ZOJE ZJ600 User manual
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From the library of: Superior Sewing Machine & Supply LLC
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From the library of: Superior Sewing Machine & Supply LLC
TABLE OF CONTENTS
ForeWord····································
..
···············································································1
1.
Brief lntroducion to The MOd8J·································•••·····•·········••··········•••·············••··· 2
2.
Main
TeChnical
Specifications···················································································· 2
3.
Mdachine Installation and Operation Preparation····················...
·····································
3
1.
Machine
installation·································································································3
(1)Unpacklng machine
head·······················································································
4
(2)Fitting machine
franme·····························································································4
(3)Fitting
machine
head·························································································
..·· 5
(4)Fitting
Work
plate components
.................................................................................
6
2.
Operation preparation
.............................................................................................
6
(1)Cieaning·······································
........................................................................
6
(2)lnspection·····················································..
··································"··········
..
·····
6
{3)Lubrication··············
............
,
.................................................................................
7
4. Opeation the Machine--·.......·.....·........·........·........····.....·.....·..·.....·.....·.....·..·............·7
1.
Rotating direction and sewing speed
of
main
shaft···--···
..............................................
7
2. Needle selection--..·..·
..
·..·..·.....··....·.....·...........·...........·..·--·.....·
..
··----·
..
··....·.....·····8
3.
Specifications--.....·.....·..·........·.....·.....·...
··
...·..·.....·.....·--·........·...........·...........·...·8
4. Needle replacemet--.....·..·.....·..·
..
·...........·.....·........·.....·
....................
·...........·..·
----8
5.
Threading········......
·································
...·········...···············......
························
·9
6. Feeding and
pulling
out
of
sewn materials
..................................................................
g
7.
Skip
stitch device··........·........··....·.....····
..
·.....·.....·..·.....··.......··....·.....····
..
·........··
10
8. Regulating feed dogs height··.....·
....
·.....·........·..·............·..·..·.....·.....·.....·......···...·
10
5. Adjustment
of
the Machine··
..
·..·..·.....·.....·
..
····........··.......·.....·..·..·...........·.....·.....·...·
11
1. Regulation
of
stitch length··--
................................................................................
11
2. Adjustmen
of
blindstitch sewing penetration--
.............................................................
12
3.
Regulation
of
the pressure
of
material retainer·...........·
..........................................
--12
4. Position regulation
of
needle and needle plate
........................................................
:--·13
(1)The front and the rear
of
position··---
......................................................................
13
(2)The positioning
of
location·····--·--··--......................................................................
14
(3)The
left
limit
position
of
the needle
...........................................................................
14
From the library of: Superior Sewing Machine & Supply LLC
(4)The limit of needle throw··············
.........................................................................
15
5.
Regulating position of needle and thread hook··
.............................................................
15
(1
)Basic position of thread hook··........·........·.....·.....·..·.....·........·........·.··.....·...................15
(2)Positioning of location for pronged thread
hook--
............................................................
·16
(3)Adjustment
of
the position of the
th'
'3ad
hook
..................................................................
17
(4)Positioning Of lOcation of thread hook
.....................................................................
18
6.
Regulating position of ridge forming disc and material retainer·--··...........·........·.....·..·......· 18
(1)The left and right position.................................................................................... 19
{2)Regulating of the front and the back posution......................................................... 20
(3)Disassembling and fixing ridge forming disc·--......................................................... 20
7.
Regulating presserpressure .......····.....·.....·........·.....·.....·..·
..
·.....·..·.....·.....·..·...· 2 1
8.
Regutating thread tension
....................................................................................
21
6.
Mode of Sale··..·..·....
·•
.....·.....·.....··....·.....
··
....·..·..·.....·.....·.....·.....·.....·..·.....·..·.....
·•
22
7.
Machine Head Accessories
..................................................................
,.................... 22
B.
Machine Frame Accessories··---............................................................................... 22
9.
Warranty Period·--··....................·
............................................................................
23
10.
Parts Book
............................................................................................................
23
1.
Machine casing and lubrication components··"·"
.....................................................
24
2. Main shaft components··"··
.................................................................................
26
3.
Feed dog and needle shan componentg
..................................................................
28
4.
Thread hook components
.....................................
;
..............................................
ao
5.
Needleplale components··
..................................................................................
32
6.
Ridge fanning disc and lifting presser
componenls·--··--·"''''"'"'"'"'"'"'"''""'""'"·
·· 34
7.
