Siruba L381,L382,L383 Instruction Book
L381
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IMPORTANT SAFETY INSTRUCTIONS
To
get the most out
of
the many functions
of
this machine and operate it
in
safety, it is necessary to use this
machine
correctly.
Please
read this Instruction Manual carefully before use. We hope you will enjoy the use
of
your machine
for a long time.
Please remember to keep this manual
in
a safe place.
1.
Observe the basic safety measures, including, but not limited to the following ones, whenever you use the
machine.
2.
Read all the instructions, including, but not limited to this Instruction Manual before you use the
machine,
In
addition, keep this instruction Manual so that you may read it at anytime when necessary.
3.
Use the machine after it has been ascertained that it conforms with safety rules/standards valid
in
your
country.
4.
All safety devices must be
in
position when the machine is redady for work or
in
operation. The operation
without the specified safety devices is not
allowed.
5.
This machine shall be operated by appropriately-trained operators.
6.
For your personal protection, we recommend that you wear safety glasses.
7.
For the following, turn off the power switch of disconnect the power plug of the machine from the receptacie.
7.1
For threading needle (s) and replacing bobbin.
7.2 For
replacing part (s) of needle, presser foot, throat plate, feed dog, cloth gude etc.
7.3 For repair work.
7.4 When
leaving the working place
of
when the working place
is
unattended.
8.
If you should allow oil, grease, etc. used with the machine and devices to come
in
contact with your eyes
or skin or
swallow any of such liquid
by
mistake, immediately wash the contacted areas and consult a
medical doctor.
9.
Tampering with the live parts and devices. regardless
of
whether the machine
is
powered, is prohibited.
1
0.
Repair, remodeling and adjustment works must only
be
done
by
appropriately trained technicians or
specially skilled personnel.
11. General maintenance and inspection works have to be done
by
appropriately trained personel.
12. Repair and maintenance works
of
electrical components shall be conducted
by
qualified electric
technicians or under the audit and guidance of specially skilled personnel.
Whenever you find a failure
of
any of electrical components, immediately stop the machine.
13.
Periodically clean the machine throughout the period of use.
14. Grounding the machine
is
always necessary fot the normal operation of the machine. The machine has
to be operated
in
an envivronment that
is
free from strong noise sources such as high-frequency welder.
15.
An
appropriate power plug has to be attached to the machine
by
electric technicians, Power plug has to
be connected to a grounded
receptacle.
16. The machine
is
only allowed to be used for the purpese intended. Other used are not allowed.
17. Remodel or modify the machine
in
accordance with the safety rules/standards while taking
all
the effective
safety measures. We assumes
no
responsibility for damage caused
by
remodeling or modification
of
the
machine.
18. Warning hints are marked with the two shown
symbols.
A Danger
of
injury to operator
or
service staft
& Items requiring special attention
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FOR SAFE OPERATION
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1.
To
avoid electrical shock hazards, neither open the cover
of
the electrical box for the
motor nor touch the components mounted inside the
electrical box.
1.
To
avoid personal injury, never operate the machine with any of the belt cover, finger
guard
of
safety daevices removed.
2.
To
prevent possible personal injuries caused by being caught
in
the machine. keep
&
your fingers, head and clothes away from the handwheel, V belt and the motor while
the machine
is
operation.
In
addition, place nothing around them.
3.
To
avoid personal injury, never put your hand under the needle when you turn "ON"
the power switch or operate the machine.
4.
To
avoid personal injury, never put your fingers into the thread take-up cover while
the machine
is
in
operation.
5.
The looper rotates at a high speed while the machine
is
in
operation,
To
prevent possible injury to hands, be sure to keep your hands away from the vicinity of the looper
during operation.ln addition, be sure to turn OFF the power to the machine when
replacing the looper.
6.
To
avoid possible personal injuries, be careful not to allow your fingers in the ma-
chine when tiling/raising the machine head.
7.
To
avoid possible accidents because
of
abrupt start
of
the machine, turn OFF the
power to the machine when
tilting the machine head or removing the belt cover and
the V
belt.
8.
If your machine
is
equipped with a servo-motor, the motor does not produce noise
while the machine is at rest.
To
avoid possible accidents due to abrupt start of the
machine,
be
sure to turn OFF the power to the machine.
9.
To
avoid electrical shock hazards, never operate the sewing machine with the ground
wire for the power
supply removed.
10.
To
prevent possible accidents because of electric shock or damaged electrial compo-
nent(s), turn
OFF the power switch in prior to the connectrion/disconnecti
on
of
the
power
plug.
