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Brother KE-434B User Manual

Brother KE-434B
198 pages
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KE-430B, 430C, 431B, 431C
KE-432B, 432C, 433B
SERVICE MANUAL
KE-434B, 434C, 435B, 435C
KE-436B, 436C, 484C
BE-438B, 438C
Please read this manual before using the machine.
Please keep this manual within easy reach for quick reference.
ELECTRONIC LOCKSTITCH BAR TACKER
ELECTRONIC LOCKSTITCH BELT LOOP BAR TACKER
ELECTRONIC LOCKSTITCH PATTERN TACKER
ELECTRONIC LOCKSTITCH BUTTON SEWER

Table of Contents

Questions and Answers:

Brother KE-434B Specifications

General IconGeneral
BrandBrother
ModelKE-434B
CategorySewing Machine
LanguageEnglish

Summary

Safety Instructions

1. Safety Indications and Their Meanings

Explains the meaning of safety indications and symbols used on the machine.

Notes on Safety

Environmental Requirements

Details environmental conditions required for optimal machine operation and safety.

Installation

Provides instructions and precautions for the safe and proper installation of the sewing machine.

Sewing Precautions

Covers safety precautions related to the sewing operation itself.

Cleaning Safety

Outlines safety procedures and precautions to be followed during the cleaning of the sewing machine.

Maintenance and Inspection Safety

Details safety guidelines for performing maintenance and inspection on the sewing machine.

Warning Labels

Specifications

1-1. Specifications Overview

Provides detailed technical specifications for various sewing machine models.

1-2. Standard Thread Tension

Details standard thread tension settings for different materials and machine models.

1-2-1. Measuring Tension

Explains how to measure and check thread tensions for optimal sewing.

Mechanical Descriptions

2-1. Needle Bar and Thread Take-Up Mechanisms

Describes the mechanical components of the needle bar and thread take-up systems.

2-2. Lower Shaft and Shuttle Race Mechanisms

Explains the mechanical workings of the lower shaft and shuttle race.

2-3. Work Clamp Lifter Mechanism

Details the mechanical assembly and operation of the work clamp lifter.

2-4. Work Clamp Open-Close Mechanism (KE-432B, 432C)

Describes the mechanism for opening and closing the work clamp on specific models.

2-5. Thread Wiper Mechanism

Explains the mechanical operation of the thread wiper.

2-6. Feed Mechanism

Details the mechanical components responsible for the X and Y feed movements.

2-7. Thread Trimmer Mechanism

Explains the mechanical operation of the thread trimming system.

2-8. Thread Nipper Mechanism

Describes the mechanical components and function of the thread nipper mechanism.

2-9. Thread Take-Up Mechanism

Explains the mechanical operation of the thread take-up mechanism.

Disassembly

3-1. Covers Disassembly

Instructions for disassembling the various covers of the sewing machine.

3-2. Work Clamp Arm Mechanism (KE-430B, 430C, 431B, 431C)

Step-by-step guide for disassembling the work clamp arm mechanism for specific models.

3-3. Work Clamp Arm Mechanism (KE-432B, 432C)

Step-by-step guide for disassembling the work clamp arm mechanism for KE-432B/432C.

3-4. Work Clamp Arm Mechanism (KE-433B)

Step-by-step guide for disassembling the work clamp arm mechanism for KE-433B.

3-5. Work Clamp Arm Mechanism (KE-434B, 434C, 435B, 435C, 436B, 436C, 484C)

Disassembly instructions for the work clamp arm mechanism on multiple models.

3-6. Work Clamp Arm Mechanism (BE-438B, 438C)

Disassembly procedure for the work clamp arm mechanism on BE-438B/438C models.

3-7. Shuttle Hook Mechanism

Step-by-step guide for disassembling the shuttle hook mechanism.

3-8. Needle Bar Mechanism

Instructions for disassembling the needle bar mechanism.

3-9. Stepping Foot Mechanism (KE-435B, 435C, 436B, 436C)

Disassembly procedure for the stepping foot mechanism on specific models.

3-10. Upper Shaft Mechanism

Step-by-step instructions for disassembling the upper shaft mechanism.

