Jack JK-T9270D User Manual

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JACK SEWING MACHINE CO.,LTD.
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JK-T9270D/9280D
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Manual book
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Jack JK-T9270D Specifications

General

Brand	Jack
Model	JK-T9270D
Category	Sewing Machine
Language	English

Summary

Safety Instructions

Safety Instruction and Their Meaning

Explains the meaning of safety instructions, indications, and symbols used in the manual.

Indications

Details the meaning of different indications like CAUTION to ensure safe product usage.

Symbols

Explains the meaning of various warning symbols and their significance for safe operation.

Safety Precautions

Using Environment

Outlines recommended environmental conditions for safe sewing machine operation.

Installation Precautions

Provides crucial safety steps and warnings related to machine installation.

Operational Safety

Sewing Safety

Safety guidelines to follow during the sewing process to prevent injury.

Cleaning Safety

Safety instructions to adhere to while performing cleaning operations on the machine.

CAUTION Statements

Sewing/Cleaning CAUTION

Specific caution statements related to sewing and cleaning procedures.

Maintenance and Inspection CAUTION

Safety notes for maintenance and inspection tasks.

WARNING LABELS

1. NAMES OF MAJOR PARTS

2. MACHINE SPECIFICATIONS

3. WORK TABLE

4. INSTALLATION

4-1. Installing the machine head

Details the procedure for mounting the sewing machine head onto the work table.

4-2. Cotton stand

Instructions for assembling and installing the cotton stand for thread spools.

4-3. Lubrication

Explains how to lubricate the sewing machine, including oil types and procedures.

4-4. Checking the machine pulley rotating direction

Guides on how to verify the correct rotational direction of the machine pulley.

5. PREPARATION BEFORE SEWING

5-1. Needle and threads

Provides guidance on selecting appropriate needles and threads based on fabric type.

5-2. Installing the needles

Step-by-step instructions for correctly installing the sewing machine needle.

5-3. Threading the lower threads

Illustrates the process of threading the lower thread through the bobbin and shuttle mechanism.

5-4. Threading the upper threads

Details the procedure for threading the upper thread through the machine's guides.

6. SEWING

6-1. Sewing

Describes the basic steps for operating the sewing machine to start sewing.

7. THREAD TENSION

7-1. Adjusting the thread tension

Explains how to adjust upper and lower thread tension for optimal stitch quality.

7-2. Presser foot pressure adjustment

Guides on adjusting the presser foot pressure for proper fabric feeding.

7-3. Adjusting the stitch length

Details the process for adjusting the stitch length based on material requirements.

7-4. Puller feed adjustment (Machines with puller)

Instructions for adjusting the puller feed mechanism for different fabric types.

8. CLEANING

8-1. Daily cleaning

Outlines daily cleaning procedures to maintain machine performance and longevity.

8-2. Changing the lubricating oil (every three months)

Provides instructions for changing the lubricating oil at regular intervals.

9. STANDARD ADJUSTMENTS

9-1. Needle bar height adjustment

Describes how to adjust the needle bar height for correct needle plate positioning.

9-2. Needle and looper timing adjustment

Explains the procedure for setting the correct timing between the needle and looper.

9-3. Timing of loopers running clear of needles

Details how to adjust the clearance for loopers to pass the needles without interference.

9-4. Needle guard adjustment

Guides on adjusting the needle guard for proper needle protection and clearance.

9-5. Feed dog height adjustment

Instructions for adjusting the height of the feed dog for optimal fabric feeding.

9-6. Upper thread take-up thread guide adjustment

Explains how to adjust the upper thread take-up thread guide for proper thread tension.

9-7. Upper thread arm thread guide adjustment

Details adjusting the upper thread arm thread guide for slight tension.

9-8. Thread release shaft adjustment

Guides on adjusting the thread release shaft for proper tension disc operation.

9-9. Lower thread take-up timing adjustment

Explains how to adjust the timing for the lower thread take-up mechanism.

9-10. Installing the lapper

Instructions for installing the lapper guide plate.

9-11. Puller height adjustment (Machines with puller)

Guides on adjusting the puller height relative to the needle plate.

9-12. Puller timing adjustment (Machines with puller)

Details how to adjust the puller timing based on the needle bar position.

10. TROUBLESHOOTING