ZOJE ZJ0303L-3-D3 Parts Manual

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
DIRECT DRIVE MEDIUM&HEAVY WEIGHT MATERIALS
SYNCHRONOUS BED SEWING MACHINE
PARTS BOOK

OPERATION INSTRUCTION

,,。
,,
 。
1. ,,。
2. ,。,。
3. ,、。
4. ,。,
,。
5. 。
6. ,。
7. ,:
71- ;
72- 、、、、 ;
73- ;
- 。74
8. ,、,
。
9. ,。
10. 、。
11. 。
12. ,
,。
13. 。
14. ,,,。
15. 。
. ,。16
。
17. 
18. 


INSTRUCTION MANUAL
To get the most out of the many functions of this machine and
operate it insafety 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 any-time 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 ready 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 personalprotection 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 receptacle.
7 1 For threading needle s and replacing bobbin-() .
-() ,,,,7 2 For replacing part s of needle presser foot throat plate feed dog Hook
assy .etc
7 3 For repair work-.
7 4 For 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 ar-eas and consult a medical doctor.
9 Tampering with the live parts and devices regardless of whether the machine is.,
powered is prohibited,.
.,10 Repairing remodeing 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 personnel.
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 your 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 for the nomal operation of the
machine The machine has to be operated in an enviorment 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 grounded receptacle,.
.16 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 remodeing or modification of the machine.
17 The machine is only allowed to be used for the ppose intended Other used are..
not allowed.
..18 Warning hints are marked with the two shown symbols
Danger of injury to operator or service staff
Items requiring special attention

1. ,,。
1. ,、,。
2. ,、

3. ,,
4. ,,
5. ,,,
。
6. ,,。
7. ,
。
8. ,,; 
,。
9. ,,
。
FOR SAFE OPERATION
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 devices removed,.
2 To prevent possible personal injuries caused by being caught in the.
machine Keep your fingers head and clothes away from the handwheel., ,
cover and the motor while themachine is in 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 hook 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 hook during operation In addition be sure to turn OFF the.,
power to the machine when replacing the bobbin.
6 To avoid possible personal injuries be careful not to allow your fingers in.,
the machine 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 tiling the machine head.
8 If your machine is equipped with a serve 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 prevent possible accidents because of electric shock or damaged.
electrical component s turn OFF the power switch in prior to the connection(),
disconnection of the power plug/.
Operation Instruction


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Brief Introduction

Main Techanical Specifications

Mounting The Machine
Lubrication
Oil mass Adjustment of Rotating Hook
Mounting the Needle
Mounting the Bobbin
Threading the Needle Thread
Winding up the Bobbin Thread
Adjusting the Stitch Length
Mounting the Thread Stand
Adjusting the Knee Lifting Height
Adjusting the Take-up Spring
Adjusting the Tension of Stitch Thread
Sewing and backtacking
Adjusting the Take-up Amount of Take-up Lever









  




1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CONTENTS

-1-
3
3
4
4
5
7
8
8
8
10
10
11
11
12
13
13
14
Adjusting the Presser foot Pressure

…………………………………………
…………………………………………………………………
……………………………………………………………………
………………………………
……………………………
………………………………………………………
……………………………………………………………
…………………………………………
Adjusting the Manual Foot Lifting Height
Height of the feed dog
To tilt the feed dog
Adjusting the timing of needle and feed mechanism
Adjusting the Positions of Needle and Rotating Hook
Adjusting the difference of stitch length between the forward and backtacking
Adjusting the tension release
Adjusting the oil pump
  
 






18
19
20
21
22
23
24
25
26
-2-
15
14
16
15
17
18
18
18
19
Adjusting the lifting amount if presser feet

…………………………………………………
27 20
Adjusting the trimming mechanism

…………………………………
28 23
Adjusting the trailing length after thread trimming


 ,,
,301
,,,
,:,。
、、,
This machine is designed with link type feed mechanism and link lever thread
take up mechanism and full lubrication by pump.
-
It s suitable for sewing leather , canvas and other heavy weight materials; such
as suitcase, car seat, tent, sofa, etc.
It s reliable and accurate on such functions as thread trimming, needle positio
-ning, etc.
Brief introduction
1

2300/
8mm
8mm()
37mm
3.5-5.5mm





Main Techanical Specifications
2




16mm( )

Specification
Medium & heavy weight
materials
2300s.p.m
8mm
8mm Max()
37mm
Automatic lubrication
750W
Application
Max sewing
speed
Max stitch
length
Presser foot
lift height
Needle bar
stroke
Lubrication
Motor power
Hand lifter
Knee lifter
Hook
Parmeter
16mm Max()
Large lubrication hook
750W

