Siruba LZ457A Datasheet

LZ457A
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INSTRUCTION AND PARTS LIST
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KAULIN II FG. CO.,LTD.
From the library of: Superior Sewing Machine & Supply LLC

Contents
Application · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · •· · • · 2
Notes on safety · · · · · · · · · · · · · · · · · · · · · · · · • · · · · · · · · · · · · · · · · · · · · · · · · · · · · 2
Commissioning · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 2
Oiling · · · · · · · · · · · · · · · · · ~ · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 2
Needle and thread · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 3
Inserting the needle · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 3
Winding fue bobbin · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 3
1breading the bobbin case · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 3
To remove the bobbin case · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 4
1breading fue machine · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 4
Regulating the needle thread tension · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 5
Regulating the pretension · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 5
Regulating the bobbin thread tension · •· · · · · · • · • · • · · · · · · · · · · · · · · · • · · • · · • · • 5
Regulating the take-up spring • · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 5
Regulating the presser foot pressure · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 5
Regulating the stitch length · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 6
(457A105/125/135/143/505/525/535/543)
Regulating the stitchlength (457A140) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · • • · 6
Selecting the needle position · · · · · · · · · · · · · · · · · · · · · · · · · · ·· · · · · · · · · · · · · · · · · 6
(457A105/125/135/140/505/525/535)
Setting the stitch width · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · • • • · 6
(457A105/125/135/140/505/525/535)
Setting the stitch width (457A 143/543) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 7
Regulating the amount of oil flow to sewing hook · · · · · · · · · · · · · · · · · · · · · · · · · · 7
Back tack switch · · · · · · · · ··· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 7
(457A505G/505F/525G/525F/535G/535F/543G543F)
Adjusting
fue slack needle thread regulator · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 8
(457A505E/505F/525E/525F/535E/535F/543E/543F)
Adjusting the bobbin thread holder · · · · · · · · · · · · •· · · · · · · · · · · · · · · · •· •· · · · · · 8
(457A505/525/535/543)
Adjusting
fue length of thread end in needle eye · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 8
(457A505/525/535/543)
Adjusting the needle tread holder puller · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · •• 8
(457A505E/505F/525E/525F/535E/535F/543E/543F)
Installing ilie belt guard · · · · ··· · · · · · •· · · · · • • • · · · · • • · •· · • · · · · · · · · · · · · · • • • 9
Specifications · · · · · · · · · · · · · · · · · · · • · · · · · · · • · • • · • · • • • · • · · · · · · · · · · · · · · • 9
Machine care · · · · · · • · · · · · · •• · · · · · · · · · • · · · · · · • · · •· · · · · · · •· · · • • • · · · · · • 9
From the library of: Superior Sewing Machine & Supply LLC

APPLICATION
High speed single needle lock stitch zigzag machine.
High speed single needle lock stitch zigzag machine with au-
tomatic thread trimmer.
NOTES ON SAFETY
The machine must only be commissioned in full knowledge of
the instruction manual andoperated bypersons with appropri-
ate training.
Before putting into service also read the safety notes and the
instruction manual
of the motor supplier.
The machine
must be used only for the purpose intended.
Use ofthe machine without the safetydevices belonging to it is
not permitted.
When gauge parts are exchanged (e.g. needle, presser foot,
needle plate, feed
dog and bobbin), duringthreading, when
the workplace is left, and during service work,
the machine
must
be isolated from the mains by switching off the main
switch or disconnecting the mains plug.
On mechanically operated clutch motors without start inhibi-
tor it is necessary to wait until the motor has stopped.
General servicing
work must be carried out only by appropri-
ately trained persons.
Repairs, conversion and special maintenance
work must only
be carriedout
by technicians or personswithappropriatetrain-
ing.
For service
or repair work on pneumatic systems the machine
must be isolated from the compressed air supply system. Ex-
ceptions to this are only adjustments and function checks
made
by appropriately trained technicians.
Work on the electrical equipment must be carried out only by
electricians
or appropriately trained persons.
Work on parts and systems under electric current is not per-
mitted, except as specified in regulartions EN50110.
Conversions or changes to the machine must be made only on
adherence
to all safety regulations.
For repairs, only replacement parts approved
by us
must be used.
Commissioning
of the sewing head is prohibited until such
time as the entire sewing
unit is found to comply with EC
regulations.
Meanings
ofthe symbols:
Danger spot!
Items requiring special attention
Danger of injury to operative or service staff
Be sure to observe and adhere to these
safety notes!
- 2 -
COMMISSIONING
To avoid disturbances or damages it is abso-
lutely necessary
to observe the following in-
structions:
Before
you put the machine into operation for the ftrst time
clean itthoroughly, and oil it well (see page 2 ).
Have the machine check whether the motor can be used with
existing mains voltage
or not, and that junction box is cor-
rectly connected.
Do not startthe machine if the voltage is not
correct!
When the machine runs, the balance wheel must rotate toward
the operator. If it dose not, have the electrician change the
wires on the motor.
OILING
HIGH
Fig.I
Fig.2
Switch
offthe machine.
Set sewing
head upright again using both
hand'S.
Danger of crushing between sewing head
and table top.
Tip machine back on its hinges and fill the oil reservoir to
HIGH mark as illustrated in Fig. 1.
Correct lubrication is indicated by a continuous stream of oil
passing the oil flow window A while machine is running, as
shown in Fig. 2.
Should this oil flow become erratic,
STOP the machine and
check the reservoir oil level, fill
if needed.
At least twice each month, check
the oil level in the
reservoir.
Never allow the oil level to drop below add oil
mark, shown in Fig. 1.
Only use oil with a viscosity o{20.0 mm
2/sec.
at 38 o C and a
density
of0.888 g/cm3 at 15 C. We recommend SINGER
C-oil.
From the library of: Superior Sewing Machine & Supply LLC

