Troubleshooting. Bernette b64 AIRLOCK

Troubleshooting

Fault

Fabric does not feed well.

Needle breaks

Thread breaks

Skipped stitches

Irregular stitches

Fabric puckers

Irregular trimming

Fabric piles up

Machine does not operate

Remedy

• Lengthen stitch length.

• Increase presser foot pressure for heavy weight fabric.

• Decrease presser foot pressure for light weight fabrics.

• Check the setting of di ff erential feed.

• Insert needle correctly.

• Do not pull fabric while sewing.

• Tighten needle set screw.

• Use a larger needle on heavy fabrics.

• Loosen thread tension.

• Check for tangled or caught thread.

• Insert needle correctly.

• Insert new needle; current needle may be bent or have a blunt point.

• Use a high quality thread.

• Insert new needle; current needles may be bent or have a blunt point.

• Tighten needle set screw.

• Insert needles correctly.

• Change type or size of needles.

• Increase presser foot pressure.

• Use a high quality thread.

• Balance thread tension.

• Check for tangled or caught thread.

• Check the setting of di ff

erential feed.

• Loosen thread tension.

• Check for tangled or caught thread.

• Use high quality weight thread.

• Shorten stitch length.

• Decrease presser foot pressure for light weight fabrics.

• Check alignment of knives.

• Replace one or both knives.

• Lengthen stitch length.

• Check the setting of di ff erential feed.

• Check for tangled or caught thread.

• Compress thick layers of fabric with conventional machine before sewing with overlock.

• Connect machine to power source and switch it on.

• Close the hook cover.

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For complete instructions, you can link to the online user manual or how to videos www.bernette.com/ b64AIRLOCK or scan the QR-Code with your smart phone.

www.bernette.com/b64AIRLOCK

5400064.10A.04 - L2P08-02 | en 2022-07

© BERNINA International AG

Steckborn CH, www.bernina.com