145
PROBLEM TIP or PAGEREMEDYPROBABLE CAUSE
Skipped stitches.
Stitches pull out of
material.
Needle Breaks.
Readjust the upper and
lower thread tension.
If the problem is only on the
lower thread. Replace the
bobbin or the bobbin case.
Select the proper thread for
the job.
Adjust the take-up spring
stroke and tension.
Replace the tension spring
on the presser foot.
Adjust upper thread tension.
Clean discs of the pre-
and main tensioners.
Adjust bobbin thread
tension.
Clean the bobbin case,
being careful to clean any
lint from under the
adjustment spring.
Use good quality thread.
Adjust the timing.
Oil the raceway of the hook
assembly.
Replace the needle.
Buy good needle.
Frequent stops in the supply
of the upper and lower
thread.
The thread is too thick or
has too much stretch.
Take-up spring is adjusted
incorrectly resulting in
tension that is too tight.
Fabric moves in the hoop
when the needle enters or
exits because the tension of
the presser foot is too weak
or the tension spring on the
presser foot is damaged.
Upper thread tension is too
loose.
Upper thread is dirty which
is affecting the tension.
Lower thread tension is too
loose.
Uneven bobbin tension.
Thread is too thick.
Incorrect timing between
the needle and the hook.
Not enough oil in the
raceway of the hook.
Needle is bent.
Needle is poor quality.
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