NEEDLE AND 11-IREAD
Size of needle should be detennined in accordance with the
size
ofthread used and type of material being sewn. A correct
sizeneedle will permit the thread
to pass freely through the eye
of th e needle and avoid strain and breaking. A bent needle
will cause your machine to skip stitches. A hook
or burr on
the needle point will result in a finish that looks blurred and
when short stitches are used some materials
may be cut.
Theref ore, to obtain best sewing results, use SINGER needles.
For li g ht -For medium-
Applica
ti on of class weight
wei g ht
,
materials mat er ials
Max.
t hr ead A Me
tri c No. 120-
10 0
lOO - 60
si ze- sy ntheti c Co
tton No. 80-
60
60- 30
]I S (S INGER ) #
8- J:HO #12-#16
N ee d le si ze
Me tri c 60-
70 80- 100
1906
-· 01
( 13 5X53)
1906-07
Catalog No. .(
Needl e system)
(1 35 'X 53 MBa ll )
87 52 -· 64
(1 35 X53 Lg E cc G L Ba ll )
.Aor an equivalent s ize of ot her type of thr e ad.
INSERTING THE NEEDLE (See Fig .3)
Fig.3
Switch off the machine.
Do not operate without finger guard
(2)! (See Fig. 3)
Danger of injury!
Use cat. No. 1906-01 (135 X 53), 1906-07 (135 X 53 M
Ball),
8752-64 (135 X 135 Lg G Ecc L Ball)'needles only.
(See table page.)
Set the needle
bar at its highest point. Loosen needle set
screw (1). (see Fig.
3) Insert the needle in the needle bar and
push it up as far as it will go. Make sure its long groove
faces toward the front. Tighten needle set screw (1) securely.
- 3 -
WINDING 11-IE BOBBIN (See Fig.4)
Fig.4
Bobbin winder spindle (1) rotates in
the direction of arrow
(A).
Push lever (2) inthe direction
of aiTow (B) to windthe bobbin.
To adjust amount of thread on bobbin, loosen set screw (3) in
lever (2) and move lever (2),
as required. Securelytighten set
sc
rew (3).
Adjust the thumb nut (
4) to regulate the tension for bobbin
winding.
If thread winds unevenly on bobbin, loosen screw (5) and
move bobbin winder pretension (6) up or down, as required,
and tighten screw (5).
THREADING 11-IE BOBBIN CASE
AB
2
Fig.6
Switch
off the machine.
Fig.5
A
B
Fig.?
Hold bobbin so that thread will unwind in the direction shown
in
Fig . 5 and place the bobbin into bobbin case.
Pull the thread into slot (1) and under
the tension spring (2)
and into slot (3) as shown in Fig. 6. Then draw thread into
delivery eye
(A or B), as shownin Fig. 6. Use delivery eye (A)
for sewing light weight material, as shown in Fig. 7.
Use delivery eye (B) for sewing medium weight material.
From the library of: Superior Sewing Machine & Supply LLC

TO REMOVE Tiffi BOBBIN CASE
Fig.8
Switch
off the machine.
Do not operate machine with throat plate
left open.
Open latch ( 1) and remove bobbin case from sewing hook.
(Fig. 8)
THREADING 1HE MACI-IINE
Fig.9
B
FiglO Fig.l1
- 4 -
457 A105/505B/505G
125/525B/525G
135/535B/535G
140
143/543B/543G
457 A105/505B/505G
125/525B/525G
13 5/ 53 5B/535G
140
143/543B/543G
D
457A 105
125
135
140
143
Fig.14
c
c
457A 505E/505F
D
525E/525F
535E/535F
543E/543F
Fig.16
Fig.l2
Fig.13
457A 505B/505G
525B/525G
535B/535G
5.43B/543G
Fig.l5
Switch
off the machine.
Do not operate machine
with the cover (2) (See
Fig. 9) left open.
From the library of: Superior Sewing Machine & Supply LLC

