Appendix
81
2020-09 EN 5040064.00A.04
10.3 Troubleshooting
Fault Solution
Fabric does not feed well.
> Lengthen the stitch length.
> Increase the Presser Foot Pressure for heavyweight fabric.
> Decrease the Presser Foot Pressure for lightweight fabrics.
> Check the setting of the Differential Feed.
Needle breaks
> Insert the needle correctly.
> Do not pull the fabric while sewing.
> Tighten the Needle Set Screw.
> Use a larger needle on heavyweight fabrics.
Thread breakage
> Loosen the Thread Tension.
> Check the threading path.
> Check for tangled or caught thread.
> Insert the needle correctly.
> Insert a new needle; inserted needles may be bent or have a
blunt point.
> Use high quality thread.
Skipped stitches
> Insert a new needle; the inserted needles may be bent or
have a blunt point.
> Tighten the Needle Set Screw.
> Match the needle size with the fabric/thread.
> Insert the needles correctly.
> Change the type or size of the needles.
> Check the threading path.
> Increase the Presser Foot Pressure.
> Balance the Thread Tension.
> Use high quality thread.
Irregular stitches
> Balance the Thread Tension.
> Check for tangled or caught thread.
> Check the threading path.
Fabric puckers
> Check the setting of the Differential Feed.
> Loosen the Thread Tension.
> Check for tangled or caught thread.
> Use high quality thread.
> Shorten the stitch length.
> Decrease the Presser Foot Pressure for lightweight fabrics.
Irregular trimming
> Check the alignment of the Knives.
> Replace one or both Knives.
Fabric piles up
> Reduce the Presser Foot Pressure.
> Check the setting of the Differential Feed.
> Check for tangled or caught thread.
> Compress/Baste thick layers of fabric with a conventional
machine before sewing with the Overlocker.
Machine not running
> Connect machine to the power source and switch it on.
> Close the Looper cover.
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