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Contents
Before operation · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
··
1
l.Pre-start checks
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 1
2.0perating
instructions······························································································································· 1
3.Specification
· · · · · · · · ··· · · · · · ·
·· · ··
· · · · · · ·· · · · · · · · · · · ·
··
· · · · · · · · · · · ·· · · ·
··
· · · · · · · · ·
··
· · · · · · ·· · · · · · · · · · · · · · · · ·
··
· · ·
··
· · ·
··
· · ·
·· · ··
· · · · · · · · · · · · · · · · · · · · · ·
··
2
4. Installation
of
the machine · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 2
5.
Oiling····················································································································································· 2
6.
How to regulate oil amount
by
means
of
manipulating elements on the face plate · · · · · · ·
··
· · · · · · · · · · · · · · · ·
··
· · · · · · ·
··
3
7.
The threading
of
needle thread · · · · · · · · · · · · · · · · · ·
..
· · · · · · · · · · · · · · · · · · ·
..
· · · · · · · · · · · · · · · ·
..
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
..
· · · · · · · · · · · · ·
..
· · · · 3
8.
The threading
of
bobbin thread ............................................................................................................... 4
9.
Thread tension asm · · · · · · · · · · · · · · · · · · · · ·
..
· · · · · · · · · · · · · · · · · · ·
..
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
..
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
..
-5
10.
Presser foot ........................................................................................................................................... 5
11.
To adjust stitch length········· ..... ····································· ... ··············· ... ·············· ... ··························· ...
·····
6
12.
Setting-up
of
the needle······································· ·················································································· 6
13.
Adjustment
of
the height
of
the presser bar·········· ...................................................... ................ ..........
..
7
14. Adjustment
of
the height
of
the feed dog···· ............................................................................................ 7
15. The timing
of
feed dog and needJe ......................................................................................................... 7
16.
Adjustment
of
the height
of
needle bar .................................................................................................. 8
17. Adjustment
of
the needle and looper ..................................................................................................... 8
18.
The timing
of
looper in reference to needle ............................................................................................ 9
19.
Thread-guiding amount
of
the loper · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
··
9
20. The clearance
of
looper and needle·········
..
···················
..
················
..
·················
..
·············
..
·············
..
····· 9
21. The timing
of
needle guard · · · · · · · ·
..
· · · ·
..
· · · · · · · · · · · · · ·
.. · ..
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
..
· · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
..
· · · · · ·
··
1 0
22. Position
of
needle guard · · · · · · · · · ·
..
· · · · · · · · · · · · · · · · · · · ·
..
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
..
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
..
· · · · · · · · · · · · ·
10
23. Loper thread take-up cam ...................................................................................................................
10
24. The position
of
thread-amount adjusting plate
of
the thread take-up lever········ ... ··············· ... ···············
11
25. Frame thread eyelet · · · · · · · · · · · · · · · · · · ·
..
· · · · · · · · · · · · · · · · · · ·
..
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
..
· · · · · · · · · · · · · ·
..
· · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
11
26. Replacement
of
throat plate················································································································
11
27. Maintenance
of
the machine · · · · · · · · · .... · ·
..
· · ·
..
· · · · · · · ·
..
· ·
..
· · · · · · · · · · · · · · ·
..
· ·
..
· · · · · · · · · · .... · ·
..
· · · · · · · · · .... · .... · · · · · · ·
..
· · · ·
..
· ··
12
28. Common breakdowns and measures
of
trouble shooting .... ·
..
· · · ........ · ...... · · ·
..
· ........ · · · · · · · · ............ · .... · .....
12
PARTS BOOK ............................................................................... ..........................................................
17
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I Before operation
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CAUTION:
To avoid malfunction and damage
of
the machine, confirm the following:
• Before you put the machine into operation for the first time after the set-up, clean it thoroughly. Remove all dust
gathering during transportation and oil it well.
• Confirm that the voltage has been correctly set. Confirm that the power plug has been properly connected to the
power supply.
• Never use the machine in the sate where the voltage type
is
irrerent from the designated one.
• Confirm that the direction
of
rotation
of
the motor pulley is correct.
• Operate your machine at the normal sewing speed
or
less for the first month after the set-up.
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I Pre-start Checks
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I. The machine shall not be started running until the completion
of
oiling.
2.
The rotating direction
of
the balance wheel, when the machine is started running, shall be in counter-clockwise one.
(View from the right side
of
the balance wheel.) A warning shall be given in advance against making the machine run
while balance wheel turning clockwise.
3.
The machine shall be under operation at less than
4,000
S.P.M. for the first month.
4. Check power source, voltage, and phase number to see whether they are in accordance with the ratings on the name
plate
of
the motor to be used.
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I Operating instructions
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1.