Check and make sure no thread is caught in the rotary take-
up before threading the machine.
CAUTION: Be careful not to injure
your fingers with the
thread cutter (1), Fig. 9, on the face plate when
threading the rotary take-up.
Pass the thread from
the unwinder through threading points
A(Fig. 10), B (Fig. 11), C (Figs. 12 and 13) and D (Figs. 14,
15
and 16) in the order sho\\-11.
NOTE: Whenpassing threadthrough threading point C (Figs.
12
and 13), wind thread around rotary ten.<.; ion wheel
(I) once.
REGULATING THE NEEDLE 11-IREAD
TENSION
Fig.l7
Regulate needle thread tension with tension regulating
thumb nut (1) as shown in Fig. 17.
REGULATING 1HE PRETENSION
Fig.18
Pretension thumb
nut (2) should be adjusted so that the
needle thread will.rotate the rotary tension wheel (1)
without slippage. (Fig. 18)
- 5 -
REGULATING THE BOBBIN THREAD
TENSION
Fig.l9
Regulate bobbin thread tension with tension regulating
screw (1)
as sho\\-11 in Fig. 19.
REGULATING THE TAKE-UP SPRING
3 Fig.20
Using a large screwdriver in slot
of stud (1 ), regulate take-up
spring tension
by turning stud (1), as required.
To adjust the amount of take-up spring movement, loosen
screw (2), Fig. 20, and
settake-up springheight byturning the
entire tension assembly (3) toward left
or right, as required.
Securely tighten screw (2).
REGULATING THE PRESSER FOOT
PRESSURE
Fig.21
To regulate the presser foot pressure, tum knurled thumb
screw (1), Fig. 21, toward left or right as required.
From the library of: Superior Sewing Machine & Supply LLC

REGULATING THE STITCH LENGTI-I
(457A 105/125/135/143/505/525/535/543)
Fig.22
To regulate stitch length for forward feed, turn stitch length
regulating screw stud (1), Fig. 22, clockwise to shorten the
stitch length and counterclockwise to lengthen the stitch
length.
To regulate stitch length for reverse feed, turn stitch length
regulating screw stud (2), Fig. 22, clockwise to shorten the
stitch length
and counterclockwise to lengthen the stitch
length.
To change the direction of feed for back tacking, depress feed
reverse lever (3) quickly to lowest position and hold lever (3)
inthis position until backtackis completed. The machinewill
return to forward feed when lever (3)
is released.
REGULATING Tiffi STITCH LENGTII
(457A140)
1 .
A B
Jill' ~
Fig.23
Switch
off the machine.
Set sewing head upright again using both
hands. Danger
of crushing between sewing
head and table top.
To regulate the stitch length, tip machine back on its hinges,
loosen lock nut (1) and turn rod (2), as required. (Fig. 23)
To make the stitch length longer, move rod (2) in the direc-
tion
of arrow (A).
To shortenthe stitch length, move rod (2) inthe direction
of
arrow (D).
SELECTING TIIE NEEDLE POSITION
(457A 105/125/135/140/505/525/535)
- 6 -
Fig.24
To select desired needle position, loosen thumb nut (1) and
move lever (2)to desired needle position& tighten thumbnut.
A ... Left needle position
B
.. . Center needle position
C ... Right needle position
SETTING THE STITCH WIDTII
(457A 105/125/135/140/505/525/535)
Fig.25
The width
of zigzag stitch is regulated with lever (1)~ Fig. 25.
457Al25/525 •••••••••••• ••• ••
0- 5mm
457
Al05/135/140/505/535 •••••• 0- 8mm
From the library of: Superior Sewing Machine & Supply LLC

SETTING 11-IE STITCH WIDTII
(457A 143/543)
Fig.26
To regulate the width of zigzag stitch, loosen thumb screw(1),
Fig. 26, and set lever (2) to desired setting.
REGULATING TilE AMC)UNT OF OIL FLOW
TO SEWING HOOK
Fig.27
Fig.28
- 7 -
Switch off the machine.
Set sewing head upright again using both
hands. Danger
of crushing between sew-
ing head and table top.
To regulate the amount of oil flow to sewing hook, tip ma-
chine back on its hinges and tum oil flow regulating valve (1)
as shown in Fig. 27.
To decrease the amount
of oil flow, tum valve clockwise.
To increase the amount
of oil flow, tum valve counterclock-
Wise.
NOTE: If oil supply to sewing hook is still not sufficient
even when oil flow regulating valve (1)
is adjusted
to maximum, loosen
nut (1), Fig. 28, and tum oil
flow regulating screw (2) in the direction
of arrow
(A).
(Oil flow regulating screw (2) is adjusted to ap-
proximately 7. 5nun when machine leaves the fac-
tory.)
BACK TACK SWITCH
( 457 A505G/505F/525G/525F/ 53 50 /535F/543G/543F)
( -== ============
Fig.29
Push back tack switch (1), Fig. 29, for backtacking. The ma-
chine will continue to sew in reverse while the back tack
switch is pushed.
From the library of: Superior Sewing Machine & Supply LLC

