JUKI MO-644DN Manuale utente
MO-644DN/654DEN
2-Needle, 2/3/4-Thread Overlock Sewing Machine
INSTRUCTION MANUAL
EN
IMPORTANT:
Read all safety regulations carefully and under-
stand them before using your sewing machine.
Retain this instruction manual for future reference.
MO-644DN
MO-654DEN
“IMPORTANT SAFETY INSTRUCTIONS”
When using an electrical appliance, basic safety precautions should always be followed, including
the following: Read all instructions before using this sewing machine.
“DANGER ____ To reduce the risk of electric shock:”
1. The appliance should never be left unattended when plugged in.
2.
Always unplug this appliance from the electric outlet immediately after using and before cleaning.
“WARNING ____ To reduce the risk of burns, re, electric shock, or injury to persons:”
1. Do not use the appliance as a toy. Caution is advised when the appliance is used by children, or
near children. This sewing machine can be used by children aged from 8 years and above and
persons with reduced physical, sensory or mental capabilities or lack of experience and knowl-
edge if they have been given supervision or instruction concerning use of the sewing machine
in a safe way and understand the hazards involved. Children shall not play with the sewing
machine. Cleaning and user maintenance shall not be made by children without supervision.
2. Use this appliance only for its intended use as described in this manual. Use only attachments
recommended by the manufacturer as contained in this manual.
3. Never operate this appliance if it has a damaged cord or plug, if it is not working properly, if it
has been dropped or damaged, or dropped into water. Return the appliance to the nearest au-
thorized dealer or service center for examination, repair, electrical or mechanical adjustment.
4. Never operate the appliance with any air openings blocked. Keep ventilation openings of the
sewing machine and foot control free from the accumulation of lint, dust, and loose cloth.
5.
Keep ngers away from all moving parts. Special care is required around the sewing machine needle.
6. Always use the proper stitch plate. The wrong plate can cause the needle to break.
7. Do not use bent needles.
8. Do not pull or push fabric while stitching. It may deect the needle causing it to break.
9. Do not carry out sewing with a marking pin stuck in the material since doing so can cause knife/
needle breakage. In addition, do not attempt to cut anything other than fabric and thread with
the upper/lower knives.
10. Switch the sewing machine o “O” when making any adjustments in the needle area, such as
threading needle, changing needle, threading looper, or changing presser foot and the like.
11. Always unplug the machine from the electrical outlet when removing covers, when covers are
opened to thread the loopers, when lubricating or when making any other user servicing adjust-
ments mentioned in the instruction manual.
12. Never drop or insert any object into any opening.
13. Do not use outdoors.
14.
Do not operate where aerosol (spray) products are being used or where oxygen is being administered.
15. To disconnect, turn all controls to the o “O” position, then remove plug from outlet.
16. Do not unplug by pulling on cord. To unplug, grasp the plug, not the cord.
17. Basically, the machine should be disconnected from the electricity supply when not in use.
18. If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or sim-
ilarly qualied persons in order to avoid a hazard.
19. (Except USA/Canada) This machine is provided with double insulation.
Use only identical replacement parts. See instructions for servicing Double-Insulated machine.
“SERVICING DOUBLE-INSULATED PRODUCTS
(Except USA / Canada)”
In a double-insulated product, two systems of insulation are provided instead of grounding. No
grounding means is provided on a double-insulated product nor should a means for grounding be
added to the product. Servicing a double-insulated product requires extreme care and knowledge
of the system and should only be done by qualied service personnel. Replacement parts for a
double-insulated product must be identical to those parts in the product. A double-insulated product
is marked with the words DOUBLE INSULATION or DOUBLE INSULATED.
The symbol may also be marked on the product.
“SAVE THESE INSTRUCTIONS”
“This overlock sewing machine is intended for household use only.”
1
Danger warning
which is not speci-
ed
There is a risk of
electrical shock
There is a risk
of re
There is a risk of
injury to hands,
etc.