Do not put your hands under the lower part
of
the needle when the machine
is
running.
2.
Do not put your fingers into the thread take-up lever cover when the machine is running.
3.
Only when the machine stops can you turn the balance wheel by hand.
4. After the motor switch being turned off, due to inertia, the motor will continue to rotate for a while. Be careful not to
have the machine tilted unless
is
stops.
5.
Keep away from the balance wheel, V-belt, winder and the motor.
6.
Do not start running the machine during mounting
or
replacing the belt cover, finger guard, etc.
-1-
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I Specification
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ft
~
tU!J:\~
j!
)1£
it
;@1
~7tfl!l4500~
ft~*ll
1.4-4mm
ftfffi~
30mm
~~Jnl~emoo
118"
5/32"
3116"
7/32"
1/4"
5/16"
3/8"
112"
~t~%:1:\:
ff·ttm~
~
tt
~!ll:U:
iJWiJP:J$1
/8"-1
12"
:®
JfJ
f*tt~
fi
~n:t
,
I!'!!
IE
A:
:Jt
m
~f!ffi.Jlt41
l:;Ff-!1
8-lOmm
f~
idJ
Jlf-Jl~
ifijm-idJ
2%87lb
Stitch
type
Speed
Stitch
length
Stroke
of
needle
bar
Gauges
of
double-row
Thread
take-up
type
Looper
Needle
guard
Light
clearance
of
knee
lifter
Oil
supply
Lubricating
oil
Two-needle double-row chain stitch
Max.4,500 s.p.m.
1.4-4mm
30mm
118"
5/32"
3116"
7/32"
114"
5116"
3/8"
112"
Needle bar thread take
up
type
Separately
adjutable
type,
for
the
range
of
1/8"
to
112"
Oscillating type
and
rigid type
8-lOmm
Impeller-type pump
#2
while oil
1!9,
tlilf.J~it(~Ifl)
I Installation
of
the machine (Fig.l)
001
Fig.l
i!i!lfliJ
Nearbodyside
3
t~titlliJ
Hinge side
1,
Mfla9~~ = :lffil!lflx~CDfJlil!lfl~Q)~ai:it&~=ILa~[Q
1ff,
m
il!Jfl~tr
Q):lff:1tl!!!lli:,
N~l:il!lflo
(
00
1)
2,•m~~-~~A•t&n~.
~ilti~m~~-~~m•
~.
N:lffm~~~[QRJffa9•~m
l:
o
1.
To
install the oil reservoir.
Put
the
oil
reservoir
rubber
cushion
CD
and
oil
reservoir
felt
cushion
Q)on
four
corners
of
the
opening
of
the
table,
fix
them
with
the
wood
screws(bl,then install
the
oil
reservoir
(Figl)
2.
Put
the
machine
connecting
hooks
into
the
holes
to
engage
respe-
ctively
two
hinges
seated
in
the
table,then
place
the
machine
on
the
four
cushions
.
Ji,
1Jnilb(002,
003) I Oiling (Fig.2, Fig.3)
002
Fig.2
003
Fig.3
--
1,
~
ilbf!~1.Jil~~JJfJLil!J(2%13
il!J)~HIGHi2%$ftr(002)o
2,
~ll*il!IIIiH~-=fLOWi2%,
E!ZN1.Jilil!lo
3,
1.JnilbJ§7fl;IJm~,
~Efiff
lE-m-at,
E!Z~fU
ilb~IIJ1t¥UilbTM
1:(003)0
~-r•~MsJ:~M•~~~~MAa9~~~~.m~~
4,
~-~Mil!f,
R~fi~ilba~milll•n.
~ilbanmllio
s,~m~m~~*AA*~ma9Rwm~.
•ffigffi•~•*
ilft3500~4000
-
fi-
a9
j!J.t
~~~'.)
lO*ilfl o
1.
Oiling shaH
be
made in oil reservoir and the oil surface also
be
made
to level the mark
"High" before the machine is started running (Fig.2)
2.
Oiling
shall
be
kept
on until the oil surface has been
brought
above
the mark"Low" (Fig.3)
3.
The
normal condition
of
lubrication is that the oil shall spray onto the
oil sight.
The
amount
of
oil
spraying
onto
the
oil
sight
is not
at
all
proportional
to
the
total
amount
of
oil in
the
oil reservoir.
There
is
nothing to worry about.
4.
Only
when
the drain
cover
screw is loosened
and
taken
off
can
old
oil be drained
out
and new oil is supplied again.
5. When a new model
or
those standing idle for long time is to be ope-
rated,presser foot shall be lifted and run idle for about ten minutes.