ADJUSTING THE SLACK NEEDLE THREAD
REGULATOR
(457A 505E/505F/525E/525F/535E/535F/543E/543F)
2
Fig.30
Switch
off the machine.
To adjust the slackness
ofthe needle thread, loosen wing bolt
(
1) and slide it up or down, as required, usingthe indicator (2)
and graduation as a yardstick as shown in Fig. 30.
Move wing bolt upward in the direction of arrow (A) to in-
crease slackness.
Move wing bolt downward
in the direction of arrow (B) to
decrease slackness.
NOTE: Excessive slackness ofthe needle thread may cause
birds nest and thread breakage at start
of sewing.
Insufficient slackness may result in needle thread
being pulled out
of needle eye, skip stitching and
needle breakage at start
of sewing.
When slack needle thread regulator function
is not
required, turn offswitch (3) shown in Fig. 30.
AD.nJSTING TilE BOBBIN THREAD
HOLDER
( 457 A 505/525/535/543)
Switch offthe machine.
Fig.
31
Set sewing head upright again using both
hands. Danger
of crushing between sewing
head and table top.
To adjust the length ofthread end remaining onthe underside
of the material at start of sewing, tip machine back on its
hinges and turn adjusting screw (1) as shown in Fig. 31.
- 8 -
To increase the length of thread end, turn adjustingscrew (1)
clockwise.
To decrease the length
of thread end, turn adjusting screw
(
1) counterclockwise.
ADJlJSTING THE LENGTII OF TIIR.EAD END
IN NEEDLE EYE
( 457 A 505/525/535/543)
... ...
A B
Fig.32
Switch off the
machine.
To adjustthe length
of threadend remaining in the needle eye,
loosen screw (1), Fig. 32, and move face plate thread puller
(2), as required.
To shortenthe thread end, move thread puller inthe direction
of arrow (A).
To lengthen the thread end, move thread puller in the direc-
tion of arrow (B).
ADnJSTING TilE NEEDLE TIIREAD HOLDER
PULLER
(457A 505E/505F /5 25E/525F/535E/53 5F/543E/543F)
1 &
2
Switch off
the
machine.
Fig.33
To adjust the holding strength
of needle thread holder puller,
loosen screws (1) and (2), Fig. 33, and adjust the pressure
of
the needle thread holder puller springs (3) and (4) againSt
needle thread holder puller.
From the library of: Superior Sewing Machine & Supply LLC

INSTALLING 11-IE BELT GUARD
I/ .. /
s (/ / .
\
\
1
Fig. 34
Switch off the machine.
Set sewing head upright again using both
hands. Danger
of crushing between sewing
head and table top.
Do not run machine without belt guard!
Danger
of inaccidents!
Above table surface
Fasten beltguards (1) and (2)to machine head with belt guard
screws (3) and (4) and also with nuts (5) as shown in Fig. 34.
Then fasten belt guard (6)
to table with wood screws (8) mak-
ing sure it will not interfere with belt guard (1) and (2),and so
that the V-belt will rest against the belt guard slide (7) when
machine is tipped back on its hinges.
When installing belt guard for machines with thread trimmer,
remove portion "A" from belt guard (2).
When installing belt guard for machines with touch back sys-
tem remove portion "A" and "B" from belt guard (1) and (2).
Below table surface
Install belt guard so that motor pulley and V-belt will rotate
freely without interference.
- 9 -
SPECIFICATIONS
Stitch type : see table page 10
Variety: see table page 10
Machine pully: 74mm effective dia. for V-belt
Needle catalog No. :see table page 10
Needle size : see table page 10
Fabric clearance:
105/125/135/140/ 143: 6.2mm
505/525/535/543 :
5. 7mm
Workspace width: 280mm
Workspace hight: 120mm
Bed dimensions : 477 X 178mm
Max.stitch length : see table page
10
Max.sewing speed: see table page 10
Subject to alterations in design and dimensions.
MACHINE CARE
Switch offthe machine.
Set sewing head upright again using both
hands. Danger
of crushing between sew-
ing head and table top.
When the machine
is in regular use, remove the lint and dust
from around sewing hook area once a day.
A machine
in frequent use should be cleaned and oiled more
frequently.
From the library of: Superior Sewing Machine & Supply LLC