Dp 17 18×#

3.5-5.5mm
Lifting amount
if presser feet
Dp 17 18×#
Needle
-3-
 ( )1234
 ( ) 5
Mounting the Machine (Fig.1, Fig. 2, Fig.3 and Fig. 4)
Lubrication (Fig.5)
3
4
1.
1
2①②A
()
②()B
②
)⑤,3
④
。
1Fig.1
2Fig.2 AB
3Fig.3
4Fig.4
1.Fixing oil tray
1) Put the oil tray on the four groove co
-rners on the sewing table.
2 Fix two arm cushion to the A side of)①
oil tray facing the operator Fix the two②( ).
stand bases to the B side of oil tray hin③②(
-ge side then fix the oil tray),.
3) Insert machine head coupling hook
into the pin holes in the bottom plate such th
-at it is embedded into the coupling sehook
-at , and put the machine head onto the se
-ating washer on four corners of the oil tray.
1.
1①()10
” HA
 ,。2LB″″
1.Information on lubrication
1) Fill oil pan with sewing machine oil
() .10 while oil up to H mark A
2 When the oil level lowers below L mark)
B refill the oil pan with the specified oil,.
②①
-4-
,,3
②,。
)4
。
3 When you operate the machine after lubri)
-cation you will see splashing oil through oil,
sight window if the lubrication is adequate.
4 Note that the amount of the splash oil is u)
-nrelated to the amount of the lubricating oil.
5Fig.5
A
B
:
1. ,
。
Caution:
1.To prevent the unexpected startup
of sewing machine, trim off the pow
er supply before the operation is co
-nducted.
()678
Oil mass Adjustment of Rotating Hook (Fig. 6, Fig. 7, Fig. 8)
5
1.
1①
:
+ ,A
- ,。B
230
,
:
1. ,
。
1.Adjustment method
1) Adjust the oil mass of rotating hook usi
-ng adjusting screw :Turning the adjusting
screw of the front shaft sleeve on bottom sh
-aft towards direction A the oil amount wi+,
-ll increase and towards direction B the,-,
oil amount will decrease.
2)When adjustment of oil mass is over, all
-ow the sewing machine to idle for about 30
seconds to confirm the state of oil mass.
Caution:
1.To prevent the unexpected startup
of sewing machine, trim off the pow
er supply before the operation is co
-nducted.
-5-
6Fig.6
A
B
2.
,1
()
2
( )8
 35
:
1.,
”“MAX “MIN
2.。 
,,
。 70mm
25mm
310mm-

Oil mass
paper
Oil tray

Bottom plate

Hook

Special oil mass confirmation paper

Position for oil mass confirmation
7Fig.7
8Fig.8
1.Confirming the Oil Mass
1) To cool down the machine head, allow it
idle for about 3 minutes (appropriate discon
-tinuous running).
2) Insert the special oil mass confirmation
paper when the sewing machine is rotating (
detailed operations are described in Fig. 8).
3) Oil mass confirmation time lasts for 5 sec
-onds.
Caution:
1.Prior to the above-mentioned opera
-tion,Make sure the oil height in the oil
.plate ranges between MAX and MIN
2. Rotating hook works at high spe
-ed. To prevent human injury, the o
-perator shall keep his fingers away
from the rotating hook during oil
mass adjustment.
2mm

Splashed oil trace
MIN

MAX

Splashed oil trace
5mm
3.
) ,1(8)
。,。
23 。
-6-
3.Guide sample of oil mass adequacy
1)The guide sample shown in the right-hand figure (see Fig. 8) may be finely adjusted (in
-creased or reduced) as per different sewing processes; however, excessive increase or re
-duction shall be avoided. Too little oil mass may lead to rotating hook heating, and overmu
-ch oil mass may lead to contamination of the sewing materials.
2 oil mass confirmation pape)Test the oil mass 3 times using special r till the oil traces in
-dicated by the special paper show no changes.
( )9
Mounting the Needle (Fig.9)
6
1.
 2. ②
 AB
3.,
 。
4. ②
 5. CD
:
1. ,
。
2.
。
1.Turn the upper wheel to allow the needle
to reach its maximum height.
2. , hold nUnscrew needle carrying screw
-eedle by hand, and align the indentation A
of needle to right direction B.
3.Insert the needle into the bottom of needl
-e hole in direction of arrow till it reaches the e
-nd point.
Screw down the needle carrying screw4. .
5.Take care to ensure that the elongated sl
-ot C on the needle is aligned to the left directi
-on D.
Caution:
1.To prevent the unexpected startup
of sewing machine, trim off the pow
-er supply before the operation is co
-nducted.
2.Needles are available in different
sizes. Please select appropriate ne
-edle as per the thickness of threads
and the sewing materials.
A
B
C
10 Fig.109Fig.9
A
B
C
D
-7-
( )10
Mounting the Bobbin (Fig. 10)
7
1.
, 2. AC
,B
 。3., 
1.Hold the rotating hook by hand, and fit t
-he bobbin into the rotating hook.
2.Thread the thread through the thread gr
-oove in the rotating hook, and draw out the
thread in direction C. In this way, the thread
is led out of hole B through the tension spring.
3.When bobbin thread is drawn, the bobbi
-n shall turn clockwise in direction of arrow.
( )11
Threading the Needle Thread (Fig. 11)
8
, 。 
Thread the needle thread when needle bar stays in its highest position, lead out the thre
-ad end from the thread stand, and conduct threading as per the serial numbers indicated in
the figure.
11 Fig.11
 ( ) 12 13
Winding up the Bobbin Thread (Fig. 12, Fig. 13)
9
1.
1)①。
),2
 
