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Troubles Causes Checking Corrective measures
2. Stitch skipping Clearance between the
needle and the blade point
of hook is too large.
Needle-to-hook timing is
excessively advanced or
retarded.
Presser foot is rising.
(Pressure of the presser
foot is too low.)
Height of the needle bar is
improper.
Blade point of the hook is
blunt.
Improper type of needle is
used.
Hook needle guard is not
functioned.
Thread take-up spring
works excessively or the
stroke of the spring is too
small.
Feed timing is not proper.
Check the clearance.
Check the specified dimension.
Check the pressure of the
presser foot.
Check the lowest point of
the needle bar.
Check the blade point of the
hook.
Check the functional
amount of the needle guard.
Refer to “Needle-to-hook
timing” on page 9.
Refer to “Needle-to-hook
timing” on page 9.
Tighten the presser spring
regulator.
Refer to “Needle-to-hook
timing” on page 9.
Correct the blade point or
replace the hook.
Replace the needle with one
which is thicker than the current
needle by one count.
Refer to “Needle-to-hook
timing” on page 9.
Decrease the tension of the
spring and increase the stroke
of the spring.
Refer to “Main shaft-to-hook
driving shaft timing” on page 11.
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