SWF MAN-12 User Manual

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35

– When using special threads, such as artificial

silk, you might want to turn the groove of the

needle to the right in order to minimize the

thread breaks.

8.2.4) Relationship between needle and hook

– Adjusting timing between needle and hook

Default timing of the needle and the hook is set by the main shaft angle of 201°. Relationship between the

needle and the hook varies as below.

Top edge of the

needle hole

Top point of hook

circumference

a

Hook point

Top edge of the

needle hole

Needle tip

Lower dead stop

of the needle bar

Hook point

b

c

a. At lower dead stop of the needle bar 2.3~3.7 mm

b. At needle-hook timing 1.8~2.2 mm

c. At needle-hook timing 0.5~1.5 mm

If the needle is not inserted all the way to the top of the needle bar hole, timing of the machine

will go off, causing broken needles and thread breaks.

CAUTION

Table of Contents

Questions and Answers:

R
randall23Aug 19, 2025
Why does the thread keep breaking on my SWF MAN-12 Sewing Machine?
- A
  Ashley OlsenAug 19, 2025
  If your SWF Sewing Machine experiences thread breaks, the issue might stem from several causes. The stitch may be too small or dense for the thread, requiring you to re-punch the design. Frequent breaks in the same spot suggest a need to re-punch after checking the design. An inadequate needle size for the thread calls for a needle change suitable for the thread type. A damaged needle (bent, dented, or worn) also necessitates a needle change. Incorrect needle installation (height, direction, etc.) requires re-installation. Lastly, a dirty needle (adhesive, etc.) suggests cleaning or changing both the needle and hook.
M
mgomezAug 23, 2025
Why is the stitch quality bad on my SWF MAN-12?
- K
  Krystal RogersAug 25, 2025
  If your SWF Sewing Machine is producing bad stitch quality, it could be due to several factors. The tape data might be bad, requiring correction. The tension on the X-Y belt may be inadequate, so you should adjust the tension. There might be foreign substances in the X-Y rail, so you should clean them. The X/Y drivers might have failed, so you should replace them. Finally, a heavy load on the frame could be the cause, so try reducing the speed of main shaft rotation.
S
Stacey ClarkeAug 26, 2025
How to fix poor stitch tension on my SWF MAN-12 Sewing Machine?
- N
  Nicole JonesAug 26, 2025
  If your SWF Sewing Machine is experiencing poor stitch tension, it could be due to several reasons: Weak upper thread tension, which requires adjustment. Uneven upper thread tension due to foreign substances, necessitating cleaning of the main and sub tension adjusters in the thread tension adjusting plate. Weak lower thread tension, which requires adjustment. Uneven lower thread tension, so clean the bobbin case and check tension on the bobbin spring. The thread thickness might be the cause, so change to a quality thread. Poor timing of needle and hook, requiring adjustment. Insufficient oil in hook, so oil the raceway of hook.

SWF MAN-12 Specifications

General

Brand	SWF
Model	MAN-12
Category	Sewing Machine
Language	English

Summary

Safety Rules

Safety Indications

Defines hazard symbols: DANGER, WARNING, and CAUTION.

Machine Delivery

Provides instructions for safe machine transport and handling.

Machine Installation

Specifies environmental and physical installation requirements.

Machine Operation

Outlines critical safety practices during machine operation.

Machine Installation and Precautions

Installation Condition

Specifies environmental requirements like temperature and humidity.

Electricity Installation Environment

Details electrical supply requirements and safety precautions.

Leveling the Machine

Machine Use and Precautions

Types of Safety Labels

Locations of Safety Labels

Names of Machine Parts

Basic Functions for Machine Operation

Basic Operation

Upper Threading and Tension Adjustment

Lower Threading and Tension Adjustment

Needle-Hook Timing and Related Tips

Covers needle selection, relation to thread, and timing.

Maintenance and Inspection

Check Points for Regular Inspection

Oil Supply

Adjusting Major Parts of the Machine

Trimmer Adjustment

Relationship Between Presser Foot and Needle

Adjusting Encoder

Adjusting Tension of Each Drive Belt

Troubleshooting

Causes and Troubleshooting

Lists common operational errors and their potential causes and solutions.

Error Display and Troubleshooting

Details specific error codes and corresponding troubleshooting steps.

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