JUKI MO-644D User Manual

MO-644D/654DE
IMPORTANT:
Avant de mettre la machine en marche, lire
attentivement et assimiler les regles de securite
de ce manuel.
Conserver le manuel afin de pouvoir le consulter
ul terieurement.
Manuel d’instructions
2-Needle, 2/3/4-Thread Overlock Sewing Machine
Macchina Tagliacuci, 2 Aghi, 2/3/4 Fili
Überwendlich-Nähmaschine Mit 2 Nadeln, 2/3/4 Fäden
Instruction Manual
Manuale di istruzioni
Bedienungsanleitung
IMPORTANTE:
Prima della messa in servizio, leggere e seguire
con attenzione tutte le regole per la sicurezza.
Conservare e consultare questo manuale per
ogni riferimento futuro.
WICHTIG:
Alle sicherheitsvorschriften vor gebrauch der
nähmaschine sorgfältig durchlesen.
Bewahren Sie diese bedienungsanleitung für
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-644D
MO-654DE

JUKI MO-644D Specifications

General

Type	Overlock Sewing Machine
Stitch Length	1 - 4 mm
Maximum Sewing Speed	1500 stitches per minute
Differential Feed Ratio	0.7 - 2.0
Presser Foot Lift	5 mm
Thread Tension	Manual
Weight	7 kg
Needle Type	130/705H
Stitch Type	3/4 thread overlock, rolled hem
Dimensions	270 mm x 345 mm x 295 mm
Number of Threads	2/3/4 Thread

Summary

Important Safety Instructions

DANGER: Electric Shock Risk

Details risks and precautions related to electric shock hazards.

WARNING: Personal Injury Risks

Outlines warnings for burns, fire, electric shock, and injury.

Servicing Double-Insulated Products

Provides guidelines for servicing double-insulated appliances.

Basic Machine Operation

Presser Foot Lifter and Changing

Upper and Lower Knife Adjustment

Stitch Length and Differential Feed Adjustment

How to adjust stitch length and differential feed for gathering or stretching.

Overlocking Width and Presser Foot Pressure

Changing the Needles

Step-by-step guide for replacing the machine's needles.

Threading the Sewing Machine

Threading Preparation and Sequence

Steps for preparing the machine and the correct threading order.

Upper Looper Threading

Lower Looper Threading

Right-Hand Needle Threading

Left-Hand Needle Threading

Thread Tension Dial Adjustment

How to correctly thread the tension dials.

Using the Needle Threader

Instructions for using the accessory needle threader.

3-Thread Overlocking Techniques

4mm Wide 3-Thread Overlock

Instructions for setting up and performing 4mm wide 3-thread overlocking.

6mm Wide 3-Thread Overlock

Instructions for setting up and performing 6mm wide 3-thread overlocking.

Trial Sewing Procedure

Performing a Trial Stitch

Thread Tension Adjustment

Adjusting Thread Tension Dials

Explanation of how to adjust thread tension for optimal stitch formation.

Thread Tension Adjustment Scenarios

Roll Hemming Techniques

Roll Hemmer Operation

How the built-in roll hemmer works for finishing fabric edges.

Roll Hemming Preparation

Steps required before performing roll hemming, including needle removal.

Differential Feed Adjustment

Differential Feed Function and Settings

How differential feed adjusts fabric gathering or stretching for different fabrics.

Troubleshooting Thread Breakage

Handling Thread Breakage During Sewing

Machine Maintenance

Troubleshooting Common Issues

Fabric Feed and Handling Issues

Solutions for fabric feed problems and seam puckering/waving.

Needle, Thread, and Stitch Problems

Troubleshooting for broken needles, skipped stitches, thread breakage, and poor stitch formation.

Motor and Operational Issues