)3A
1.Bobbin thread winding-up method
1) Fit bobbin ①②onto spool .
2)Thread the right-hand thread coiling on
thread stand as shown in right-hand figure,a
-nd reel the thread end rightwards onto the b
-obbin for several turns.
Push winding lever3 over to direction)
-8-
11
12
13
11
12
13
A
B
。① ,①。C
③B

①,④。4
A, and run the sewing machine. Bobbin is
rotated in direction C, and thread is reeled o
-nto bobbin . Once the reel is full, winding
lever is pushed toward direction B, and wi
-nding is over.
4 , and trim off the thre)Remove bobbin
-ad using winding trimmer .
:
1.,
①③
。
2.①,
①
。
Caution:
1.To reel the bobbin thread, set the
bobbin thread to between bobbin
and thread gripper plate in taking
-up mode, and start thread winding.
2.To reel bobbin thread onto bobbin
when no sewing is performed, dra
-w the needle thread out of hole in th
-e take-up lever, remove bobbin o
-ut of rotating hook.
13 Fig.1312 Fig.12
C
D
E
2.
1,⑤
③AB
⑤AB
,⑥2
,,
.①a
 。
., bD
,, E
。
1. the bAdjusting obbin thread winding
1)To adjust the winding capacity of bobbin
thread, unscrew fixing screw , set winding
lever in direction A or direction B, and fix s
-crew again. Direction A is intendedfor re
-duction, and direction B is intended for incre
-ase.
2)If thread cannot be wound onto the bob
-bin flatly, unscrew nut , turn the winding te
-nsion disco, and adjust the height of height
of thread gripper plate .
a.The standard position is reached onc
-e the center heights of rotating hook and
thread gripper plate are identical.
-9-
.c

,3
⑧。
b.If the winding amount on the lower pa
-rt is bigger, move the winding tension disco
in direction D indicated in the right-hand figu
-re. If the winding amount on upper part is bi
-gger, move the winding tension disco in dire
-ction E indicated in the right-hand figure.
c.When the winding tension disco reach
-es its suitable position, screw down fixing s
-crew .
3)Adjust the winding tension of bobbin thr
-ead by turning thread tension nut .
( )14
Adjusting the Stitch Length (Fig. 14)
10
( ) 15
Mounting the Thread Stand (Fig.15)
11
1. , 

2. 。
,3.
③ ,B

1. ,turn the stitchWhile press the stopper
length dial to make the number on the d
-ial align with the mark on the stopper .
The number is the stitch length in mm.
2.The larger the number. The longer the stitc
-h length will be.
3.When turn the dial from a larger setting to,
a smaller setting. It will be easy to turn if the re
-verse feed lever in direction B, and turn the
feeding distance knob.
14 Fig.14 15 Fig.15
B
1.
。
2.
1.As shown in right-hand figure, mount the
thread stand component onto the mounting h
-ole for thread stand on the sewing machine t
-able.
2. for lower seScrew down retaining nut
-gment of thread stand lever to fix the thread
stand.
-10-
()16 17
Adjusting the Knee Lifting Height (Fig.16, Fig. 17)
12
1 13mm.。
2.①
16
1.Standard knee lifting height is 13mm.
2. may be usKnee-lifting adjusting screw
-ed to adjust the lifting amount of presser foot
, and the maximum lifting amount may reach
16mm.
:
1. ,
。
2. 16mm ,
, ②③
Caution:
1.To prevent the unexpected startup
of sewing machine, trim off the pow
-er supply before the operation is co
-nducted.
2.When the presser foot lifting exce
-eds 16mm, do not run the sewing m
achine because needle bar may c
-ollide with presser foot .
17 Fig.1716 Fig.16
()1819
Adjusting the Take-up Spring (Fig.18, Fig. 19)
13
1. 
1⑤③(
), A
(),B

