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JUKI DSC-246 User Manual

JUKI DSC-246
32 pages
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R
No.03
40092226
INSTRUCTION MANUAL
DSC-246 DSC-246-7
DSC-246V DSC-246V-7
NOTE : Read safety instructions carefully and understand them before using.
Retain this Instruction Manual for future reference.
Copyright
C
2011-2013 JUKI CORPORATION
All rights reserved throughout the world.
Please do not hesitate to contact our distributors or agents in your area for further information when neces-
sary.
The description covered in this instruction manual is subject to change for improvement of the
commodity without notice.
13 · 09 Printed in Japan
SEWING MACHINERY BUSINESS UNIT
2-11-1, TSURUMAKI, TAMA-SHI,
TOKYO, 206-8551, JAPAN
PHONE : (81)42-357-2371
FAX : (81)42-357-2380
http://www.juki.com

Table of Contents

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JUKI DSC-246 Specifications

General IconGeneral
BrandJUKI
ModelDSC-246
CategorySewing Machine
LanguageEnglish

Summary

TO ENSURE SAFE USE OF YOUR SEWING MACHINE

Understanding Risk Levels

Defines DANGER, WARNING, and CAUTION levels for safety instructions.

Pictorial Warning Indications and Labels Explained

Details the meaning of various safety symbols and labels used on the machine.

SAFETY PRECAUTIONS

General Operating Precautions

General guidelines for safe operation and maintenance, including reading manuals and wearing safety goggles.

Safety Devices and Label Maintenance

Emphasizes checking and maintaining safety devices and keeping warning labels visible.

Proper Machine Application and Modification Policy

Advises against using the machine for unintended applications or modifying it.

Operator Education and Training Requirements

Stresses the need for proper training for operators to ensure safe operation.

Operations Requiring Power Off

Lists essential operations that require the machine to be powered down for safety.

PRECAUTIONS TO BE TAKEN IN VARIOUS OPERATION STAGES

Safe Transportation Guidelines

Guidelines for safely lifting, moving, and transporting the sewing machine to prevent accidents.

Unpacking Procedures

Procedures for safely unpacking the machine, checking for damage, and removing packaging materials.

Machine Installation Guidelines

Instructions for setting up the machine, including table, wiring, grounding, and motor.

Table and Stand Installation

Recommendations for using genuine JUKI tables and securing the machine on a table stand with casters.

Electrical Cable and Wiring Safety

Precautions regarding cable connections, avoiding extra force, and ensuring proper wiring.

Electrical Grounding Requirements

Importance of proper electrical grounding to prevent accidents caused by earth leakage or voltage faults.

Motor Specifications and Safety

Guidance on using specified motors and ensuring entanglement preventive pulley covers are fitted.

Pre-Operation Safety Checks

Checks to perform before turning on the machine, such as cable integrity and pulley direction.

Safety During Machine Operation

Safety measures to follow while the machine is running, avoiding contact with moving parts.

Setting Up the Sewing Machine

Installing the Thread Stand

Steps to assemble and install the thread stand onto the machine table.

Installing the Belt Cover and the Bobbin Winder

Details on how to install the belt cover, belt, and bobbin winder for safe operation.

Lubrication

Guidance on initial lubrication points before operating the sewing machine.

Attaching the Needle

Procedure for correctly inserting and tightening the needle into the needle bar.

Winding a Bobbin

Steps for winding thread onto a bobbin, including routing and tension adjustment.

Threading the Bobbin Case

Instructions for removing the bobbin case and threading the bobbin with thread.

Installing the Take-Up Thread Guide Rod

Guidance on inserting the take-up thread guide rod into its designated hole.

Thread the Machine Head

Step-by-step instructions for threading the sewing machine head for specific models.

Adjusting the Stitch Length

How to adjust the stitch length using the feed adjustment dial and engage reverse feed stitching.

Forward/Reverse Seam Ratio

Procedure for adjusting the forward and reverse stitch ratio to 1:1 for consistent sewing.

Thread Tension

How to adjust the tension of the needle thread and bobbin thread for optimal stitch quality.

Thread Take-Up Spring

Adjusting the standard stroke and tension of the thread take-up spring.

Pressures of the Presser Foot and Walking Foot

How to adjust the pressure of the presser foot and walking foot for different sewing materials.

Height of the Feed Dog (DSC-246, DSC-246-7)

Instructions for adjusting the feed dog height, including specific pin usage and model differences.

Adjusting the Walking Foot and the Presser Foot

Details on adjusting the alternating vertical motions and operating height of the walking and presser feet.

Needle-to-Hook Relationship

Setting the needle bar height and adjusting the timing between the needle and the hook for proper stitch formation.

Auxiliary Thread Tension Controller (DSC-246-7, DSC-246V-7)

How to adjust the auxiliary thread tension based on thread type and cloth slippage.

Adjusting the Pressure of the Fixed Knife (DSC-246-7, DSC-246V-7)

Procedure for adjusting the pressure of the fixed knife for effective thread trimming.

One-Touch Type Reverse Feed Stitching Mechanism (DSC-246-7, DSC-246V-7)

Adjusting the solenoid mounting base for the reverse feed stitching mechanism.

Adjusting the Thread Trimming Cam (DSC-246-7, DSC-246V-7)

Aligning markers and adjusting the thread trimming cam for proper function.

Adjusting the Cam Roller Arm and Cam Roller Arm Presser (DSC-246-7, DSC-246V-7)

Adjusting the clearance between the cam roller arm and presser for thread trimming.

Adjusting Max Moving Stroke of the Rotary Knife (DSC-246-7, DSC-246V-7)

Adjusting the rotary knife's maximum moving stroke for effective thread trimming.

Adjusting the Operating Stroke of the Picker (DSC-246-7, DSC-246V-7)

Adjusting the picker driving plate to ensure the picker operates correctly.

How to Replace the Knives (DSC-246-7, DSC-246V-7)

Steps for replacing the rotary and fixed knives, and adjusting knife pressure.

How to Change from Elliptical Feed to Horizontal Feed

Detailed procedure for converting the feed mechanism from elliptical to horizontal feed.

How to Change from Horizontal Feed to Elliptical Feed

Detailed procedure for converting the feed mechanism from horizontal to elliptical feed.

Motor Pulley and Sewing Speed (DSC-246, DSC-246V)

Table showing the relationship between motor pulley, sewing speed, and motor specifications.

Troubles and Corrective Measures

Common sewing problems and their corresponding solutions, organized by trouble type.

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