3-11. Lower Shaft Mechanism

Instructions for disassembling the lower shaft mechanism.

3-12. Feed Mechanism (1)

Part one of the feed mechanism disassembly instructions.

3-13. Feed Mechanism (2)

Part two of the feed mechanism disassembly instructions.

3-14. Work Clamp Lifter Mechanism (Solenoid Specifications)

Disassembly instructions for the work clamp lifter for solenoid specifications.

3-15. Stepping Foot Lifter Mechanism (KE-435B, 435C, 436B, 436C)

Disassembly procedure for the stepping foot lifter mechanism on specific models.

3-16. Thread Wiper Mechanism

Disassembly instructions for the thread wiper mechanism.

3-17. Thread Nipper Mechanism

Step-by-step guide for disassembling the thread nipper mechanism.

3-18. Thread Take-Up Mechanism

Instructions for disassembling the thread take-up mechanism.

3-19. Thread Trimmer Mechanism

Step-by-step instructions for disassembling the thread trimmer mechanism.

Assembly

4-1. Thread Trimmer Mechanism (1)

Part one of the thread trimmer mechanism assembly instructions.

4-2. Thread Nipper Mechanism

Instructions for assembling the thread nipper mechanism.

4-3. Thread Wiper Mechanism

Procedure for assembling the thread wiper mechanism.

4-4. Thread Take-Up Mechanism

Instructions for assembling the thread take-up mechanism.

4-5. Work Clamp Lifter Mechanism (Solenoid Specifications)

Assembly instructions for the work clamp lifter for solenoid specifications.

4-6. Feed Mechanism (1)

Part one of the feed mechanism assembly instructions.

4-7. Feed Mechanism (2)

Part two of the feed mechanism assembly instructions.

4-8. Upper Shaft Mechanism

Step-by-step instructions for assembling the upper shaft mechanism.

4-9. Stepping Foot Lifter Mechanism (KE-435B, 435C, 436B, 436C)

Assembly procedure for the stepping foot lifter mechanism on specific models.

4-10. Stepping Foot Mechanism (KE-435B, 435C, 436B, 436C)

Assembly instructions for the stepping foot mechanism on specific models.

4-10-1. Adjusting the Lowest Point of the Presser Foot

How to adjust the lowest point of the presser foot.

4-11. Needle Bar Mechanism

Instructions for assembling the needle bar mechanism.

4-12. Lower Shaft Mechanism

Step-by-step guide for assembling the lower shaft mechanism.

4-13. Thread Trimmer Mechanism (2)

Part two of the thread trimmer mechanism assembly instructions.

4-14. Shuttle Hook Mechanism

Instructions for assembling the shuttle hook mechanism.

4-15. Work Clamp Arm Mechanism (KE-430B, 430C, 431B, 431C)

Step-by-step guide for assembling the work clamp arm mechanism for specific models.

4-16. Work Clamp Arm Mechanism (KE-432B, 432C)

Assembly instructions for the work clamp arm mechanism on KE-432B/432C models.

4-17. Work Clamp Arm Mechanism (KE-433B)

Step-by-step guide for assembling the work clamp arm mechanism for KE-433B.

4-18. Work Clamp Arm Mechanism (KE-434B, 434C, 435B, 435C, 436B, 436C, 484C)

Assembly instructions for the work clamp arm mechanism on multiple models.

4-19. Work Clamp Arm Mechanism (BE-438B, 438C)

Assembly procedure for the work clamp arm mechanism on BE-438B/438C models.

4-20. Work Clamp Arm Mechanism (Applying Grease)

Guidance on applying grease to work clamp arm mechanisms for smooth operation.

4-21. Covers Reassembly

Instructions for reassembling the various covers of the sewing machine.

Adjustment

5-1. Adjusting the Needle Bar Height

Explains how to adjust the vertical position of the needle bar for optimal sewing.

5-2. Adjusting the Needle Bar Lift Amount

Details the procedure for adjusting the amount of vertical movement of the needle bar.

5-3. Adjusting the Driver Needle Guard

Instructions for adjusting the driver needle guard to prevent contact with the needle.