Disc oscillating and skip stitch components-
...........................................................
36
8.
Disc locking mechanism and
knee
lifting presser shaft parts···
....................................
38
9.
Thread tension and nipperparts components··
.....................................................
•·
40
10.
Work plale components
....................................................................................
42
From the library of: Superior Sewing Machine & Supply LLC
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Foreword
blindstitch sewing machine, another
product
newly developed
by
conglomerate is
now
dedicated
to
customers. This
Model
is
widely applied
to
blindstitching
of
either Chinese-style
or
Western-style clothes such as garments, skirts.
Up
to now, fewer
literature covering maintenance, operation, and principles, has been available on domestic
market.
To help customers have a good mastery
of
the essence
of
operation and adjustment
of
it, an
"OPERATION MANUAL"
is
specially written for reference
of
service men, operators and ad-
ministrative.
The model adopts needle bar thread take up and swing thread hook system
so
that an arc
needle and a thread hook may form stitch
tYPe
103
chainstitch
and
straight blindstitch .
It
is
also
equipped with a regulating device for presser pressure, thread tension, stitch length, blindstitch
penetration, height
of
feed dogs and blindtitch space etc. Only when appropriate parts such
as
needle, ridge forming disc are changed and particular mechanism regulated
C3J.1
the Model meet
. 1 .
From the library of: Superior Sewing Machine & Supply LLC
the needs
of
sewing various sewn materials
of
different thickness. Thus it has been well received
by numerous customers.
It's lifetime depends
on
not only manufacturing
quality
but also whether it is properly
operk
ated
or
repaired regularly.
Read instructions carefully before operating the machine.
1.
*)l.gjiifiji)-
1.
Brief
Introduction to The Model
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ZJ600
blindstitch sewing machine is ideal for blindstitching medium weight
materials such as trouser leg seam, lower hem
of
garment,
and the fronl
of
West-ern-style
clothes etc.
The model
has
fullowing features: Advanced construction, unique design, excellent perfor-
mance, smoother running,, precision fit, longer lifetime, aesthetic stitching, easier operation. It
is one
of
indispensable pieces
of
sewing equipment.
Welcome to patronage.
1.
:±:~tt*ni'.m
1.
Main Technical Specifications
(I)
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(2)
lllf!E~WM
2500
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2000<f
/7)-
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From the library of: Superior Sewing Machine & Supply LLC
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(l)Maximum
sewing
speed;
(2)Normal
sewing
speed:
(3)Stitch
length:
(4)Blindstitch
space
ratios:
(S)Lift
clearance
of
presser
foot:
(6)Needle:
(7)Thread~
(8)Eiectric
motur
power;
(9)0verail
dimension:
(10)Net
weight
of
machine
head:
3.
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NM75-!00(LWX6T#3-#4l
14.
5-7.
Stex
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14.8-7.
4tex
~1\11~
270W
SlOX
360X245(
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24.5~Jf
2500s. p. m
2000s.
p.
m
3-Bmm
1:1 2:1
7mm
NM75-100
of Modle
GLX
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14.
S-7.
Stex
cotton
thread
or
14.
8-7.
4tex
polyester
cotton
thread
270W
SlOX
360X
245(LXBXH)
24. SKg
3.
Machine
Installation
and
Operation
Preparation
1.
Machine
installation
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3 .
From the library of: Superior Sewing Machine & Supply LLC
(1
)Unpacking
machine head
Unpacking
machine head from its packing box. Be
sure
not
to
damage projecting
parts
of
macnine head
such
as
thread tension
assembly
and
tiuead
guide etc.
After
unpacking all compo-
nent
parts
and
accessories,
don't
throw
any packing material
about
without
checking
the
packing
li.!.t
to
avoid losing
parts
and impairing production.
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(2)Fitting
machine frame
(j)
Frist
connect
rear
stand
side
support
and
treadle
shaft
beam with side frame
(left
and
right),
and then link up
treadle
with
treadle
shaft beam by treadle
shaft
and treadle
shaft
base.
®Mount
the
motor
onto
the
table.
@Put
the
table
onto
machine
frame,
partition
the
table
at
the
centre with four table
wash-
ers,
and fix
the
table and machine frame with washers
and
wood screws.
@U;>nnect
upper
and lower
pull
rod with motor and treadle
lever.
put
on pull rod
joint.
Af-
ter
regulating
position
of
treadle
(left
and
right,
high and
low),
fix the treadle.and pull rod joint
to locate the treadle.
