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JUKI MO-644 User Manual

JUKI MO-644
42 pages
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IMPORTANT:
Avant de mettre la machine en ma rche, lire
attentivement et assimiler les regles de securite
de ce manuel.
Conserver le manuel afin de pouvoir le consulter
ul terieurement.
Manuel d’instructions
MO-644/654
2-Needle, 2/3/4-Thread Overlock Sewing Machine
2-naalds, 2/3/4-draads Overlock machine
Überwendlich-Nähmaschine Mit 2 Nadeln, 2/3/4 Fäden
Instruction Manual
Gebruiksaanwijzing
Bedienungsanleitung
BELANGRIJK:
Lees alle veiligheidsvoorschriften zorgvuldig door
en zorg ervoor dat u deze begrijpt voordat u deze
naaimachine gaat gebruiken.
Bewaar deze instructies voor later gebruik.
WICHTIG:
Alle sicherheitsvorschriften vor gebrauch der
nähmaschine sorgfältig durchlesen.
Bewahren Sie diese bedienungsan leitung r
weitere bezüge auf.
IMPORTANT:
Read all safety regulations carefully and under-
stand them before using your sewing machine.
Retain this instruction manual for future reference.
®
Surjeteuse-Raseuse 2 Aiguilles, 2/3/4 Fils
MO-644
MO-654
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JUKI MO-644 Specifications

General IconGeneral
TypeOverlock
Number of Threads4
Stitch Length1 - 4 mm
Maximum Sewing Speed1, 500 stitches per minute
Differential Feed Ratio0.7 - 2.0
Presser Foot Lift5 mm
Stitch TypeOverlock

Summary

Important Safety Instructions

Danger

Critical warnings regarding immediate hazards like electric shock, fire, or severe injury.

Warning

General safety precautions for operation, use by children, and handling of the appliance.

Servicing Double-Insulated Products

Guidelines for safely maintaining double-insulated appliances, emphasizing qualified personnel.

Save These Instructions

Instruction to retain the manual for future reference, indicating its ongoing importance.

Details of the Machine

View with Looper Cover Open

Illustrates the machine's components and threading paths when the looper cover is accessed.

View with Cloth Plate Open

Shows machine parts and access points when the cloth plate is removed for maintenance or adjustment.

Accessories

Assembling Thread Stand

Raise the Support Rod Fully

Instructions for extending the thread stand rod to its maximum height before use.

Attaching the Spool Holders

Guidance on connecting the spool holders to the main thread stand unit.

Preparing Machine

Attaching the Foot Controller

Steps for connecting the foot controller to the machine and power outlet for operation.

On/Off of the Power/Light Switch

Explanation of the machine's power switch functions and how to turn it on/off with or without light.

Operation and Function

Handwheel (Pulley)

Describes the function and direction of the handwheel for manual operation and needle positioning.

Opening and Closing the Looper Cover

Instructions for accessing the looper mechanism for threading and maintenance.

Opening and Closing the Cloth Plate

Guidance on how to open and close the cloth plate for fabric access and adjustments.

Presser Foot Lifter

Details on how to raise the presser foot to different heights for fabric placement and removal.

Changing the Presser Foot

Step-by-step instructions on how to safely remove and attach different presser feet.

Raising the Upper Knife

Procedure for lifting the upper knife, essential for certain operations like threading.

Lower Knife Adjusting Knob

How to adjust the lower knife position to control stitch width and prevent fabric issues.

Stitch Length Adjusting Knob

Instructions for setting the stitch length for various fabric types and desired results.

Differential Feed Adjusting Knob

Guidance on adjusting differential feed to prevent fabric puckering or stretching during sewing.

Overlocking Width Selection Knob

How to select the overlock stitch width for different seam finishes and roll hemming.

Presser Foot Pressure Adjusting Screw

Instructions for adjusting the presser foot pressure for different fabric weights.

Changing the Needles

Detailed steps for safely replacing sewing machine needles, including correct insertion.

Threading

Preparation

Initial steps required before starting the thread guide setup and machine threading process.

Threading Sequence

The correct order of threading each thread path for optimal stitch formation.

Thread the Tension Dials

How to correctly guide threads through the tension discs for proper tension control.

Needle Threader

Instructions for using the accessory needle threader to simplify needle threading.

1. Upper Looper Thread (Blue)

Step-by-step guide for threading the upper looper with blue thread, including spool placement.

2. Lower Looper Thread (Red)

Detailed instructions for threading the lower looper with red thread, including specific steps for MO-654.

3. Right-hand Needle Thread (Green)

Threading guide for the right-hand needle using green thread, covering all path points.

4. Left-hand Needle Thread (Yellow)

Threading instructions for the left-hand needle with yellow thread, including final steps.

3-Thread Overlocking

4 mm Wide 3-Thread Overlocking

Specific threading and setup for 4mm wide 3-thread overlock seams using the right-hand needle.

6 mm Wide 3-Thread Overlocking

Threading and setup instructions for 6mm wide 3-thread overlock seams using the left-hand needle.

2/3-Thread Converter

How to Use the 2/3 Thread Converter

Instructions for attaching and using the 2/3 thread converter for special stitch types.

Trial Sewing

After Threading, Make a Trial Sewing

Essential steps for performing a test stitch to check tension and seam quality before actual sewing.

Thread Tension Dial

Adjusting the Thread Tension

Guidance on setting thread tension dials for different threads and fabrics to achieve proper stitches.

Roll Hemming

Roll Hemmer

Explanation of the built-in roll hemmer feature for creating fine, narrow edge finishes.

Preparation for Roll Hemming

Steps required to prepare the machine for performing roll hemming stitches.

Standard Thread Tension List for Roll Hemming

Recommended thread tension settings for roll hemming and narrow overlock stitches based on fabric and thread type.

Sewing in Tape

Sewing in Tape

How to use the tape guide on the presser foot to reinforce seams on stretchy fabrics.

Differential Feed

Differential Feed

Explains how differential feed prevents fabric puckering or stretching, with adjustment guidelines.

Gathering

Gathering

Instructions for using differential feed to gather or create ruffles on fabric edges.

Unpicking Seams

Method for safely removing overlock stitches by cutting threads and pulling them loose.

Thread Breakage During Sewing

Thread Breakage During Sewing

Troubleshooting steps to take when threads break during the sewing process, including re-threading.

Securing Seams

Securing Seams

Techniques for reinforcing the beginning and end of seams to prevent unraveling.

Maintenance

Changing the Upper Knife

Procedure for replacing the upper knife blade, typically only when damaged.

Changing the Lower Knife

Step-by-step guide for replacing the lower knife blade for maintenance or repair.

Replacing the Bulb

Instructions for safely removing and installing a new light bulb for the sewing machine.

Cleaning and Lubricating

Routine maintenance steps for cleaning debris and applying oil to key machine parts.

Trouble and Corrective Measures

Fabric Feed and Stitch Quality Issues

Addresses problems like fabric not feeding, skipped stitches, puckering, or waves.

Needle and Thread Issues

Covers common problems related to needle breakage, thread breakage, and incorrect threading.

Motor Issues

Troubleshooting steps for problems concerning the sewing machine's motor operation.

Specifications

Machine Capabilities

Details thread count, needle types, stitch widths, feed settings, and sewing speed.

Physical Characteristics

Provides the machine's physical dimensions and weight for reference.

Optional Accessories

Specialized Presser Feet

Describes various presser feet for blind stitches, gathering, piping, cording, and beading.

Functional Attachments

Covers attachments like elasticators and the 2/3 thread converter for specialized sewing.

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