Juki LK-980 Instruction Manual
BE98OOT0BOA
No.
00
V -
Model
HIGH
CYLINDER
LOCKSTITCH
INDUSTRIAL
INSTRUCTION
LK-980
SPEED,
t
BED
UUKU
1-NEEDLE
BARTACKING
SEWING
MACHINE
SERIES
Book
:V
ISmsu
-r
TOKYO
JUKI
INDUSTRIAL
CO.,
LTD.
CONTENTS
SPECIFICATIONS
GENERAL
Sewing
INSTALLATION
THREADING
NEEDLE
THREAD
ADJUSTING
ADJUSTING
ADJUST
ADJUSTING
RELATION
ADJUSTING
speed
AND
1. Assembling
2.
Mounting
3.
Howtoremove
4. Tilting
5.
6. Driving
1.
2.
3.
1.
2.
the
Lubrication
the
THE
TENSION
Needle
thread
Bobbin
thread
Thread
take-up spring 9
THE
LENGTHOFBARTACKING
THE
WIDTHOFBARTACKING
THE
FEED
THE
TENSION
BETWEEN
THE
STOP-MOTION
Stop-motion
Stop-motion
PREPARATION
the
machine
the
head
machine
the
table 3
and
the
motor
belt
cover
head
over the table 4
machine 5
MACHINE
tension
tension
TIMING
THE
RELEASE
NEEDLE
TIMINGOFTHE
AND
THE
MECHANISM
SHUTTLE
TENSION
DISC
regulating cam 13
frame
3. Driving pulley pressing plate 14
4. Brake ring
ADJUSTING
ADJUSTING
POSITIONING
ADJUSTING
ADJUSTING
ADJUSTING
ADDITIONAL
THICK
WHEN
WORK
TROUBLES
BAND-LOOP
KNIT
BUTTONHOLE
SMALL
OTHER
COTTON
SEWING
CLAMP
GOODS
BARTACKING
SUBCLASSES
stopper
THE
THREAD
THE
SAFETY ADJUSTING PLATE 16
THE
THE
POSITIONOFTHE
THE
WORK
THE
HEIGHTOFTHE
LUBRICATION
SYNTHETIC
FOOT
AND
THEIR
ATTACHING
BARTACKING
BARTACKING
SHUTTLE
CLAMP
THREADS
FOR
CORRECTIVE
MACHINES
TRIMMER
RACE
FOOT
NEEDED
MATERIALS
THE
KNITTED
MACHINES
MACHINES
MACHINES
SPRING
WIPER
WORK
CLAMP
FOR
THE
OR
USING
FABRICS
MEASURES
FOOT
USE
OF
SYNTHETIC
THREADS
No.2
. . . 11
...
1
1
2
3
4
5
7
8
9
9
10
10
10
12
14
15
16
16
I?
17
17
IS
18
18
19
22
24
24
26
26
SPECIFICATIONS
Sewing
type
Sewing speed (Max.)
Needle
bar
stroke
Thread
take-up
Needle
Feed
mechanism
Shuttle
race
Stitch
length
device
trimmer
system
thread
lubricant
motor
amount
winder
Presser lifting
Speed reducing system
Safety
Thread
Pedal
Bobbin
Silicon
Lubrication
Numberofstitches
Driving
: High speed, single needle, lockstitch bartacking, cylinder bed
industrial sewing machine.
:
2,200
s.p.m.
(1,700
s.p.m.
with
:
41.4mm
: Link
: DP X 5
:
Feed
:
Exclusive
of
the
(1-5/8")
type
thread take-up
#16
(standard)
cam
control
system
shuttle race whichis solidly associated with the front bushing
shuttle
driver
synthetic
shaft
fiber
thread.)
(Finely adjustable type in the axial direction).
: Standard : Longitudinal feed - 1.5 to 3.0mm (1/16 to
Maximum feed
Lateral feed - 8 to
Longitudinal feed -
Lateral feed -
(Subclasses):
90mm
18mm
60mm
(3-35/64")
(5/J6to5/8")
(2-3/8")
1/8")
: 6 to 15mm (15/64" to 19/32") - adjustable
:
Planetary
:
Double
:
Fully
ball system (V-belt used)
safety
device
automatic
thread
trimmer.
(Both needleand bobbin threads are trimmed under the needle plate)
: Single pedal
: Driven by V-belt, and can be used at any time
:
Built-in
silicon
lubricant
tank
: Double oil reservoir and centralized lubrication system
:42stitches
With18different
(standard)
subclasses
: 14to128
stitches
: 200W (single or 2-phase)
GENERAL
Model LK-980 is a high speed (2,200 s.p.m.) Lockstitch bartacking sewing machine consisting
of a cylinder bed. It is used to form bartacking on men's suits, trousers, casual wears, worker's
uniforms, overcoats and many other garments. Other subclasses are also available for special
purposes like, bartacking on knitted fabrics, button hole bartacking, attaching belt-loops and
sewingvarious shapes of bartacking. The maximum sewing size is 60mm(2-3/8") lengthwiseand
90mm(3-35/64")
crosswise,
and 18 types of stitch formation consisting of 14 to 128 stitches per
cycle are also available. If you wish to produce some other special shapes of bartacking, please
contact
withuswith
your
detailed
information.