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From the library of: Superior Sewing Machine & Supply LLC
(3),Fitting
machine head
(!)Put pads
"A
• ,
"B"
,"C"
,
"0"
•
"E"
onto
the
table
in
order
as
shown
in
Figl.
Insert
four
hexagon
head
bolts
with small head"F"i.nto
the
holes.
After
putting
on
wash-
ers"G"and
"H",
put
on
hexagon
nuts"l",
tighten
the four
nuts diagonally,
and
fix
the
machine head
on
the table
(fig.
1).
®Connect
front end of
long
shaft
with
knee lifter
llfl
Fig.l
"K"and
sleeve"L".
When
the
crossbar
of
knee
lifter is 1
em.
distant
from the
front
end
of
table
"J", fix the
sleeve(Fig.
2).
""G
~H
I
@Put
on
"V"
belt "N", move
the
motor
leftwards
or
rightwards
so as to fix the
motor
under
the sewing table
after
making-
the
motor
pulley in alignment
with
handwheel. Regulate the
motor's
heig.ht in-order
to
make
the
belt in
an
appropriate
state
of
tightness.
@First
fix
the
motor
switch
at
the
bottom
right place
of
the
front
end
of
sewing
table for the
convenience
of
operation,
and
then
turn
on
the
power.
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From the library of: Superior Sewing Machine & Supply LLC
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(4)Fitting
work plate components(Fig.
3)
CDFix
bracket"
A" on machine head with bracket screw
~~'B"
(Spring
pin"JW
• short and long
spring
leaves are already assembled).
®First
turn
collar screw"G" up
tight
into the hole
of
work plate
shaft
"C",
a'nd
then
insert
the
work plate
shaft
into
the
hole
of
the
bracket,
finally
put
on
retainer
ring"F"
and
tighten
re-
tainer ring screw"H"".
Be
sure
to make
the
shaft
rotate
smoothly while
securing
the
work
plate
shaft
in place.
@Insert
positioning
pin
"D*
into
the
hole
of
positoning
sleeve"K"
and
turn
it
up
tight
with
screw
in direction
of
location.
@Insert
work
plate
shaft~~"C"
into
!he
right
hole
of
lhe
bracket.
after
regulating
the
height
of
the
wore
plate"'E".
tighten
screw"
IN.
@Be
flexible
to
open
oc
dose
work
plate;
cbpable
of
auto-lock
control
of
it.
2. Operation preparaUon
(1
>ll!litll!ff
mm*~~•~m~m*~~ffl$fijlflll**$*~~~Mm~M~~$~~~ll!lit~~.
0 )Cleaning
Before
operating
new
machine
head(or
those
which
haven't
been used for a
long
time),
anti
-rust
grease on each
part
of
machine
head
shall
1\e
cleaned
out
with
gasoline
and
dean
soft
doth.
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mm*~"'lll;;:
m
.p
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(Z)lnspection
Some
parts
of
new machine
head
may
get
loose
or
get
out
of
shape
due
to
vibration
incurred
in
transit
or
rough
handling.
after
cleaning,
the
machine
shall
be
thoroughly
inspected.
To
chect
the
machine head
by
means
of
turning
hand
wheel,
the
machine
head
shall
be
regulated
and
have·a
6
From the library of: Superior Sewing Machine & Supply LLC
test in case
ol
abnormal phenomena
such
as
running difficult of machine
head,
getting
loose
of
some
parts
etc.
(3
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(3)Lubrication
First inject several
drops
of
oil
at
all
points
sh-
own on the oiling
chart
Fig.
4-
before
operating
machine
so
as
to
ensure
the
lubricAting
of
the
parts
running against each>other, and
then
op-
m
4.
Fig.
4
erate the machine
at
a lower speed
for
several
minutes.
It
is required
to
oil twice a
day
at
least.
After oiling the machine shall
run
idle
for
one
or
two
minutes,
and
then
clean
the
greasy
dirt
on
each
part
of
it.
finally
start
sewing operation.
4.-
Operating·the
Machine.
].
"'lilf.l~
loJ
'ID!iiii
;f>:~~IIL~m~~M.~IJLJI,~~M~~.ff~~~#~~.flii!Lfl'~Wlll~&~m~m~
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fti!CF~'ii:.
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1~21-
Jl
~~mill.
