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Description of
error
① Obstacles such as dust, etc.
Bobbin-thread
winding is not
gather on the moving section.
carried out nor-
② Thread of the bobbin thread
mally.
cone has run out during wind-
ing of a bobbin.
③ Thread has broken during
winding of a bobbin.
④ Thread wound on the bobbin
overflows from the bobbin
flange.
⑤ Bobbin fails to rotate.
⑥ Thread slips out of the roller of
bobbin thread feeding unit.
⑦ Bobbin thread feeding unit fails
to operate.
⑧ Thread has tangled on the
thread stand, etc. since the
thread has vibrated excessive-
ly halfway through threading
route.
⑨ Thread type and yarn count do
not conform to the specifica-
tions.
Cause
○ Carry out maintenance referring to
○ Put the bobbin thread cone in place.
○ Referring to
○ Check the setting of bobbin-thread winding length.
○ Check whether or not the thread used in the previous
○ Referring to
○ If the thread tension is not sufficient, thread may
○ Check whether or not the connector, air tube, etc.
○ Check the threading route referring to
○ Change the thread with another thread the type
– 40 –
Error handling procedure
p.35.
"3-3. How to thread the device with
the bobbin thread"
p.7, check the thread ten-
sion.
sewing still remains on the bobbin.
"3-4. How to set a bobbin"
check whether or not the bobbin is fitted in the bob-
bin case correctly.
slip off the roller. Check the thread tension.
coming from the bobbin thread feeding unit are
correctly connected.
to thread the device with the bobbin thread"
p.7. In particular, the roller and actuating arm,
etc. of the bobbin thread feeding unit are threaded
correctly.
and yarn count of which conform to the specifica-
tions.
"4-2. