Attachment
111
11.2 Troubleshooting
Fault Cause Repair
Uneven stitch formation
Upper thread too tight or too
loose.
> Adjust the upper thread tension.
Needle blunt or bent. > Replace the needle, make sure that a new BERNINA
quality needle is used.
Poor quality needle. > Use a new BERNINA quality needle.
Poor quality thread. > Use quality thread.
Incorrect needle/thread
combination.
> Match the needle with the thread size.
Incorrectly threaded. > Rethread.
The fabric has been pulled. > Feed the fabric evenly.
Uneven stitch formation
Incorrect bobbin case is used. > Use the supplied bobbin case with triangles.
Skipped stitches
Incorrect needle. > Use the needle system 130/705H.
Needle blunt or bent. > Replace the needle.
Poor quality needle. > Use a new BERNINA quality needle.
The needle is incorrectly inserted. > Insert the needle with the flat side to the back as far up
as it will go into the needle holder and tighten the
screw.
Incorrect needle point. > Match the needle point to the texture of the material.
Faulty stitching
Thread remnants between the
thread tension discs.
> Fold a piece of thin material and slide the folded edge
(not the raw edges) between the thread tension discs.
Incorrectly threaded. > Rethread.
Thread remnants below the
bobbin case spring.
> Remove the thread remnants under the spring.
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