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JUKI AMS-221EN Series User Manual

JUKI AMS-221EN Series
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– 221 –
1. Thread comes off at the start of 1-1) Stitch skipping at the start of 1-A) Too much clearance between
Set the clearance at 0.05 to 0.1mm between the needle and the hook.
sewing sewing needle and hook.
Set up “soft start” at the beginning of sewing.
1-B)Penetration registance of the Use a thinner needle. (Lower the needle count to be
thread against the cloth is small.
used.)
1-2) Length of thread remaining 2-A)
Tension controller No. 1 provides
Properly adjust the tension controller No. 1.
at the needle is not sufficient. an excessive tension.
2-B) Floating of the AT thread Adjust the amount of AT thread tension floating.
tension disc is insufficient.
2-C)Stroke of the thread take-up Adjust the stroke of the thread take-up spring.
spring is excessive.
2-D)The thread take-up spring Adjust the thread take-up spring tension.
tension is insufficient.
2-E) Level difference between the Adjust the height of the counter knife.
needle hole guide and the
counter knife is excessively high.
2-F) Needle thread tension is high Adjust the needle thread tension.
and the thread is excessively
stretched.
2-G)Thread spreading section of Polish the thread spreading section of the moving
the moving knife has scratches. knife with buff or replace the knife.
1-3)Length of bobbin thread re- 3-A)
Level difference between the
Adjust the height of the counter knife.
maining is not sufficient. needle hole guide and the (Otherwise, widen the gap.)
counter knife is excessively high.
3-B)Lower face of the needle hole Polish the needle hole guide with a buff or replace it.
guide has scratches.
3-C)
Thread spreading section of the
Polish the thread spreading section of the moving
moving knife has scratches. knife with buff or replace the knife.
3-D)Shuttle upper spring has Polish the shuttle upper race with a buff or replace
scratches. it.
3-E)The bobbin thread tension is Adjust the bobbin thread tension.
excessive.
3-F) The bobbin or bobbin case Polish it with a buff or replace it.
has scratches.
Trouble Cause (1) Cause (2) Check and corrective measures
(2) Sewing conditions
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Table of Contents

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JUKI AMS-221EN Series Specifications

General IconGeneral
BrandJUKI
ModelAMS-221EN Series
CategorySewing Machine
LanguageEnglish

Summary

Preface

Specifications

Configuration

Names of Main Unit

Labels the various parts of the sewing machine's main unit.

IP-420 Operation Panel

Describes the functions and layout of the IP-420 operation panel.

Standard Adjustment

Throat Plate Auxiliary Cover Height Adjustment

Instructions for adjusting the height of the throat plate auxiliary cover.

Feed Base Auxiliary Cover Rail X Adjustment

Steps to adjust the feed base auxiliary cover rail X.

X Movement Top Cover Adjustment

Procedures for adjusting the X movement top cover.

Main Shaft Connection and Disconnection

Detailed steps for connecting and disconnecting the main shaft.

Main Shaft Motor and Coupling Removal

Instructions for removing the main shaft motor and its coupling.

Crank Rod Connection and Disconnection

Steps for connecting and disconnecting the crank rod.

Crank Balancer Positioning

How to correctly position the crank balancer for optimal operation.

Intermediate Presser Cam Adjustment

Steps for adjusting the intermediate presser cam.

Intermediate Presser Bar Adjustment

Procedure for adjusting the intermediate presser bar.

Intermediate Presser Variable Connection/Disconnection

Detailed steps for connecting and disconnecting the intermediate presser variable.

Intermediate Presser Variable Adjustments

Instructions for performing variable adjustments on the intermediate presser.

Intermediate Presser Drive Arm

Adjustment procedures for the intermediate presser drive arm.

Lower Shaft Backlash Adjustment and Connection/Disconnection

How to adjust lower shaft backlash and connect/disconnect it.

Oscillator Gear Positioning

Steps to ensure the correct positioning of the oscillator gear.

Hook Oil Amount Adjustment

Procedure for adjusting the amount of oil supplied to the hook.

Shuttle Connection/Disconnection and Oil Wick Piping

Steps for connecting/disconnecting the shuttle and its oil wick piping.

Needle Bar Height Adjustment

How to adjust the height of the needle bar for correct operation.

Hook Adjustment

Detailed instructions for adjusting the hook mechanism for proper sewing.

Thread Trimmer Presser Lifter Cam Connection/Disconnection

Steps for connecting and disconnecting the thread trimmer presser lifter cam.

Thread Trimmer and Presser Origin Sensor Adjustment

Procedures for adjusting the origin sensors for the thread trimmer and presser.

Moving Knife and Counter Knife Position Adjustment

How to adjust the positions of the moving and counter knives.

Thread Tension Disk Floating Amount

Adjusting the floating amount of the thread tension disk.

Second Thread Tension Connection/Disconnection

Steps for connecting and disconnecting the second thread tension unit.