* 2 different machines for large size bartacking
2 different models for large size bartacking are availabledependingon the number of stitches as
illustrated
below;
- 1 -
LK-980
(Standard)
42-stitch bartacking
272924
28-stitch
22
LK-982-5
bartacking
i6mtn
Max. sewing size :
Min. sewing size :
3xl6mm(l/8x5/8")
1.5x8mm(l/16x5/16")
Sewing time per piece : 1.2 sec.
Crosswise and lengthwise stitches produce a
smooth, attractive and tight bartacking.
Max. sewing size :
Min.sewingsize : 1.5x8mm(I/16x5/16")
Sewing time per piece : 0.8 sec.
Coarse crosswise and lengthwise stitches pro
duce a practical bartacking efficiently within
IGtnrn
3xl6mm(l/8x5/8")
2/3 of the sewing time needed for LK-980
without affecting the material.
SEWING
SPEED
The maximum sewing speed of this machine is 2,200 s.p.m. for normal sewing,but is 1,700 s.p.m.
for either
sewing
a synthetic fibermaterial or with a syntheticthread.
Considering
that the
sewing
works of today are made in most cases with synthetic fiber materials or thread, our standard
built-in motor pulley is for the speed of 1,700 s.p.m. If you operate the machine at such speeds
as 2,200 or 2,000 s.p.m., we are ready to supply a motor pulley and a belt upon your separate
When
order.
ordering, please indicate the desired part Nos. as per the table given below.
you use synthetic threads or materials for
your
sewing works, we advise you to make useofthe
When
siliconoil tank whichisinstalledin the machinehead for efficient and stable sewingworks.
The following table shows you the sewing speeds attained by the different combinations of the
motor pulleys and the driving belts. This machine employs 2 pieces of V-belts, one is for driving
the machine and the other is for decreasingthe pedal pressure. (Those pulleys and belts having
.(*) marks in the table are optional parts.)
Frequency
50Hz.
60Hz.
Sewing speed
(s.p.m.)
2,200
2,000
1,700
2,200
2,000
1,700
Motor
pulley
part
No.
♦B7101980000
»B7101980(K)B
B710198000C
♦B7102980000
♦B710298000B
B710298000C
Engraved
50
50
50
60
60
60
Symbol
2200
2000
1700
2200
2000
1700
Driving
belt
*48"
MTJVM004800
*47"
MTJVM004700
46"
MTJVM004600
*47"
MTJVM004700
*46"
MTJVM004600
46"
MTJVM004600
Pedal pressure
decreasing
*35"
MTJVM003500
*34"
MTJVM003400
34"
MTJVM003400
*34"
MTJVM003400
*34"
MTJVM003400
35"
MTJVM003500
belt
-2-
INSTALLATION
AND
PREPARATION
1. Assembling
Paste
the
installation
Make
the installation holes with spot
the
attached
holes.
machine table
pattern
paperonthe
surfaceoftable
facing
first, and then attach the
installing base,spoolholderbase,headsupport and tension
2.
Mounting
the
head
and
the
motor
* Attach the
bottom
dimensional drawing.
* Install
For
mend
then tighten the screw@.
toptodetermined
pulley.
motor
surface
the
making
you
machine
to screw the
installing base to the
of
the
base
your
work
the
positionsofthe
legs,
drawers,
table as
on the table
easier, we recom
bolt
® first and
motor
per
the
top.
z-^omm
* Attach the
motor
pulley to the
motor
by pressing it fully until the far side thereof
Tension
pulley
Motor
pulley
contacts
* Adjust
that
in
®.
sourceof50Hz., bring it to the
possible
thread
right edge of the driving
belt
* Adjust
with
the
the
endofthe
lateral position of
shaft.
the
the right edge of the driving
contact
with
the
bobbin
thread
But, in the case of 2,200 s.p.m. with the
left
to
the
extent
that
winderisactuated.
cover.
the
vertical
positionofthe
belt
the
Otherwise
will
with the height adjusting screw (D so
the driving belt sags in the center for
10 to 15mm(13/32 to 19/32") when you hold it with your two fingers. (Approx. IKg.)
Adjust the longitudinal positionofthe
motorsothat
the Hi-' nee between the tension and
motor pulleys becomes 2 to 3mm(5/64 to 1/8")
-
3-
motor
belt
as far as
touch
shaft
so
comes
winder
bobbin
the
the
motor
that
about
3.