-2-
1
\
~
itliif!Sillti:ifnJ-:tp(004)
I
How
to
regulate
oil
amount
by
means
of
manipulating
elements
on
the
face
plate
(Fig.4)
flll{i!:~f'j~
Oil adjusting pin
004
Fig.4
~J.P..
Graduated mark
~
~
~~M·~~~.
~~~~~ff~ff~~~M·~~~~
~J.~,
8ili:~ff~ff~ff.t,
M•MuJ',
&z,
JJllJilb•Mi:k(l!l4)
~~:~~ilb·flit~T*~~.~M·#~~~~~~~
~{t~o
To
turn oil-amount adjusting pin to regulate oil amount
of
the
thread take-up crank,min.oil
amount
will be supplied when the
mark
of
adjusting pin moves to the thread take-up crank as near as
you desire. Otherwise, max.oil amount will be supplied.
-B
~
mi~if.J~¥!(005)
I
The
threading
of
needle
thread.
(Fig.S)
~~ff~*~Mi~QWff.t.~005M~M@*~~M3RRo
1.
RM1tfF~-1mtlrt19r~J:tfJL~
o
2.
oo~~J:ttJLH
5~·;D!¥}tftlli
lOOmm-1£:~:#-.o
To
thread the eyes
of
the needles in the order as shown in Fig.5:
1)
To
make thread go through the eye
of
the needle outwards. (View from the operator's side)
2)
To
pull out
lOOmm
of
the remaining thread after needle thread going through the eyes
of
the needles.
005
Fig.5
-3-
1\.
..
J(E~(I{J~~(006
..
007) I The threading
of
bobbin thread (Fig.6
..
Fig.7)
}({ ~ 1ti
00
~
JiffiJ=f'ft(
iX
~
tt
~
~1L
o
1,
1ti
(006)
Ji]f~~tt
~
~JHi~it!iti$F~;fi,
1mffltfr:!lt::ktr.J~~~~3JB1rmili*4Ji!87df.JB1f'*~~
=
t-1Lo
2,
re
(
00
7)
9='
tr.J
fJi
J'i
~iJHi
1'F A Bd9!tl
tL
A~
r"J
1:
1ft~
o
3,
~~tt~B>t,
Jfl[)f.tflf:9='tr.J~fl~tl(00Ji]f~~~~:tl,
1£~tttr.J!Wllffii*ili50mm*~~o
To
make bobbin thread going through the eye
of
the needle
in
the order as shown
in
(Fig6 and Fig7)
I) Make the bobbin thread go through the tension guide plate; go through the two holes when thread
of
harder twist
fibre
is
used and feed gauge is wider than Usual.
2)
Pull the spring toward the operator, as shown
in
Fg.7 and part A will rise upwads.
3) When threading the looper, the thread shall be made go through the eye
of
the needle with a tweezer as shown in Fig.7
and 50mm
of
remaining thread be pulled out.
007
Fig.7
-4-
1L
..
~~~(008
..
009
..
0010) I
Thread
tension asm. (Fig.8
..
Fig.9
..
Fig.10)
008
Fig.8
009
Fig.9
m~*n~~~(008~~):
~~~~~~~~*n~*o
*~*n~~~(009~~):
~~~~~~~~*n~*o
*m~~**
(OOIOJi)f~)
19tilt~~~*10Co
To
adjust needle thread tension
is
accordance what sewing working
condition,we can adjust needle thread tension
by
tension spring.Tum
the tension nut
clocwise
to increase to increase the tension; turn
counter-clockwise to decrease the tension.
To adjust bobbin thread tension:
Turn tension screw clockwise to increase the tension;turn tension
screw counterc lockwise to Tension; tum tension screw counterclockwise
to decrease the tension.
The relation between the needle thread and the bobbin thread as
shown
in
(Fig.l 0) depicts the forming
of
chain stitch.
0010
Fig.lO
f{ij~
Needle thread
}ij;~
Bobbin thread
+
..
ffiJJ141(0011
..
0012) I Presser foot (Fig.11
..
Fig.12)
0011
Fig.
II
0012
Fig.l2
ffi}l!pffin~~~
(0011)
:
J®i~~~ffilm!~ffit~n.
ffin
*~·
&~~ffin~-0~
H~Mffi~.
ffilm!
~ffit~tJ~;J>ifliWJil1927-30mm
(5*
JT)
tr.~
o
¥Rffilml~~~m~ffiW,
R¥reffilm!fi~~tr.~~~~
~
ep
l=iT
( m
12)
0
Adjustment
of
pressure on presser foot (Fig.