. 2
1⑤()②,。
2④⑤
3③ ⑤ (
A), 
B(),。
1.Adjusting the oscillating quantity of take-up
spring
1) The oscillating quantity of take-up spring
is increased if screw ③⑤in tension disco
is turned clockwise (namely in direction A), an
-d it is reduced if the screw is turned counte
-r clockwise (namely in direction B).
2.Adjusting the tension of take-up spring
1 , and take out tension)Unscrew screw
disco (assembly).
Unscrew screw2 in tension disco .)④⑤
The tension of take-up spring is increa3)
sed if screw ③⑤in tension disco is turned clo
ckwise (namely in direction A), and it is red
uced if the screw is turned counterclockwise (
namely in direction B).
-11-
4⑤( ④
)②
. 3
1
B 
 B,
4) Screw down screw when adjustment is
over, fit tension disco (assembly) into the m
-achine, and screw down screw .
3.Judgment basis for adjustment adequacy of
take-up spring
1)Confirm that the tension of take-up sprin
-g is properly adjusted, draw out the needle
thread in direction B. If place B of needle threa
-d is drawn before take-up spring reaches it
-s lowest position, reduce the tension of take
-up spring .
:
1. ,
。
2. ,

 。
Caution:
1.To prevent the unexpected startup
of sewing machine, trim off the pow
-er supply before the operation is co
-nducted.
2.The take-up spring is already adju
-sted properly before the machine le
-aves the factory as a rule, and it req
-uires readjustment only for sewing
of special materials or usage of spe
-cial stitch threads.
19 Fig.1918 Fig.18
B AB A
,
B
The tension of take-up spring
is too high, so needle thread is
drawn out of place B in proces
-s of the action.

The take-up spring kee
-ps on functioning till the
end.
 ( 20)
Adjusting the Tension of Stitch Thread (Fig.20)
14
A
B
1. 
1
(), A
(),。B
.2
1C ②()
  (, D
-1.Adjusting the tension of needle thread
1) The tension of needle thread is increase
-d if the adjusting nut
in tension disco is tur
-ned clockwise (namely in direction A), and it
is reduced if the nut is turned counterclockwi
-se (namely in direction B).
2.Adjusting the tension of bobbin thread
1)The tension of bobbin thread is increase
-d if the adjusting screw is turned clockwis
-e (namely in direction A), and it is reduced if t
-12-
A
B
C
D
), 。
-he is turned counterclockwise (namelyscrew
in direction B).
:
1. ,
。
Caution:
1.To prevent the unexpected startup
of sewing machine, trim off the pow
-er supply before the operation is co
-nducted.
20 Fig.20 21 Fig.21
(21)
Sewing and backtacking (Fig.21)
15
1. 。
,2. ,
①,
,。
1. the power on.Turn
2.Depress the treadle to start sewing, when
the reverse lever is pressed or the backtac-
ing button is on during sewing, the feed will
be reversed. After release, the feed will recov-
er to normal.
(22)
Adjusting the Take-up Amount of Take-up Lever (Fig.22)
16
1C.
。
 2., ① ②
()  ,A
①
., ① ②3 
()  ,B
①
1.The standard position is obtained when g
-raduation line C on right thread hook is align
-ed to screw center.
2.For thick material sewing, unscrew screw
①②and move right thread hook to the left (na
-mely in direction A) to increase the take-up a
-mount, and screw down screw when adjus
-tment is over.
3 For thin material sewing, unscrew screw.
①②and move right thread hook to the right (
namely in direction B) to reduce the take-up a
-mount, and screw down screw when adjus
-tment is over.
-13-
22 Fig.22
:
1. ,
。
Caution:
1.To prevent the unexpected startup
of sewing machine, trim off the pow
er supply before the operation is co
-nducted.
C
AB
(24)
Adjusting the Manual Foot Lifting Height (Fig.24)
18
1.   ,
① ,
(
,)8mm
2.①
1.Turn clockwise the presser foot lever to up
-lift the presser foot, unscrew tightening screw
of presser bar spring bracket, moving upwa
-rd/downward pressure bar to adjust the ma
-nual foot lifting height (presser foot height ind
-icates the distance from the surface of needle
plate to the bottom surface of presser foot, and
23 Fig.23
B
A
(23)
Adjusting the Presser Foot Pressure (Fig.23)
17
1. 
 ②,2. 
 ⑤。
 
.3
.4
.④5
④

.6
1. .Loosen the lock nut
2.Turn the adjusting screw to adjust the
pressure of presser foot, if s not enough, plit'
-ease turn the screw to increase the press
-ure. The pressure should be as week as pos
-sible, but strong enough so that the material
doesn'.t slip
3.Tighten the nut .
4.Loosen the nut .
5.Turn the screw clock wise to increase
the pressure, on the contrary, turn the screw
counterclockwise to decrease the pressure.
6.Tighten the nut .
-14-
A
CD
/