Howtoremove
4.
Tilting
the
the
machine
belt
head
cover
* Put on the pressure decreasing belt and
adjust the lateral position of the tension
pulley and also the tension of the spring so
as to allow the tension pulley to work in the
proper
manner.
* In
caseofthe
standard
machine
which
has
a single pedal, you can simply connect the
chain to the starting lever However,
when you want to operate the machine with
2-pedal system, you must remove the ten
sion spring (D from the starting lever and
apply another spring to the pressure de
creasing
lever
d).
* Loosen the set screw (D on top of the belt
cover,
tilt
the cover slightly backwards and
push it up backwards to disengage.
(1)
Remove
(2)
Disengage
(3)
Tilt
tablebypressing
the
belt
cover.
the starting chain d).
the
machine
headtothe
down
thehook(D.
left
over
the
-4
-
5.
Lubrication
For
lubricating this
Defrix
Oil No. 2
(1) Before
(2) Apply the over flowing amount of lubricating oil to the oiling hole (5) and a drop of oil to
the
race surfaceofthe
However, when the machine is operated at the maximum speed of 2,200 s.p.m. or with the
thick threads, you must increase the
out
(3) Take
(4) Apply the silicon oik through the oilinghole 0 and verify if the thread passingthrough the
guide
the shuttle from it's position and clean it up every day.
thereof
is applied
shuttle
with
race every
silicon oil on
day.
amountofoil to be applied to the shuttle.
it's
way.
startingamachine
newly
set uporhas
long
periodoftime,
through
oil
rubber
locatedinthe
lubricating oil
head
and
race
surfaceofthe
Apply
10 to 15 dripsoflubricating oil
(about
20cc)
and
leaveitfor
machine,
or
Spindle
apply
the
plug
hole
(l) ,
saturate
machine
after
also
applyadropofoil to
shuttle
through
about
use
which has
not
been
the lubricating
after
bed
fully
tilting
race
each
oiling
one
hour.
JUKI
Oil No. 2.
used
removing
the
oil
with
the
machine
(2) .
hole
New
been
for
the
felt
the
the
(3)
a
6. Driving
(1)
(2)
(3)
(^)
*
Machines
grease
several idling runs before starting to stitch.
the
machine
Turn
the
motor
switch
The
standard
work
Tread
you want to raise it at this stage, you cansimply
Treadonthe
model
clamp
footat theupper
on the
pedal
pedal
numberofstitches.
broughtup, threadsare
Youmust
automatical
machine
starting
foot is
release
process
stops
pedal
readytowork
machine.Insuchacase,
may start to run heavily in the morning of a cold season due to the viscousness of
with
which
on.
whichisoperated
slightly,
andthe
fully,
and
Whenaseam
trimmed
the
pedal
immediately
willbehindered
during
the first stitch,
strongly.Ifyou
on it's
you
must
each
bearingisfilled
position
work
the
machine
and then the
try to start the
position,
repeat
withasingle
when
the
machine
clamp
foot
release
will
was
starttoformabartacking
completed,
machine
after the
and
machine
will
not stop at the
althoughitwould
machinebymistake
the
safety
the
up. If it is
- 5 -
device
procedure
happened
pedal
stops.
will
come
the pedal.
the
stops.
not
will
from
system
will
downtopress
work
clamp
hasstarted to
expected
happen
actuate
the
beginning.
in your
machine,
bringupand
seam
foot is
seam,
hold
the
material.
withagiven
automatically
otherwise
position.
If the
so often, tread on the
before
the
work
clamp
immediatelytohold
provide
it with
the
If
it's
the
* Verify if the motor rotates in a counter
clockwise
direction
which
is shown by the
arrow mark on the driving pulley.
A reverse
your
machine.
rotation
will cause troubles
with
"If the
machine
does not start to operate
even after the pedal has fully been trod,
turn
off
cover, and
the main switch, remove
rotate
the knurled shaft
the
neighbouring with the driving shaft fully in
a
direction
it goes.
(Note)
showninthe
illustrationasfar
When you manually rotate the handwheel,
turn off the main switch first,
disengage
upper end of the spring (2)and rotate the
driving pulley twice in the direction shown
by arrow,
handwheel
and
with
you
your
will be
hand.
abletoturn
belt
(X)
as
the
the
'
-6-
THREADING
*
Cotton
thread
Pass the
needle
THE
MACHINE
threadinthe
orderasshowninthe
illustration.
After
it is finally passed
the needlehole, pull it out for about 4cm(1-1/2") therefrom.
*
Synthetic
fiber
thread
Passit additionally through the silicon lubricant thread guide.
OldUKI
g In
caseofsyn
thetic
thread
*
Thicker
thread
If a thicker thread is used, passit throughone of the thread holesof the needlebar thread
through
guide.
- 7 -
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