Bernette Airlock b64 - User Manual

Questions and Answers

F
fjohnsonAug 14, 2025
What to do if my Bernette Airlock b64 is skipping stitches?
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  Emily GardnerAug 14, 2025
  If your Bernette Sewing Machine is skipping stitches, here are some things you can try: 1. Insert a new needle, as the one you're using may be bent or blunt. 2. Tighten the Needle Set Screw. 3. Ensure that the needle size matches the fabric and thread you're using. 4. Insert the needles correctly. 5. Consider changing the type or size of the needles. 6. Check the threading path to make sure it's correct. 7. Increase the Presser Foot Pressure. 8. Balance the Thread Tension. 9. Use high-quality thread.
S
Samuel PageAug 17, 2025
Why is the thread breaking on my Bernette Airlock b64?
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  Colton KingAug 17, 2025
  To resolve thread breakage on your Bernette Sewing Machine, try the following: * Loosen the Thread Tension. * Check the threading path to ensure it's correct. * Look for any tangled or caught thread that might be causing the issue. * Insert the needle correctly. * Try a new needle, as the current one may be bent or blunt. * Use high-quality thread.
J
jonescatherineAug 21, 2025
Why does the needle keep breaking on my Bernette Airlock b64 Sewing Machine?
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  Christopher FieldsAug 21, 2025
  If the needle breaks on your Bernette Sewing Machine, make sure you insert the needle correctly. Avoid pulling the fabric while sewing. Tighten the Needle Set Screw. Also, use a larger needle for heavier fabrics.
C
Cory BarajasAug 25, 2025
Why are the stitches on my Bernette Airlock b64 Sewing Machine irregular?
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  john20Aug 25, 2025
  If your Bernette Sewing Machine is producing irregular stitches, try balancing the Thread Tension. Also, check for any tangled or caught thread and make sure the threading path is correct.
M
Michael EdwardsAug 27, 2025
Why is my Bernette Sewing Machine not running?
- C
  Christopher ChristianAug 28, 2025
  If your Bernette Sewing Machine is not running, connect the machine to the power source and switch it on. Also, ensure that the Looper cover is closed.
W
westjamesAug 30, 2025
How to improve fabric feed on my Bernette Airlock b64 Sewing Machine?
- R
  Rebecca LangAug 30, 2025
  If the fabric is not feeding well through your Bernette Sewing Machine, try lengthening the stitch length. For heavyweight fabrics, increase the Presser Foot Pressure, and for lightweight fabrics, decrease the Presser Foot Pressure. Also, check the setting of the Differential Feed.
G
gregorygambleSep 3, 2025
How to prevent fabric puckering with my Bernette Sewing Machine?
- S
  Stephanie RogersSep 3, 2025
  If the fabric is puckering while using your Bernette Sewing Machine, check the setting of the Differential Feed. Also, try loosening the Thread Tension, checking for tangled or caught thread, and using high-quality thread. Shorten the stitch length and decrease the Presser Foot Pressure for lightweight fabrics.
J
Jenna LaneSep 6, 2025
What to do if fabric piles up when using my Bernette Airlock b64 Sewing Machine?
- H
  Heather JonesSep 6, 2025
  If the fabric is piling up while using your Bernette Sewing Machine, try reducing the Presser Foot Pressure and check the setting of the Differential Feed. Also, check for any tangled or caught thread. For thick layers of fabric, compress or baste them with a conventional machine before sewing with the Overlocker.
J
Jeffrey LoweSep 10, 2025
How to fix irregular trimming on my Bernette Airlock b64 Sewing Machine?
- J
  Jose SmithSep 10, 2025
  To address irregular trimming with your Bernette Sewing Machine, check the alignment of the Knives and replace one or both Knives if necessary.

Summary

IMPORTANT SAFETY INSTRUCTIONS

Safety Guidelines and Warnings

Essential safety instructions covering electrical shock, injury, and operational hazards.

My bernette Overlocker

Machine Overview and Components

Detailed identification of the overlocker's components and parts.

Symbols and Accessories

Explanation of symbols and overview of standard accessories.

Setting Up the Machine

Workspace and Ergonomics

Guidance on setting up an ergonomic workspace and proper sitting posture.

Machine Connection and Basic Operation

Instructions for connecting power, switching on, and using controls like foot control.

Thread Stand and Guides Setup

Procedures for attaching the thread stand, guides, and spool stabilizers.

Needle and Presser Foot Handling

How to position, change the presser foot, and handle needles.

Sewing Assistance Features

Using features like the thread cutter, knee lifter, and cut-offs bin.

Sewing Start

Pre-Sewing Checks

Essential checks to perform before starting a sewing project.

Selecting Fabric, Thread, and Needles

Guidelines for choosing appropriate fabric, thread, and needle types.

Stitch Types

Overlock Stitch Variations

Description of 4-, 3-, and 2-thread overlock stitches and their applications.

Stitch Selection Guide

Guide to selecting stitches for edge finishing, seams, and flatlock.

Stitch Chart Overview

A comprehensive chart detailing default settings for all stitch types.

Machine Settings

Knife and Cutting Width

How to set the knife on/off and adjust the cutting width.

Looper Converter and Rolled Hem

Using the Upper Looper Converter and Rolled Hem Selection Lever.

Thread Control and Differential Feed

Adjusting thread tension, micro thread control, and differential feed.

Stitch Width and Length Adjustment

Methods for adjusting stitch width and length.

Threading the Overlocker

Threading Preparation

Essential steps and checks before threading the machine.

Air Threader System Operation

Detailed instructions for using the air threader for looper and needle threads.

Manual Threading Techniques

Alternative methods for threading using auxiliary threads or wire.

Thread Changing Procedures

Procedures for changing needle and looper threads, including knotting.

Sewing Test and Stitch Optimization

Performing a Sewing Test

Steps for conducting a test to ensure optimal stitch formation.

Optimizing Stitch Patterns

Troubleshooting common stitch issues and adjustments for various stitch types.

Practical Overlocking Techniques

Securing Overlock Stitches

Methods for securing seams and knotting thread chains.

Flatlock and Gathering

Instructions for creating flatlock seams and gathering fabric.

Sewing Corners and Curves

Techniques for sewing neat outer corners, inner corners, and curves.

Appendix

Machine Storage and Transport

Guidelines for safe storage and transportation of the overlocker.

Maintenance and Cleaning

Procedures for cleaning, oiling, and maintaining the overlocker.

Troubleshooting Guide

Common issues, causes, and solutions for operating the overlocker.

Technical Specifications

Key technical data and specifications of the overlocker machine.

Bernette Airlock b64 Specifications

General

Type	Overlocker
Speed	1300 stitches per minute
Differential Feed	Yes
Differential Feed Ratio	0.7 - 2.0
Maximum Stitch Width	7 mm
Maximum Stitch Length	4 mm
Stitch Length Range	1 - 4 mm
Needle System	ELx705
Stitch Types	Overlock, Flatlock, Rolled Hem
Presser Foot	Snap-on
Number of Threads	4
Number of Needles	1/2