5-4. Adjusting the Needle Clearance

Explains how to set the correct clearance between the needle and the rotary hook.

5-5. Adjusting the Shuttle Race Thread Guide

Procedure for adjusting the shuttle race thread guide for proper thread handling.

5-6. Adjusting Shuttle Hook and Bobbin Case Holder Clearance (KE-484C)

Specific adjustment for KE-484C regarding clearance between shuttle hook and bobbin case holder.

5-7. Adjusting Work Clamp Lift Amount (KE-430B, 430C, 431B, 431C, 433B)

How to adjust the vertical lift of the work clamp for specific models.

5-8. Adjusting Work Clamp Lift Amount (KE-432B, 432C)

How to adjust the vertical lift of the work clamp for KE-432B/432C models.

5-9. Adjusting Work Clamp Lift Amount (KE-434B, 434C, 435B, 435C, 436B, 436C, 484C)

How to adjust the vertical lift of the work clamp for various other models.

5-10. Adjusting Button Clamp Lift Amount (BE-438B, 438C)

How to adjust the vertical lift of the button clamp for BE-438B/438C models.

5-11. Work Clamp Pressure Adjustment (KE-432B, 432C)

Procedure to adjust the pressure applied by the work clamp on KE-432B/432C models.

5-12. Adjusting Holding Pressure (BE-438B, 438C)

How to adjust the holding pressure for BE-438B/438C models.

5-13. Work Clamp Closing-Distance Adjustment (KE-432B, 432C)

Adjusting the distance the work clamp closes on KE-432B/432C models.

5-14. Adjusting Button Holder Position (BE-438B, 438C)

How to adjust the position of the button holder for BE-438B/438C models.

5-15. Work Clamp Adjustment (KE-435B, 435C, 436B, 436C)

General work clamp adjustment for KE-435B/435C/436B/436C models.

5-16. Changing Work Clamp Lift (KE-435B, 435C, 436B, 436C)

How to change the work clamp lift amount for specific models.

5-17. Adjusting the Thread Wiper

Procedure to adjust the thread wiper for optimal performance.

5-18. Adjusting Thread Take-Up Amount

How to adjust the thread take-up amount for proper thread feeding.

5-19. Adjusting the Movable Knife

Instructions for adjusting the movable knife for clean thread trimming.

5-19-1. Replacing Movable and Fixed Knives (KE-430B-433B, BE-438B/438C)

Step-by-step guide for replacing the movable and fixed knives for multiple models.

5-19-2. Replacing Movable and Fixed Knives (KE-434B, 434C, 435B, 435C, 436B, 436C)

Instructions for replacing the movable and fixed knives for specific models.

5-19-3. Replacing Movable and Fixed Knives (KE-484C)

Procedure for replacing the movable and fixed knives for the KE-484C model.

5-19-4. Adjusting Movable and Fixed Knife Engagement

How to adjust the engagement of the movable and fixed knives for proper cutting.

5-20. Adjusting Thread Trimming Link Mechanism

Adjusting the thread trimming link mechanism for correct operation.

5-21. Adjusting the Backlash

How to adjust backlash in various mechanisms for smooth operation.

5-22. Adjusting Presser Solenoid Position (Solenoid Specifications)

Adjusting the position of the presser solenoid for solenoid-equipped models.

5-23. Adjusting Sensor Perceive Plate Position (Solenoid Specifications)

Adjusting the sensor perceive plate for solenoid models.

5-24. Adjusting the Home Position

Procedure to set the machine's home position for X and Y axes.

5-25. Adjusting Needle Up Stop Position

How to set the needle to stop at the correct upper position.

5-26. Adjusting Upper Shaft Timing Belt Tension

Adjusting the tension of the upper shaft timing belt for proper power transmission.

5-27. Checking Head Position Switch

Verifying the correct operation and position of the head position switch.

5-28. Work Clamp Interchangeability (KE-433B)

Information on using work clamps interchangeably with KE-433B.

5-29. Work Clamp Interchangeability (KE-434B, 434C, 435B, 435C, 436B, 436C, 484C)

Details on interchangeable work clamps for various models.