II)
Turn pressure regulating thumb screw clockwise to increase the
pressure; turn pressure-regulating thumb screw counter-clockwise
to decrease the pressure.For general fabric the standard height
of
pressure regulating thumb screw is about 27-30mm (5kg)
The presser bar lifter shall be turned either leftward or rightward
in
order
to
keep
the
presser
foot
under
the
condition
of
lifting
position.
-5-
-t~ ~
~Jei}{JiJJil(0013)
I
To
adjust stitch length (Fig.13)
0013
Fig.13
I,
H~¥:1ll¥-JiJWi'i(0013)7t~ME~jtl:G*41&-f-
l:ool¥-JHH~iJWi'i
n:tm~m••*~~on:Eml:•ll~ft*fflmm~~o
2,
H~M*¥'J'J,t&3t::GM~Jllll1,
m-:iti¥.J-fitJ:G*41&-f-!Mr
ffi;
-:iti~l;tJ:iliMH~MEffio
3,
H~¥:J!tii::k1!4mm,
iitJ'J!
1.4mm.
4,
t!(rffi'l:ili*41&-f-,
H~~79~m~(l.4mm),
i~J}J~~m=r
~
~
fn
~
11:~
!!X
w
no
si
~
~JJ
t¥J
t:'f~
7t
0
5,
*;fJL~~;i!fjff;tl~o
1.
Turn feed regulating adial to the figure desired. The value
of
gra-
duation
is
shown in millmetren(mm)
2.
If
you intend to change the stitch length, press down the reverse
feed lever while turning the feed regulating dial.
3.
Max.,stitch length is 4mm:Min.stitch length
is
1.4mm.
4. When reverse feed lever is pressed down, tight-needle stitch
of
1.4mm will be formed;this version
of
stitch is suitable for be-
ginning and end seaming or partaking.
5.
The machine can not make reverse stitching.
+=~
f]L~I}{J=t:~(0014~
0015) I Setting-up
of
the needle
(Fig.14~
Fig.lS)
l¥114
Fig.l4
Fig.15
Feed direction
l
CD®®
0®0
1:E~ffl1t~f~B>t,
;fJLftft=FLI¥-JtirfiJ~~~D(OO
14)~Cl¥-Jti
[fi)~~o
;fJLftil!f~TVx71¥J#9-#21
ru!;f]Lft
o
ffl
1t~f~~iliUII1,
~t!(
(00
15)JiJT~%:t\:1Nini
i
nb,
nbii/ili~!l~li::iliU
o
When thread
of
chemical fibre
is
used, the direction
of
the needle
eye shall not be in that one, as shown in part C
of
Fig.14. Needle
types to be desired fall within the range
of
#9
to
#21
of
TVx7; Oil
tank shall be custom-made when thread
of
chemical fibre
is
used;
silicone oil can be placed like that, as indicated in Fig.15.
-6-
-t
~
1IJJ!Pil6JtB9iJl3i'i(0016) I Adjustment
of
the height
of
the presser bar: (Fig.16)
0016
Fig.l6
@i)
~m~~
t
rPresser
bar
guide set screw
o I
~7~~ffi~~~~~~-
~~~~:
1,
fJfrffiH&l:I¥-HL~
(0016)
2,~~ffiff~~~~~~n*fi~~o
3,
~~!§~~~~~~no
For the requirements
of
either replacing the presser foot or
changing the height and angle
of
presser foot, the following shall
be observed.
1.
Take off the rubber plug
in
the hole from the face plate,as shown
in Fig.16.
2.
Loosen the presser bar guide bracket set screw.
3.
After adjusting, retighten the screw.
+1m~
:i!tl~ff.Jifnj~(0017
~
0018)
I
Adjustment
of
the
height
of
the
feed
dog
(Fig.17..
Fig.18)
~~
..
·:.-
0017
~
~
BlW
Fig.l7 A type B type
~r~(
oo
1s)
?Jf
~
~~n
Q)
, **4
7f
~
ftji
~en
t:iT
ifnl
11
nX:t-r.
at~,
A~,
B~,
J2ifl7fii::k~ili
:!I
~0.8mm,m(0017)~~~nCD~
-H--
Ilo
Loosen the set screw Q), as shown in Fig.18, the angle
of
the
feed dog can be adjusted to the specified one
of
standard version,
A version, and B version. The Max. height
of
0.8mm
of
the proje-
ction from dog
is
adjustable by the adjusting
of
screw
CD
as shown
in
Fig.17
-tii~
i2itf7f
~*OOIPJ~(0019)
I The timing
of
feed dog and needle (Fig.19)
0019
Fig.l9
tf~rl*~ftt&l:~ffi3mma-t,
*fl3f~1Jfff~tmrl*~ft
t&J:~ffi[;Jr,
!lta-t,
lE!fflllJtv
0
t:iT~Ti(OO
I9)~~~~n
0
When the point
of
needle lowering down to the location
of
3mm from the upper surface
of
the throat plate, the feed dog
is
right
at the position below the upper surface
of
the throat plate, viz. The
running
of
feed dog being well regulated in relation to the motion
of
needle.
