [phone]
e-mail: [email protected]
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

A.A RM BED MEC H AN I SM
2 3 4 (2) 5 6 8 9
10
11
40 39 38 37 36 35 (33) 34 33 32 31 30 29 15 14 13 12
-13 -
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

A.ARM BED MECHANISM
co
z
Fig.
VJ
!--
Part No.
Description I SO;:>
No.
\Q
~<
Rema rks
M '
--
~
~i:i:i
la,
3z
3
r,i
AO}
HA300B2090 Rubber plug
2 2
A02 HA300B2170 Screw
15 15 SMll/64 (40) x9
A03 H4716B8001 Oil guide plate 1 1
A04 H4717B8001 Thread take-up cover 1 1
A05 H4715B8001
Rubber plug 1 1
A06 H 47 18B8001 Arm side cover (left) 1 1
A07 H2000B2010 Rubber
plug 1 1
A08 H4719B8001
Arm side cover(right) 1 1
A08 H
49 19B8001 Side
cover (right) 1 1
A09 HA700B2060 Screw 2 2
SMll/64 (40) x8
Al0 H2400B2100 1br ead guide 1 1
All
HA307B0673 Rubber plug 1 1
Al2 H4715H8001
Pus h button 1 1
Al3 H4714H8001 Spring 1 1
A14 H007013050 E-type r
in g I I
Al5 H2000M0090
Cap
2 2
Al6 H3200B2100
Sc r ew
1 1 SM9/64
(40) x6.5
Al7 H3212B0
066
1bread _guide 1 1
Al8 H3000D2160 Screw 1 1 SM9/64
(40) X4.5
Al9 H4726B8001
1bread guide 1 1
A20 H0213B8001
Fac e plate 1 1
A2 1 H2400B2080 Screw 2 2
SM3/l 6 (28) xl2.l
A22 H2 400B2070
1brea d gui d~
1 I
A23 H0212B8001 Shaft supporter I I
A24 H2 400B2060 Spacer I 1
A25 H3200B2060 Oil guide plate I I
A26 HA7311C606 Screw 2 2
SM 11/64(40)xI5
A2 7 8602030200
Pin 2 2 A
A28 HA100B21
IO
Screw 2 2
SMl l/64(40)x5.5
A29 H3219B0067 Slide plate complete I
A30 H3200B2170 Screw I SM13/64
(32) x4 .8
A31 H49 12B8001 Screw 2
SMl/4 (24) x9
A
32 H 49 13B8001 Supporter 1
A3 3 H4914B80 01
Scr ew
4 SM9/64
(40) x6
A3 4 H49 15 B8001 Cover 1
A35 H4911B8001 Cover 1 1
A36 H4733B8001 Slide plate(right) 1 1
A37 HA300B2190 Screw 1 1 SMI J/64 (
40) x8
A38 H4740B8001 Needle plate 1
A38 H4741B8001 Needle plate I
A38 I-14940B8001 Needle plate I
A38 H4941B8001 Needle plate I
A39 H3200B2120 Screw l I SM9/64
(36) x6 .5
-14-
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A.ARM BED MECHANISM
2 3 4 (2) 5 6 8 9
10
25
11
40 39 38 37 36 35 (~3) 34 33 32 31 30 29
15 14 13 12
-13 -
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com