Prohibited matter
which is not speci-
ed
Disassembly/
alteration is pro-
hibited
Do not place
ngers under
the needle
Do not pour oil,
etc.
Generally required
behavior
Disconnect the
power plug
Congratulations on your purchase of a JUKI sewing machine.
Please be sure to read safety precautions in “To use the sewing machine safely” in the Instruction
Manual before use to fully understand the functions and operating procedures of the sewing
machine so as to use the sewing machine for a long time.
After you have read the Instruction Manual, please be sure to keep it together with the warranty so
that you can read it whenever necessary.
To use the sewing machine safely
Marks and pictographs included in the Instruction Manual and shown on the sewing machine are
used so as to ensure safe operation of the sewing machine and to prevent possible risk of injury to
the user and other people.
Warning marks are used for dierent purposes as described below.
WARNING Indicates that there is a possible risk of death or serious injury if this mark is ignored and the sewing machine
is used in a wrong manner.
CAUTION
Indicates the operation, etc. which can cause a possible risk of personal injury and/or physical damage if this mark
is ignored and the sewing machine is used in a wrong manner.
Pictographs mean the following:
2
● Do not wipe the sewing machine with solvent
such as thinner.
When the sewing
machine is soiled, put a
small quantity of neutral
detergent on a piece of
soft cloth and carefully
wipe o the sewing
machine with it.
● Be sure to use the sewing machine in the
temperature range from 5ºC to 40ºC.
If the temperature is excessively low, the
machine can fail to operate normally.
WARNING
For the combination of the material and the thread and needle, in particular, refer to the explanation
table in “Replacement of the needle”.
If the needle or thread does not match the material used such as in the case that an extra heavy-
weight material (e.g., denim) is sewn with a thin needle (#11 or higher), the needle can break result-
ing in an unexpected personal injury.
Other precautions
● Do not put the sewing machine under the
direct sunlight or in a humid place.
Be aware that the following state can take place since the sewing machine incorporates semi-con-
ductor electronic parts and precise electronic circuits.
* The operating temperature of the sewing machine is between 5ºC and 40ºC. Do not use the
sewing machine under the direct sunlight, near the burning things such as a stove and candle, or
in a humid place. By so doing, the temperature in the interior portion of the sewing machine can
rise or the coating of the power cord can melt, causing re or electrical shock.
LED light
・
Rated Voltage: 9V
・
Maximum power consumption: 1.3W
3
Safety instructions ·····································1-3
Contents···················································· 4
Details of the machine································ 5,6
• Accessories············································· 6
Assembling thread stand ····························7-8
Preparing the machine ································· 9
• Attaching the foot controller ························ 9
• On/O of the power/light switch ··················· 9
Operation and function
• Handwheel (Pulley)··································10
• Opening and closing the looper cover ··········10
• Opening and closing the cloth plate ·············10
• Presser foot lifter ····································· 11
• Changing the presser foot ························· 11
• Raising the upper knife ·····························12
• Lower knife adjusting knob ························12
• Stitch length adjusting knob ·······················13
• Dierential feed adjusting knob···················13
• Overlocking width selection knob ················14
• Presser foot pressure adjusting screw··········14
• Changing the needles·······························15
Threading
• Preparation ············································16
• 1. Upper looper thread (Blue) ····················17
• 2. Lower looper thread (Red) ················ 18-19
• 3. Right-hand needle thread (Green) ···········20
• 4. Left-hand needle thread (Yellow) ·············21
3-thread overlocking
• 4 mm wide 3-thread Overlocking·················22
• 6 mm wide 3-thread Overlocking·················22
Contents
2/3-thread converter
• How to use the 2/3 thread converter ············23
Trial sewing
• After threading, make a trial sewing ·············24
Thread tension dial ··························· 24