-7-
+
/'\
..
ftfffi6ltB9iJJTi(l!l20)
I Adjustment
of
the height
of
needle bar (Fig.20)
0020
Fig.20
ftJtiTVX7;t;JL*Bof,
PJffl*ff
J:ff.J~Ijt&,
*ff:f±r~-~Bof,
ttff
J:~Jt&Mx.tilttffrM~I¥1r~oo(~noo2orJT7F),
j!f'fJM:
{jt~
T*ffff.J~}jto
When the needle
of
TVX7 is used,
if
the graduation on the
needle bar
is
at the bottom dead centre,the mark
of
graduation shall
be
in
line with the lower end
of
the needle bar bushing, lower, as
indicated
in
Fig20.
+-1::
..
lJLltf;JJ~ltl'f.JifnJi1(0021..
0022)
I
Adjudtment
of
the
needle
and
looper
(Fig.21,.
Fig.22)
8
l
0021
Fig.21
0022
Fig.22
tt
needle
~ *
ffrJ
J§
~
l;IJ:fll¥1
00
i'i :
~~llrllllJi}'fiffiJi'iPJ1~~*Wffml~l;IJt:f:t(0021
)fi]f7FI¥JBR
>t,
im1tBI¥JR>t:f±Mi*.B1793.
7mm,
~;fttlm!~ff.J;t;JL*:mttE:~~lJJo
1.
tfir~ttDtlm'lJ~J:I¥11t~*(0022)
2.
Jtl=f~z.;J)J:$&:0
3.
~~~~~~n~~~~n.OOi'i~~%1¥J~Uo
4.
ffiiffili'i~UJ:I¥1~~~~~~~~.
~Bff.JR-.J-8~~*·
OCZ~Ij'\0
s.
~~~~~'-Ufo~~~'-n
0
Adjustment
of
forward & backward motion
of
the looper:
The dimension
of
part B
of
the looper in an elliptic motion can be
measured,( refer to Fig21
).
The max. dimension
of
part B
is
usually
3.7mm, suitable for sewing operation
of
needles
of
all kinds
of
sizes.
The adjusting procedure
is
as follows:
1)
Take off the rubber plug on the crank case
of
the looper (refer to
Fig22)
2) Turn the balance wheel by hand.
3) First loosen set screw and positioning screw, and then adjust
marked screw.
4) Turn clockwise the adjustable screw on which punch mark
is
printed, and the dimension
of
part B will be increased in value.
5) Tighten set screw and positioning screw.
-8-
+
!\..,.
~ft*H~f)Lft(J9~~(0023)
I The timing
of
looper in reference to needle (Fig.23)
0023
Fig.23
mtta•~~at.~ttm~am.•~oo~m~~¥-J•nm
fi
1"1
tviffil~(-tln
0023)0
The looper shall be moved backward to the lowest position
while the needle is at the bottom dead centre; loosen the screw on
the gear and make timing adjustment
of
the looper in relation to the
needle (refer to Fig 23.)
+11,.
~ftB9-t.Jn:E:C0024)
I Thread-guiding amount
of
the looper (Fig.24)
1,
~tti¥-Jtt~~~J:ititrttti¥-J!=f•l)fll:JiB>t,
~tttt~~*JLtf":fLJ:ltffiii¥-J~E~tT-<lfi:J!:2mm,
!ltB>tttffr~IJ~~ottff
r~t~rliffiloox.J1f
0
ctmrB24)
2,
~tti¥-JJ§miH'.J3.5mmo
3,
fJLtt:fL~o~tt:fLI¥-JfBX>f*
~
-tln(rB24)PJf~
o
(li:1i~tt
PI
LV,
Jt~ljiffil~)
1)
The standard value
of
the vertical distance
of
the point
of
the looper away from the upper end
of
the eye
of
the
needle is 2mm, then the graduation mark on the lower part
of
the needle bar shall be in line with the lower end
of
the
needle bar bushing, lower.(refer to Fig.24)
2) The value
of
the stroke moved backward by the looper is about 3.5mm.
3) The relation between the eye
of
the needle and the eye
of
the looper is indicated Fig.24.
(Note that the left Ioper and the right one can be sepatately adjusted.)
0024
Fig.24
2mm
~]
,_[
=
+,.