AT Unit Connection and Disconnection

Instructions for connecting and disconnecting the AT unit.

Wiper Adjustment

Procedure for adjusting the wiper mechanism to ensure proper operation.

X Motor Backlash Adjustment

How to adjust backlash for the X motor to ensure smooth movement.

Y Motor Backlash Adjustment

How to adjust backlash for the Y motor for smooth operation.

X Timing Belt Tension Adjustment

Procedures for adjusting the tension of the X timing belt.

Y Timing Belt Tension Adjustment

Steps to adjust the tension of the Y timing belt.

Removing Rattles from Y Drive Shaft

Methods to eliminate rattles from the Y drive shaft.

Y Timing Belt Phase Adjustment

How to perform phase adjustments for the Y timing belt.

X-Y Mechanism Adjustment

Detailed instructions for adjusting the X-Y mechanism.

Slide Plate Bearing Pressure Adjustment

How to adjust the pressure for the slide plate bearing.

Presser Cylinder Initial Length

Setting the initial length for the presser cylinder.

2-Step Stroke Cylinder Initial Length

Setting the initial length for the 2-step stroke cylinder.

Speed Controller Adjustment

How to adjust the speed controllers for cylinders.

Pressure Reducer Adjustment

Procedure for adjusting the pressure reducer for the presser cylinders.

Origin Setting Gauge Creation

How to create an origin setting gauge for sensor adjustments.

X Origin Sensor Adjustment

Steps to adjust the X origin sensor for proper positioning.

Y Origin Sensor Adjustment

Instructions for adjusting the Y origin sensor for correct positioning.

Bobbin Winder Driving Wheel Position Adjustment

How to adjust the position of the bobbin winder driving wheel.

Bobbin Winder Amount Adjustment

Procedure for adjusting the amount of thread wound on the bobbin.

Shuttle Upper Spring and Lower Thread Holder Position Adjustment

Adjusting the shuttle upper spring and lower thread holder positions.

Shuttle Felt

Information regarding the shuttle felt and its proper installation.

Shuttle Race Ring Shape

Specifications for the shuttle race ring shape and wear check.

Thread Take-up Spring Adjustment

How to adjust the thread take-up spring's stroke and tension.

Needle Thread Clamp Device Connection/Disconnection

Steps for connecting and disconnecting the needle thread clamp device.

Needle Thread Clamp Notch Adjustment

How to adjust the notch position of the needle thread clamp.

Needle Thread Clamp Sensor Adjustment

Procedure for adjusting the needle thread clamp sensor.

Adjustment of Tilt Mechanism of Machine Head

Lifter Bracket Position Adjustment

Steps to fix and adjust the position of the lifter brackets.

Falling Stopper Position Adjustment

How to adjust the position of the falling stopper for safety.

Falling Stopper ON/OFF Spring Tension Adjustment

Adjusting the spring tension for the falling stopper's ON/OFF function.

Gas Spring Replacement

Procedure for replacing the gas spring in the machine head mechanism.

Memory Switch

Start and Change Memory Settings

Steps to start and modify settings in the memory switch.

Function List

A list of functions configurable via memory switches, with their ranges and initial values.

Supplemental Remarks of Each Function and Explanation

Feeding Frame Operational Sequence Setup

How to set up the operational sequence for the feeding frame.

Feeding Frame Driving Way Setup

Setting up the driving methods for the feeding frame and pedal operation.

Feeding Frame ON/OFF Sequence by Temporary Stop Command

Configuring the feeding frame sequence using temporary stop commands.

Feeding Frame Lifting at End of Sewing

Setting the timing for feeding frame lifting at the end of sewing.

Feeding Frame Lifting Setup at Temporary Stop

Setting up the feeding frame lifting timing during temporary stops.

Feeding Frame Lifting Prohibition Setup

Configuring settings to prohibit feeding frame lifting.

Presser Pedal Setup

Setting up the operational methods for the presser pedal.

Fixed Refuge Position Setup

Selection of Fixed Refuge Position

How to select whether the fixed refuge position is used or not.

Fixed Refuge Position Coordinates Setup

Setting up the X and Y coordinates for the fixed refuge position.

Bank Function Setup

Bank Function Setup (Menu)

Setting up the number of banks and barcode function.

External Input Terminal Setup

Configuring the input terminal numbers for the bank function.

Port I/O Setup

Input Terminal Setup

Setting up the functions for various input terminals.

Output Terminal Setup

Configuring functions for various output terminals.

Simplified Program Setup

Specifications

Overview of the capabilities and limits of the simplified program.

Setting Items

Details the five items configurable for each step in a simplified program.

Control Operation

How simplified programs are executed sequentially and controlled.

Operational Procedures

Describes the steps for operating and managing simplified programs.

Simplified Program Selection Screen Display

How to display the screen for selecting simplified programs.

Simplified Program Effectiveness

Enabling or disabling the simplified program function.