#~!;.ii'AJJ;~t,O:!tlll!;f>:IJL~lll:lfl*
E·~~*ii!~~~~~*l:i!~~~®.
1.
Rotating
direction
and
sewing
speed
of
main
shaft
Rotating
direction
of
handwheel
shall
be
dockwise(observed
from
the
right
side
to
the
left
one),
it
is
recommended
that
the
sewing
speed
of
a new machine shall
be
lower
than
],
BOOs.
p.
m. In a period of one
or
two
monthS
of
~:1al
run,
the
sewing speed can
be
increased
up
to a max.
normal one
on
condition
that
the
operator
has
been skill in
operating
machine,
2-
jlt~>lill'
;tlllf*I:IJLJlO!l
GLX
!l!l
NM75-100
lil.#.il!!'!'f S
;f>:
LWX6T
l!13
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'tilL
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'l'i"J~
. 1 .
From the library of: Superior Sewing Machine & Supply LLC
2.
Needle selection
The
Model
selects
needle
NM75-
100
of
modle
GL
X
1,
on
equivalent
of
Japan
-made
needle
3ft:-
4
f:t:
of
model LWX 6T. A
certain
kind
of
sewing
material
shall
select
a needle
of
an
appro-
priate
size.
3.
f;t!£-'Oi!.ttr.!~
~Loom~s~~~~~~@~m~~~m~m~.~w~~~*~~~T~~~~~~m
ftf!l
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~
11
IJi
•
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75 7.
5tex
7.
4tex
i30'l':ffi".
i*lli!.
JEt.
90 9.
5tex
lli!.'B.&l';fl!l<P'I>Jll!itlll#J.
100 14.
5tex
}4.
8tex
IT
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•
3. Sepecifications
Select
proper
needle
and
thread
according
to
sewn
materials.
Needle
Size
Thread
Size
Cotton
Thread
Polyester
Cotton
Thread
Material
75 7.
Stex
1.
4tex
Light
weight
material
'"
!).
Stex
Mfflium
weight
material
!00
14. SteX
1<1.
8tex
Heavy
weight
material
4.
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4.
Needle
repalcement(Fig.
5)
Turn
handwheel
until
the
needle
reaches
the
left
limit.
Turn
penetration
cial(knob)
toward
position"1"
(where
minimum
arnount
of
penetration
is
indicated).
Remove
the
worn-
out
needle
by loosening
needle
clamp
screw"
B",
and
insert
new
needle
C"'. Calibrate
the
position
of
basic
8 .
From the library of: Superior Sewing Machine & Supply LLC
surface,
and
make
the
shank
come in
CO'ltaCt
with
po~ition
pin"E".
Turn
handwheel slowly and observe
the
movement
of
needle.
The
blade
of
arc needle shall
be
kept
in line
with
the left needle guide groove
and
swing.
Be
sure
not
to
touch
the
groove.
(Pro-
cedure
of
adjusting
the
needle refer
to
the
following relevant
paragraph.
)
Regulate
the
knob
to
its
orginal place,
turn
handwheel and
observe
the
occurrence
of
the
needle being
crossing
ridge
form-
ing
disc to avoid
making
the
needle
point
mildewed. Make
sure
that
all
bent,
blunt
or
mildewed
needles
be
replaced.
Otherwise,
it
impaires
the
normal operational performance
of
the
machine.
5.
!i'!l:IJ>ll<lfl
6)
«~f~.~m~m~£~m.~s*oc~~~~!l.
-7~£----,t~~.,r
r
~~
lll6 Fig. 6
0':15 Fig. 5
IE
6
Fig.6
5.
Threading
Turn handwheel until the needle reacher;
the
left
limit,
and thread in a sequence as
shown
in
Fig.·6.
6.
Ill
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!9
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6. Feeding
and
pulling
out
or
sewn materials
Before
operating,
push
pad
"A"
(Fig.
?)rightward
by knee lifter to lower left &
right
presser
foot"B"illld ridge forming disd
~c~~,
at
the
same
time,
set
material
under
needle plate"E"'.
After
regulating the position
of
material,
release th,, knee
pressuce.
~he
material has been preSsed firm-
9
From the library of: Superior Sewing Machine & Supply LLC
ly
with
presser
foot
by
action
of
the
spring.
When
sewing
operation
is
finished,
first
turn
the
handwheel until
the
needle reaches
the
left
limit,
and
then
reverse
it
to
make
the
thread
slip
off
the
thread
hook,
finally
lower
the
presser
foot
by
action
of
the
knee
lifter• pull
out
material
softly
and
cut
the
thread.