~ftf;n;f;)Lftfii)(J9(ii]~t
I The clearance
of
looper and needle
**•~~m.mtt~~ttoo@m~-~oog,
~m~m~ffimtt.mtt~~@m~~**~o~*oog
t/J\
7.
mtt~¥-Jimtloo
Ei~tttt~~~~*B!LTitttirmtJJlf%
0
After adjusting the needle guard, the clearance
of
a given value between the needle and the looper shall be kept
unchanged; the needle shall not touch at the point
of
the looper when it
is
pressed down softly.
If
the clearance
is
narrower
that usuaL the side
of
the needle and the point
of
the looper are apt to incur breakage due to the impact
of
the needle side
against the looper point.
-9-
0025
Fig.25
f*ft~B'.])PJ~(0025)
I The timing of needle guard (Fig.25)
'f*tt!#iff.J!m~.
E8
(0025)
9=t~-t;trmtA.~#*WJ:ff.J-!f
OOffiJ~JEo
The timing
of
the needle guard depends on the condition
of
the plane on the rock shaft
of
the looper when
no.l
screw has been
screwed into this rock shaft.
~ + ~
..
f*ft~B'.JffliH0026)
I Position of needle guard (Fig.26)
0026
Fig.26
m~'f*tt•m•.
~~H~Roo~~ftmttff.J#~ftftM
&f*#.,
:ttiWJJi:lili00~¥1J~iD!fl&~IE1*#.mffil,
Mft~(0026)
9=t
t;
tJ
CD
CD
E!P
llJ
:i£
fi
0011
o
ll!!IIE'i*tt•fllMZ;/J'f*#•zralff.J*
~Ctm0026)rJT~,
.!§l;t-JLH
ff.Jral~~:Y!JO.l-0.
2mm,
~m;t-JLm~~~tre~!llfi~ttmH
0
Oscillating the needle guard to make the needle tip contact with
needle gauge slightly.
It
is recommended that the height adjustment shall not fall
within the area
of
the left counter needle guard. The adjustment can
be made by loosening screw
CD
and Q). The relation between left
counter needle guard and the counter needle guard is as represented
in Fig
26;
the clearance from the needle falls within the range
of
0.1
to 0.2mm.
Note that the forced clamp
of
the needle
sha11
be prohibited
when the machine
is
in
motion.
~
+~
..
JitE~fr~8~(0027)
I Looper thread take-up
cam
(Fig.27)
0027
Fig.27
m;~n~8~ff.Jmiltm
(0027)
rJT~,
ttff1:Eltl.WJ.~~,
tr~8~-!fiil'iiiHtfllWJ~-!ffifi~Jti¥-J~~:Y!7
18°-20°,
Mft~t;
trB:i!fiiJJ~,
m•~~Eml'fmt~
0
-~~-~-~~-~=Jij;~Mtr~8~1¥-J~~A~lli~,
H~~%1tt:il!:A.m;~~#I¥-J~*9=t
o
Its position can be seen as shown
in
Fig.27 when the needle bar
is at the top dead centre, the planes
of
the cam and the steel wire are
in parallelism; the projecting part
of
the cam can slightly rise at the
angle
of
18 to 20 degrees. first loosen screw B,
and
then make
adjustment, finally tighten the screw fitmly. Pay close attmtion
to
the
following; the needle tip shall entirely come into the thread loop
of
the looper when the bobbin thread rejecting from the projecting
part
of
the cam.
-10-
~+nn ~ :hll-~-ll:~
-
l:~PEEJ--f+"-H;;.V..{\OO.(Im
28
)
I The position
of
the
thread-am~unt
adjusting plate
~.
1?c:;:x.n
:;:x.~JJPJll1~1l~
!LJ3
..
rn
of
the thread take-up lever (Fig.28)
0028
Fig.28
#fftE:I&flf:.~at,
~ll(0028)JiJT~,
JlH:J~~ff~ihJJlit&~
ttm~.~n~•m~at.
m~~*~*o
Jltj~,
#ff1£RH!f:~B1,
-fft;fftft~oo~~*~1'FJff,
:iim-
1£RJff~$~RWB1,
@re~-~lit&~~:I&A~o
The thread-amount adjusting plate will retain the bobbin at
thread when the needle bar
is
the bottom dead centre; in such a way
the loop
of
the needle thread is to become bigger when the needle
thread
is
hooked. In addition to the foregoing there is afunction
of
the tight pulling
of
the needle thread loop. The thread-amount adjusting plate usually reduces to the lowest point when a thread finer
than normal
is
used.
Note that take-up thread tension lever
is
another name for thre-
ad-amount adjusting plate.