Simplified Program Editing

Steps for editing and modifying simplified programs.

Simplified Program Editing Details

Detailed steps for editing commands, I/O setup, and parameters in simplified programs.

Parameter Input

Entering parameter values for simplified program steps.

Step Insertion

How to insert new steps into a simplified program.

Checking Simplified Program Status in Sewing Screen

Viewing the status of simplified programs while operating the sewing machine.

List of Simplified Program Commands

Program Sample

Simplified Stacker Program 1

An example program for material stacking during sewing.

Stacker Program 2

A second example program for material stacking operations.

Port I/O Setup Sheet

Simplified Program Setup Sheet

Printed Wiring Board and Dip Switch

Various Printed Wiring Boards

Illustrations and descriptions of the different printed wiring boards.

Dipswitch Setup

Instructions for setting up the dipswitches on various boards.

Table of Exchanging Gauge Parts by Sewing Specifications and Needle Size

Option List

Method of Pedal Switch Cable Set Connections

Parts List

List of parts required for the pedal switch cable set.

Switch Mounting Position

Details on the correct mounting position for switches.

Memory Switch Modification

Changes to memory switches for pedal operation customization.

Operation Control Items

Items related to the control of pedal operations.

Switch Mounting Position Diagram

Diagram illustrating switch mounting positions.

Maintenance

Fuse Replacement

Step-by-step guide on how to replace fuses in the machine.

Voltage Specification Change

Instructions for changing the machine's voltage specifications.

Greasing and Lock-tight Parts

Information on recommended greases and parts requiring lock-tight application.

Grease Replenishment

Step-by-step guide on where and how to apply grease.

Grease-up Procedures for Specified Positions

Detailed steps for applying grease to specific locations.

Test Sewing Function

Performing Test Sewing from PM-1

Steps for receiving data from PM-1 and editing vector parameters.

Modifying Data and Test Sewing Execution

How to modify data, execute test sewing, and register it.

Information Screen at Maintenance Personnel Level

Error History

Viewing recorded error codes and their details for troubleshooting.

Cumulative Operating Information

Accessing data on cumulative operating time, thread trimming, and stitch counts.

Test Mode

Display of the Check Program Screen

How to access the check program screen within test mode.

Touch Panel Correction

Calibrating the touch panel for accurate input.

LCD Check

Verifying the functionality and dot integrity of the LCD display.

Input Signal Check Method

How to check the status of various input signals and sensors.

Main Motor RPM Check

Checking the main motor's RPM and operation.

Output Check Method

How to check the status of various output signals.

XY Motor and Origin Sensor Check

Verifying the operation of XY motors and their origin sensors.

Presser and Thread Trimmer Motor/Origin Sensor Check

Checking presser and thread trimmer motors and their origin sensors.

Needle Thread Clamp Motor/Origin Sensor Check

Verifying the needle thread clamp motor and its origin sensor.

Continuous Operation Method

How to set up and perform continuous operation.

Intermediate Presser Motor/Origin Sensor Check

Checking the intermediate presser motor and its origin sensor.

Printed Wiring Board and Dip Switch

Various Printed Wiring Boards

Illustrations and descriptions of the different printed wiring boards.

Dipswitch Setup

Instructions for setting up the dipswitches on various boards.

Table of Exchanging Gauge Parts by Sewing Specifications and Needle Size

Option List

Method of Pedal Switch Cable Set Connections

Parts List

List of parts required for the pedal switch cable set.

Switch Mounting Position

Details on the correct mounting position for switches.

Memory Switch Modification

Changes to memory switches for pedal operation customization.

Operation Control Items

Items related to the control of pedal operations.

Switch Mounting Position Diagram

Diagram illustrating switch mounting positions.

Troubles and Corrective Measures

Mechanical Parts Troubles

Troubleshooting guide for mechanical problems encountered with the sewing machine.

Sewing Conditions Troubles

Troubleshooting guide for problems related to sewing conditions and thread issues.

Electrical Components Troubles

Troubleshooting guide for electrical issues and component identification.

Circuit Diagrams

Block Diagram

A high-level overview of the machine's system architecture.

Power Supply Circuit Diagram A

Diagram showing the first configuration of the power supply circuit.

Power Supply Circuit Diagram B

Diagram showing the second configuration of the power supply circuit.

Power Supply Circuit Diagram C

Diagram showing the third configuration of the power supply circuit.

Servo Motor Circuit Diagram

Illustration of the servo motor's electrical connections.

Sensor-Pedal Circuit Diagram

Diagram showing the wiring for sensors and pedals.

MAIN-PANEL Board Circuit Diagram

Electrical diagram for the MAIN and PANEL boards.

Motor and Solenoid Circuit Diagram

Electrical diagram for motor and solenoid connections.

Air System Circuit Diagram

Diagram illustrating the pneumatic system and solenoid valves.

Drawing of the Table

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