SWF MAN-12 User Manual

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Page #64 background image

64

Thread breaks ⑫ Dent on thread path on

hook and bobbin case

⑬ Narrow space between

hook holder and groove for

hook holder

⑭ Insufficient oil in hook

⑮ Poor timing of needle and

hook

⒃ Incorrect lower dead stop

⒔ Dent on thread path

⒕ Fabric moves on the

frame/plate

⒖ Inadequate height of

presser foot

(does not press the work

material)

■ Remove dent or change the

case

■ Adjust space

■ Oil the raceway of hook

■ Adjust needle-hook timing

■ Adjust the lower dead stop

■ Check:

① Thread path in presser

foot

② Around needle hole on

needle plate

③ Thread guide on the

head

④ Thread path in tension

adjuster

⑤ Thread path in upper

thread holding device

■ Fix the material firmly

■ Adjust height of the presser

foot

■ Check rotary hook

■ Set it at 0.5-0.7mm

for smooth feeding of

upper thread

Inspection & Repair CauseError Type Reference

Hook

Holder

0.5~0.7mm

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.
M
Michael DuncanAug 28, 2025
What causes needle breaks on my SWF MAN-12?
- G
  Gabriel CarrollAug 28, 2025
  If you're experiencing needle breaks with your SWF Sewing Machine, it could be due to a bent needle (change the needle), a bad quality needle, a worn or bent needle tip, or an inadequate needle size. The needle might be touching the hook point, so space the needle and the hook point. It could also be due to incorrect installation of the needle, so correct the installation. Finally, the needle might be touching the needle hole on the needle plate, so check if the needle plate is unscrewed and adjust the position of the needle bar.
R
Ryan GonzalesAug 30, 2025
Why is my SWF Sewing Machine failing to operate?
- A
  Andrew SullivanAug 30, 2025
  If your SWF Sewing Machine is experiencing operation failure, it could be due to loose belt tension or belt damage, so adjust the belt tension or change the belt. It may also be due to a power failure or short-circuit of the fuse, so change the fuse in the power socket.
J
James WagnerSep 1, 2025
Why is the stop position incorrect on my SWF MAN-12 Sewing Machine?
- D
  donald21Sep 1, 2025
  If your SWF Sewing Machine has an incorrect stop position, it may be due to loose tension on the main driver belt, so change the belt. It could also be caused by an incorrect position of the encoder or a bad encoder, so adjust the position or change the encoder.
L
laura87Sep 3, 2025
What causes a bad jump on my SWF Sewing Machine?
- D
  Donald WilkinsSep 3, 2025
  If your SWF Sewing Machine has a bad jump, it could be due to a bad solenoid or solenoid wiring, so check the wiring and change the solenoid. It may also be due to a bad connection, so check the connector. Another cause could be switch failure on the tension adjusting board or a bad circuit board, so change the switch and circuit board.

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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