=+n,
~~iij~~~(m29)
I Frame thread eyelet (Fig.29)
0029
Fig.29
~oo~~~~m•-m*~~•tt~•~~.-•re~~m
W1'F~¥fl(0029)
till
~#8o-#so
till
~#30-#20
1-tH~#S0-#50
11:~f~#30-#20
~ral~~t~~Jlt2-3
~
ral~~~~Jlt3-4
~ral~~t~~Jltl-2
~ral~~t~~Jlt2-3
The improper-positioning
of
the frame thread eyelet my be the cause
of
occurrence
of
skipping stitch.
The following locations are generally regarded as criteria (refer to Fig29)
Cotton
thread#80~
#
50
Graduation marked on the frame thread eyelet 2-3
Cotton
thread#80~#50
Graduation marked on the frame thread eyelet 3-4
Thread
of
chemical fibre
#go~#
50
Thread
of
chemical fibre
#go~#
so
Graduation marked on the frame thread eyelet
1-2
Graduation marked on the frame thread eyelet 2-3
~
+·
/\,
fttitr.JiJJ~(m3o)
I Replacement of throat plate (Fig.30)
[!130
Fig.30
tt-Jttlii!Hl!
Stitich length
J;ttf.i!RfJLI¥-Jft;fitfj}~)\(ft~~~l/4"
(6.4mm)o
(0030)
t&~R~rallle:iim-lillat!f£~:
1,
tt~
2,
fflffijj!p
3,
tt
4,
:iiiM?f
5,
ml911?#ff
6,
:ffi:lll~tr:~ttfl:ltt~#t£1/8"
-I/2"##i~~zP-J~:iim
0
##i•lt*B1.~~~~#*ffi11~~-~fl:l8~~0
The sandard size
of
the throat plate
in
parts book, which
is
stipulated by the manufactory,
is
1/4", equivalent to 6.4mm. (Fig.30)
The replacement
of
the following components
is
ususlly needed
at the time when changing the gauge
of
double-row thread stitch.
-11-
l.Needle clamp 2.Hinged foot 3.Throat plate 4.Feed dog 5.Rear moving needle guard 6.Curler
The left and right loopers within the range
of
the sizes
of
1/8" to 1/2" are inerchangeable.
In addition to the aforesaid, the replacement
of
slide plate and cam cover shall be made when the width
of
thread
plate
is
on the increase.
=:
-t-1::..
~W*'Lf.Jf**
I Maintenance of
the
machine
~7Ramm*M~~~I~~~.
~--~~•~=
(-)
4!JB~·®H~t~~-~:
1,
Jg!f!<flit,
narili*J~nat£~~.
2,jg!f!<flit.
-
~-~~~~a.
~~w~•m~~·*••mi*~•.
(_ )
4!Jf,!fj
-
jj(~-$1ft:
1.
~~~fi.mti.
8~~.
m•~m~mMw~~~~~.
2.rem~nft.*~na•M•~~~~•&na&I*J~~~.
3,
£m~mnammM.
R*~~naa~mna•nm~Rna.•A~~~mna.
4,
il!Iiii~·®i!Wirfi:{IUl
(LOW)
5,
m~•*m1:Enaaaa~~mm.
The folowing shall be abhered in order to keep the machine in good working condition.
(
1)
Daily checking
I. The oil shall spray onto the oil sight when the machine
is
running.
II. Repairman shall be sent for when abnormal sound is heard during the operation
of
the machine.
(2) Locations to be checked once a week:
I.
To
take
off
throat plate. slide plate,and cam cover; to clean dust
of
the slotted feed dog with a brush.
II. To turn over the head to rid both the oil filter screen on the oil pump and the interior
of
the oil reservoir
of
oil
stain and dust.
III. Loosen drain hole screw and take it off;drain all the dirty oil from the oil reservoir and reoil it.
IV.Oillevel must be above the lowest oil-level-indicating line marked
"Low"
V.
The black powder,adhering to the magnet in the oil reservoir shall be wiped with sponge cloth.
=:
-t
J\..
ii,i~$f;llfljM§
I
Ommon
breakdowns
and
measures of
trouble
shooting
-*%
-~I*J~
mt
~
X>j
*
1'
-~JVJ:-~
1'
~fflmi::l:tff~-~
2.
-~:k*!l
2.
iffil•~m~•~
3.
m~M~~urr•~
3,
ft
m
1i!
na
!!X~
f~t!f!<
~
I
rwr
~
4,
·~*:1J:idi
4,
tifEf~~~l~-Ht
5.
m~.
~~.
~t&.
*~~M~
5.
mna:P!fi7'tNthll7't
m57ttmm
6,
~
::1:
*
iJWil
tlT
6,
iffiJ
Ti
~-
iJWiltli
-12-
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