JUKI LZ-271 User manual

MODEL
LZ-271
HIGH SPEED. SINGLE NEEDLE.
EMBROIDERING
INDUSTRIAL SEWING MACHINES
Instruction Book
L2-27t
TOKYO JUKI INDUSTRIAL CO..LTD.
From the library of: Superior Sewing Machine & Supply LLC

CONTENTS
I. GENERAL DESCRIPTION
1 Special features 1
2 Names of parts 2
3 Sewing speed 3
4 Installing the machine 3
5Bobbin winder spool pin •••• 4
6Specifications 5
II HOW TO OPERATE THE MACHINE
1 Lubrication 6
2 Oiling the rotary hook 6
3 Needles 7
4 Threading the machine 8
5 Winding the bobbin thread 9
6Inserting the bobbin into the bobbin case 10
7Fixing
the zigzag width of throw 10
8Embroidering
with a fixed zigzag width of throw 12
9 How to
set up the embroidering hoop 12
10 How to embroider 13
11 The thread tension 13
12 When the thread breaks 14
13 How to use the attachments 15
III ADJUSTMENT OF STITCHING
1 Timming and adjustment of needle throw 17
2 Adjusting the correct position of the needle throw 17
3 Matching the rotary hook with the needle 19
From the library of: Superior Sewing Machine & Supply LLC

I GENERAL DESCRIPTION
1. Special features
This is a high speed industrial sewing machine forembroidering. With
a speed of 1,700 stitches per minute, it can produce a width of throw of
12m/m (15/32") but if the machine is used at lOm/m (25/64") width of
throw, it can embroider at a fast speed of 2,000 stitches per minute.
This machine can, not only embroider designs on light weight or heavy
weight materials, but it can also embroider names and all kinds of marks to
produce attractive and inviting embroidered work.
Fig. 1 Complete View
From the library of: Superior Sewing Machine & Supply LLC

