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Errors and faults
Fault
Skipped stitches
Faulty stitching
Upper thread breaks
Lower thread breaks
174
Cause
Incorrect needle.
Needle blunt or bent.
Poor quality needle.
The needle is incorrectly inserted.
Incorrect needle point.
Thread remnants between the
thread tension discs.
Incorrectly threaded.
Thread remnants below the
bobbin case spring.
Incorrect needle/thread
combination.
Upper thread is too tight.
Incorrectly threaded.
Poor quality thread.
The stitch plate or the hook tip is
damaged.
The thread is caught in the area
of the thread take-up lever.
1
The bobbin case is damaged.
The stitch hole in the stitch plate
is damaged.
Needle blunt or bent.
Solution
> Use the needle system 130/705H.
> Replace the needle.
> Use a new BERNINA quality needle.
> 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.
> Match the needle point to the texture of the material.
> Fold a piece of thin material and slide the folded edge
(not the raw edges) between the thread tension discs.
> Rethread.
> Remove the thread remnants under the spring.
> Match the needle with the thread size.
> Reduce the upper thread tension.
> Rethread.
> Use quality thread.
> Contact the nearest specialized BERNINA dealer to have
the damages repaired.
> Replace the stitch plate.
> Remove the screw (1) on the headframe with the
angular Torx Screwdriver.
> Pull the headframe at the bottom slighty forward.
> Flip the headframe upwards a bit and remove it.
> Remove the thread remnants.
> Attach the headframe and tighten the screw.
> Replace the bobbin case.
> Contact the nearest specialized BERNINA dealer to have
the damages repaired.
> Replace the stitch plate.
> Replace the needle.
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