5-30. Adjustment of Air Pressure (Pneumatic Specifications)

How to adjust air pressure for pneumatic systems.

5-31. Adjustment of Inner Clamping Device

Adjustment procedures for the inner clamping device.

Troubleshooting

Optional Parts

Two-Pedal Foot Switch

Description of the two-pedal foot switch option for enhanced operator control.

Two-Step Foot Switch

Details the two-step foot switch option, a pedal-type control.

Solenoid Thread Wiper

Describes the solenoid thread wiper option for independent thread wiping.

Work Clamp Set QC (KE-430*)

Optional work clamp set for easy replacement and adjustment.

Liquid Cooling Tank

Optional liquid cooling tank to prevent thread breakage due to heat.

Three-Pedal Foot Switch (for Pneumatic)

Optional three-pedal foot switch for pneumatic models with independent clamp control.

Emergency Stop Switch

Optional emergency stop switch for immediate machine halt.

Work Clamp Plate, OT (KE-435*, 436*)

Optional work clamp plate for even clamping and easy part replacement.

Thread Breakage Detector (KE-436*)

Optional detector to warn of thread breakage, activating emergency stop.

2-Step Thread Tension Device (KE-436*)

Optional device to switch upper thread tension via programmer settings.

Needle Cooler (KE-436*)

Optional pneumatic needle cooler to prevent thread breakage from heat.

Air Wiper (KE-436*)

Optional air-driven thread wiper for difficult-to-pull threads.

Programmer (KE-436*)

Software for creating new sewing patterns using a PC.

Electric Mechanism

8-1. Precautions at the Time of Adjustment

Safety precautions to observe when opening the control box for maintenance.

8-2. Components Inside Control Box and Operation Panel

Brief explanation of the main components within the control box and operation panel.

8-3. Fuse Explanation

Details the different types of fuses, their part codes, and when they might blow.

8-4. Connectors

Information about connectors and the importance of proper connection for troubleshooting.

8-4-2. Contact Failure

Troubleshooting guide for problems related to connector contact failures.

8-5. Explanation of DIP Switches

Explains the function of DIP switches on the operation panel for various models.

8-5-1. Operation Panel DIP Switches (KE-430*, 431*, 432*, 433B, 434*, 435*, 484C, BE-438*)

Details the functions of DIP switches on the operation panel for specific machine models.

8-5-2. Operation Panel DIP Switches (KE-436B, 436C)

Explains the function of DIP switches on the operation panel for KE-436B/436C models.

8-5-3. DIP Switches Inside the Control Box

Explains the function of DIP switches located inside the control box.

8-6. Explanation of Memory Switches (KE-430*, 431*, 432*, 433B, 434*, 435*, 484C, BE-438*)

Explains the function and settings of memory switches on the operation panel for various models.

8-7. Explanation of Memory Switches (KE-436B, 436C)

Explains the function and settings of memory switches for KE-436B/436C models.

8-8. Setting the Work Clamp Mode

How to set the work clamp mode using DIP switches and memory switches.

8-8-1. Light Work Clamp

Instructions for using the light work clamp feature, including hose connections.

8-9. Checking Input Sensor and DIP Switch Input

Procedure to check input sensor status and DIP switch input on the operation panel.

8-10. Checking the Input Voltage

How to check the input voltage to the sewing machine via the operation panel.

8-11. Clearing All Memory Settings

Procedure to clear all memory settings and reset the machine to factory defaults.

8-12. Confirming Software Version

How to check the software version of the machine's internal PROMs.

8-13. Table of Error Codes

A comprehensive list of error codes, their causes, and remedies for troubleshooting.

8-14. Troubleshooting

General troubleshooting information for machine issues.

8-14-1. Troubleshooting Flowchart

A visual guide to diagnose and resolve machine problems based on symptoms.

8-14-2. Problem Solution and Measures

Detailed solutions and measures for specific problems identified in the troubleshooting flowchart.

8-15. Control Circuit Block Diagram

A block diagram illustrating the control circuit connections of the sewing machine.

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