Thus
breakage
of needle and
thread
can be avoided.
7.1/ttt~I
IlL
!I,JlliEIHir:lf•
!10
=If
foil
11!
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-J'jjlj
(
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11!
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7.
Skip
siUc:h device
The
handle for
adjusting
intenal
is fixed
at
the
bottom
right
side
of
machine head
base
(Fig.
8a).
When
11kip
stitch
is
required,
(blindstitch interval
ratio:
2:}),
turn
the
handle
forward(to-
wards the
operator)so
as
to
get
a
regular
skip
stitch.
The
said
procedure
is
geD.erally
suitable
for
light weight material<Fig.
8b).
When skip
stitch
is
not
required,
(blindstitch
interval ratio 1
l;D
reverse the
handle(Fig.
8c).
C B b c
IE
7
Fig.
1 III B Fig. 8
B.
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'ft!(JJJS!il'lilflil!.
B.
Regulating reed dogs height
Feed dogs
height
regulator
is fix..d in the middle
f'_t
the
right
side of machine head
upper
arm
. 10 .
From the library of: Superior Sewing Machine & Supply LLC
base.
Turn
the
controller-
knob
11
A"
clockw-
ise to raise
the
feed
dog
for
the
sewing
of
lig.
bt weight
material;
turn
the
controller-
knob
"A,.
counter
clockwise
to
lower the feed
dog.
5.
~~rtil'OOI!
5.
Adjustment of the Machine
1119
Fig.9
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!f.
1.
Regulation
o£
stltcb
lengtb(Ffg. HI)
Depress
controller-
button
located
on
the
upper end
of
the
rear
of
the
machine head
upper
srm
base by left
hand
while
turnirtg
handwheel
by
right
hand. Click
can
be heard
when
the
lower
end of
the
controller-plug
is
inserted
into
a recess
of
the
eccentric sleeve.
The
falling of
the
plug
can be felt
by
left hand. Keep depressing
the
botton
and
turning
the
handwheel
by
right
hand
untii
the indicated
number
on
the left is in line
with
the
graduation
on
right
of
the
front
oblique plane
of
the
machine base.
The
steel ball in
the
hole
of
feed eccentric sliding sleeve has been
inserted
in-
to
a
certain
recess
of
the
controller
eccentric sleeve
by
action of
the
spring.
In
short,
if
a decrease
in
stitch
length is
required,
turn
the
handwheel
clockwisef
if
an
increase
in
stitch
length
is re-
quired
turn
the
hand
wheel
counter
clockwise.
Number
on
the
left of
the
pulley indicates
the
changing
of
stitch
length,
the
numbers
doesn't
mean
stitch
itself.
The
adjustmer.t
ran:~e
of
stitch
lengt~
is
{rom 3
to
8mm. Select
the
ideal
stitch
length 'according
to
sewn
materials
and
processing
requirement.
.
11
.
From the library of: Superior Sewing Machine & Supply LLC
2.
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z,
Adjustment
o!
bllndstllcb
sewing
penetration
Regulator
for ridge forming disc height is fixed in
the
middle
of
the
lower
arm
base,
within
which knob"
A"
is located
and
out
of
which indicating
ring"B
11
is located. Blindstitch
sewing
pene-
tration depends on
the
height
of ridge forming disc NC",
but
penetration
changes
with
the
chang-
ing of thickness for
sewn
materials. Before
operation,
a trial sewing
runing
of
several
stitches
shall
be
made.
Regulate
penetration
accordingly
with
the
degree
of
exposure
for
Stitching
to
make
it in
an
ideal
state.
Turn
the
knob
clockwise
to
lower ridge forming disc for a
decrease
of
penetra-
tion1
turn
the
knob
counter
clockwise to
raise
ridge forny.ing disc for
an
increase of
penetration.
Graduation
on
the
indicating ring
..
B"
indicates
the
changing
of
penetration
and
rotative
direc-
tion
of
the
knob(Fig.ll)
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Ill
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11
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3. Regulatfon
of
the p.-essure
o£
mate..J~tl
refalner(Fig.
12).
.
12
.
From the library of: Superior Sewing Machine & Supply LLC
The
needle
plate
of
this
Model
is
a
unive;-s~l
one,
and
suitable
for both light
weight
and
heavy weight
sewn
materials.
pressure
of
material
retainer
shall
be
regulated accordingly
with
the
changing
of
thickness for
sewn materials.