Adjusting the thread tension·············· 25
Roll hemming
• Roll hemmer···········································26
• Preparation for roll hemming ······················26
•
Standard thread tension list for roll hemming
···26
Sewing in tape ································· 27
Dierential feed (MO-654DEN)
• Dierential feed·······································28
Gathering (MO-654DEN)
• Gathering···············································29
• Unpicking seams ·····································29
Thread breakage during sewing ········· 30
Securing seams ······························· 30
Maintenance
• Changing the upper knife ··························31
• Changing the lower knife···························31
• Cleaning and lubricating····························31
• Before you call for help: Trouble and corrective
measures ··············································32
Specications ·································· 33
Optional Accessories ························ 34
4
View with looper cover open
Details of the machine
Details of the machine
Looper cover opening handle
Looper cover
Cloth plate
Chip guard cover
Throat plate
Presser foot
Presser foot lifter
LED light
Thread take-up cover
Thread guide plate
Presser foot adjusting screw
Retractable support rod
Thread guide
Open thread guide
Presser foot lifter
Left-hand needle thread tension dial
Right-hand needle thread tension dial
Spool holder pin
Anti-vibration cone
Spool holders
Stitch length adjusting knob (MO-654DEN)
Differential feed adjustting knob (MO-
654DEN)
Machine socket
Handwheel (pulley)
Power/light switch
Lower looper thread tension dial
Upper looper thread tension dial
CAUTION :
Be sure to turn off the power switch before
opening the looper cover.
5
Upper looper
Lower knife
Lower looper
Lower knife setscrew
Lower looper threader (MO-654DEN)
Overlock width selection knob
Upper knife
Accessories
View with cloth plate open
Details of the machine
Foot controller Needle in the needle box
Small screwdriver
Large screwdriver (MO-654DEN)
Oiler
Accessory bag
Dust cover
Looper threader (MO-644DN)
Lower knife (MO-654DEN)
2/3 thread converter
(MO-654DEN)
Nets
Spool caps
Tweezers
Cleaning brush
Needle threader (MO-654DEN)
6
Lower knife adjusting knob
Stitch length adjusting knob (MO-644DN)
Differential feed adjusting knob (MO-644DN)
Assembling thread stand
Raise the support rod fully
Turn the thread stand until it engages the positioning stopper (A)
with a click.
Put the thread guide on the support rod
Insert the thread guide into the tip of the support rod so that the ar-
row in the thread guide comes in front of you.
Attaching the spool holders
Attaching the separately packed spool holder (equipped with two
spool holders) to the fixed spool holder.
A
7
Assembling thread stand
For overlock spools
For large spools
For spools of large inside diameter, position the anti-vibration come
upside down.
For small house-use spools
When using house-use spools, remove the anti-vibration cones.
Place a spool on the spoolholder with its notch downward and push
the spool caps on with the rounded outside edge at the bottom.
Notch
8
Preparing machine
1
2
3
A
B
C
Attaching the foot controller
1. Plug foot controller into machine socket.
2. Plug foot controller into power supply socket.
3. Lay your foot on the foot controller.
Step on the foot controller strongly (deeply), and the sewing
speed increases.
Step on the foot controller lightly (shallowly), and the sewing
speed decreases.
On/O of the power/light switch
A Pressing turns the power switch off.
B Pressing turns the power switch on, and sewing operation is per-
formable. The sewing light remains off.
C Pressing turns on both the power switch and sewing light.
MO-654DEN
MO-644DN
On/O of the power/light switch
The power/light switch is conveniently placed on the handwheel side
of the machine in front of the socket.
= Off
= On with light
CAUTION :
Perform these following steps when you are not using your
sewing machine:
1. Be sure to turn OFF the power switch.
2. Be sure to remove the power plug from the wall outlet.
3. Do not place a thing on the foot controller.
CAUTION :
Perform these following steps when you are not using your
sewing machine.
1. Turn the power/light switch off. (Press side).
2. Be sure to remove the power plug from the wall outlet.
3. Do not place a thing on the foot controller.
CAUTION :
Be sure to turn OFF the power switch before plugging/un-
plugging the controller.
9
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