The design of this machine is of beautiful two-color tone and as the
lubrication is of a centralized system, it is not necessary to oil the parts
at each instance. Also, as the presser bar is of joint rod system, it is not
to push the presser bar up or down when installing an attachment.
2. Names of parts
Refer to Fig. 2 for the names of parts of this machine
(J) Link take-up
<3) Frame thread guide, upper
(D Frame thread guide, lower
(7) Tension disc
(D Zigzag width regulating knob
® Zigzag width graduator
© Hand wheel
Take-up spring
Thread take-up guide
Three-hole thread eyelet
Needle thread guide pin
Zigzag width regulating lever
Bobbin winder spool pin
— 2 —
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3. Sewing speed
As previously mentioned, the speed of this machine at the maximum
zigzag width of throw of 12m/m(15/32") is ,1700 stitches per minute and
when the zigzag width is less than 10m/m{25/64''), it can embrioder at the
speed of 2,000 stitches per minute.
The rotation of the machine determines the sewing speed. The number
of rotation varies with the electric cycle and the diameter of the motor
pulley. (Refer to Table)
Speed
Cycle
Motor pulley
1700 50-0
MTK-P0075000
60-O
MTK-P0065000
2000
50-O
MTK-P0095000
60-O
MTK-PV080000
Unless otherwise requested, this machine's motor pulley is of l,700s.p.m.
type but if a different speed is desired, please order our agents or exclusive
dealers.
The power of the clutch motor attached to this machine is a single
phase 200 Watt (1/4HP), so to ensure a long life of this machine, it is
highly recommended to use a motor pulley of l,700s.p.m. speed. ^
4. Installing the machine
(A) Correct height
Install the machine on the table and shake the machine a little to see
if it's uniformly even. When all the corners are even it should not move
but if any one of the corners is uneven, it will rattle.
When it rattles, nail in a thin felt cushion pad B (B-8208-012-000) (four
of which are in the accessories box together with nails), under the low
corner and make the height even. Be sure to nail in the head of the nail
deep inside the pad until it sinks into it.
Unless the height of the machine is installed evenly, it will not rotate
— 3 —
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quietly.
(B) Leather belt
Normally, this machine uses a leather belt, but following should be
observed:
(1) Should not be too tight. At first, the leather belt is very stiff, so
often it is liable to be too tight- When it's too tight, the machine will
vibrate.
(2) Joining of the belt. Normally, the belt is joined with a wire.
When the joining is out of alignment or when the wire is sticking out, the
machine cannot be run smoothly.
(3) Positions of hand wheel and puUcy- Unless the hand wheel and
pulley are in correct positions, the belt might be curved or twisted, hampering
the quiet running of the machine. In such cases, move the motor position
and correct them.
5. Bobbin winder spool pin
For the convenience of packing, the needle thread guide pin and the
bobbin winder spool pin are removed from the machine and packed sepa-
ratery in a vinyl bag.
The needle thread guide pin can be lightly tapped in and inserted. To
install the bobbin winder spool pin, remove the top cover of the machine.
Just loosen the screw at the top of the cover and it will come off. Then
insert the bobbin winder spool pin from front, plug in the nut from rear
and tighten it with a wrench. (Fig 4)
Fig- 3 (D Needle thread guide pin ® Bobbin winder spool pin
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6. SPECIFICATIONS
Model
Sewing speed-
Width of throw-
Needles
Lubrication
Usage
Single needle, lockstitch, embroidering sewing
machine
Up to 2,000 s.p.m. (width of throw max. 10mm)
(25/64")
Standard 1.700 s.pm.
0~l2mm C15/32")
DBxl it9~itl8 (16x231, 1738) Standard #11
Centralized hand oiling type
Embroidering work on all light weight, medium
heavy and heavy weight materials
Adjustment of width
of throw of throw Adjusted by the knee lifter (without setting
indicator of width graduation)
Attachments Possible to install compass embroidering and
cord embroidering attachments
Sewing space 270 mm {10—5/8") (From needle drop to the
root of the arm)
Size of bed 178mmx477mm (7-1/64"x 18-25/32")
Lubricating oil New Defrix Oil No. 1
Sewing space-
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II. HOW TO OPERATE THE MACHINE
1. Lubrication
Lubricate the oil holes marked in red with New Defrix Oil No.l, 1 to 2
drops every day (Fig. 5). But to the holes (i) (3) ® ® marked with
heavy red mark, lubricate about 5 to 6 drops every day. There are oil
reservoirs on these holes and from here all the essential parts are supplied
with oil.
Fig. 5 Oiling holes
2 Oiling the rotary hook
Every day drop 1 or 2 drops of oil to the hook groove of the rotary
hook shown by the arrow in Fig. 6. This oil soaks through the felt which
is inside the hook and lubricates all the essential parts of the rotary hook.
— 6 —
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Fig. 6Oiling spots of rotary hook
3. Needles
Select the needles according to the embroidering material and the
needle thread. (Refer to Table).
In setting the needle, be sure that the carved part is on the other side
and the groved part of the needle is facing the operator. (Fig. 7)
Material
Scarf
Light
Handkerchief
weight Blouse
Medium Velvet
heavy
Heavy
weight
Name mark
Heavy weight
Needle thread
DBxl Embroidering thread
(IGx23l) (Double-thread twist silk)
9—Sll i75—•?120
DBxl Embroidering thread
(16x231) (Double-thread twist silk)
?11—J|14 S102
DBxl
(16—231)
#11-S14
DB—1
(16x231)
314-j|l8
All color cotton thread
250
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Groove
Needle eye
4. Threading the machine
To pass the needle thread,
follow the numerical order
as shown in Fig. 8. Start
from the needle thread guide
pin (J), (not shown in Fig. 8),
to the needle (D in order,
(Refer to Fig. 2 for complete
view)
(2) Three-hole thread eyelet
(3) Tension disc
® Take-up spring
(D
Thread take-up guide
(D
Thread take-up
(Z) Frame thread guide,
upper
(D Frame thread guide,
lower
(§) Needle
-ai_
I
From the library of: Superior Sewing Machine & Supply LLC