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Singer 20U-109 User Manual

Singer 20U-109
60 pages
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Table of Contents

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Singer 20U-109 Specifications

General IconGeneral
TypeIndustrial Sewing Machine
Stitch TypeStraight, Zigzag
Max Stitch Length5 mm
OperationManual
Maximum Stitch Width9 mm
Free ArmNo
MotorClutch Motor
Buttonhole Styles4-step buttonhole
Needle PositionsLeft, center, right
Presser Feetbuttonhole
BobbinClass 15
Included AccessoriesBobbins, Needles, Screwdrivers
DimensionsVaries with table

Summary

Safety Instructions

Important Safety Instructions

Basic safety procedures must be followed before and during machine operation.

Safe Operation

Guidelines to prevent electrical shock, injuries, and accidents during machine use.

Product Description and Machine Specification

Machine Specification

Detailed technical specifications including speed, stitch size, and dimensions.

Setup and Adjustment Instructions

Lubrication

Guidance on lubricating critical parts of the sewing machine for smooth operation.

Needle and Thread

Selection guidelines for proper needles and threads based on material.

Inserting the Needle

Detailed steps for correctly inserting the needle into the needle bar.

Bobbin Winding

Instructions on how to properly wind thread onto the bobbin.

Bobbin Case Threading

Step-by-step guide for threading the bobbin case correctly.

Machine Threading

Comprehensive guide for threading the sewing machine correctly.

Stitch Length Adjustment

How to adjust the stitch length using the feed regulating dial and reverse lever.

Presser Foot Pressure Adjustment

Procedure for adjusting the pressure exerted by the presser foot.

Needle Thread Tension Adjustment

How to regulate the tension of the needle thread using the knob.

Bobbin Thread Tension Adjustment

Adjusting the tension of the bobbin thread using the regulating screw.

Zigzag Stitch Width Control

Detailed procedure to set and regulate the zigzag stitch width.

Maintenance

Safety Inspection

Periodic checks of safety devices, screws, v-belt, and electrical components.

Troubleshooting

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