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General| Number of Threads | 3 or 4 |
|---|---|
| Type | Overlock |
| Lubrication | Automatic |
| Motor | Servo motor |
| Stitch Types | Overlock |
| Bobbin | None (uses loopers) |
| Speed | Adjustable |
| Presser Feet | Standard Overlock Foot |
How to correctly install the needle.
Steps for threading the sewing machine.
Guide to adjusting the stitch length.
How to adjust the differential feed ratio.
Adjusting the pressure of the presser foot.
How to adjust thread tension.
Instructions for the W4-D Interlock sewing machine panel operation.
Instructions for the W4-UT Electric control box operation.
Explains the LCD display on the operation panel.
Describes the functions of each button on the operation panel.
How to enter and use the parameter mode for settings.
Lists safety alarms and their solutions.
Explains error codes and their corresponding solutions.
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