Regulating
procedure
is
as
foHows:
A.
Turn
screw"B"
clockwise
to
increase
pressure
for heavy
weight
materials.
B.
Turn
screw"B"
counter
clockwise
to
decrease
pressure
for
light
weight
materials.
4. Position regulaUon of needle
and
needle plate.
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(l)The
front
and
the; rear
of
position.
The
front
and
rear
positions
oC
needle"B" shall pass
the
eentre
of
left needle guide grooVe "
C
...
(Fig.
I3a).
If
the
needle
is
deviated from
the
centre.
loosen lock screw" A
...
, move needle
clamp
...
D"(Fig.l3b)backward
and
forward in a frame
of
reference
to
the
needle
shaft.
After
the
said positions complies
with
the
requirements.
tighten
the
lock
screw.
8
A
III
12>
Fig. 12
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13a
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I3a
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13b
Fig.
13b
From the library of: Superior Sewing Machine & Supply LLC
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15)
o
(2)The
positioning
of
location
There are three locations between
the
needle and the needle
plate(Fig.
14)
~
(i)The
space between
the
needle
and
the
bottom surface
of
the
left
needle guide groove"C•
shall
be
less than
0,
3mm.
®Be
sure
to
make needle
come
slightly
into contact with needle
guard
"J".
@ Make
the
tip
of
the
needle
cott.o!
right
into
the
bottom
surface
<KL
arc
surface)
of
the
right needle guidle groove.
Incorrect positioning will
resul~-
ir. breakag-e 'Jf needle and thread
etc.
The
following is
the
procedure
of
regulation~
Loosen two
bracket
set
screws
"H".
and
turn
two
bracket
regulating
screws
"I"
to
make nee-
die plate movable. When
the
relative location
of
the needle and needle plate is in accordance
with
the
requirement,
tighten
bracket
set
screws
of
needle
plate
in
place(Fig.
15).
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14
m
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(3)
The
left limit position
of
the
needle
LeftJimit
shall be
taken
as a frame
of
reference.
When
the
needle is
at
the
left
limit,
needle
point shall
be
flush with
the
right
side
"F"
of
the
left needle guide groove
of
needle
plate(Fig.
16).
The
regulating procedure
is
as follows:
14 .
From the library of: Superior Sewing Machine & Supply LLC
Turn
han!lwneel until needle
reaches
the
lelt
lim1t
posifion.
If
needie
doesn't
accord
with
the
said
req,urernt:m,
loosen needle
earner
screw"
A",
turn
the
needle
carrier-on
needle
shaft
until
needle
earner
snaU
be flUsh
with
the
right
side
of
the
left
needle
guide
groove
of
needle
plate(Fig.
l3b).
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(4JThe
limit
oi
needle
throw
The
right
limit
of
needle
depends
(,n
the
limit
of
the
needle
throw.
When
the
needle
reaches
the
right
limit,
the
neeote-poim
shall
be in
about
2mm
distance
from
the
right
side
of
the
needle
plate
(Fig.
17).
At
this
moment,
the
needle
point
is
right
put
out
of
the
limit
point
"E"
of
the
right
needle
guide
groove(Fig.
17).
If
the
positioning
of
location
is
incorrect,
the
limit
of
the
nee-
die
throw
shall be
regulated.
The
regulating
procedure
is
as
follows:
Remove
the
upper
arm
cover,
loosen lock
screw
"G"
with
screwdriver
through
the
hole
"H"'
on .the
top
of
the
upper
arm.
Turn
the
eccentric ball
shaft
pin
"F"
with
screwdriver
to
change
the
angle
o(
the
needle
shaft
throw.
Thus
make
the
limit
of
the
needli:
throw
comply
with
the
requirements
(Fig.
18).
s.
W!J<JZ!;;~tttr:ii~l'i
5.
Regulating
position
of
needle
and
thread
hook
(ll
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ill
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(!)Basic
position
of
the
thread
hook
Basic position
of
thread
hook is decided by
positions
of
crank:
"A"
of
thread
hook
and
main
shaft
"B"·
When
tne
mark
"."
on
the
crank
coincides
with
the
centu
of
"V"
groove
on
the
main
shaft,
fix
the
crank
of
thead
hook
in place
(Fig.
1.9).
IS ·
From the library of: Superior Sewing Machine & Supply LLC
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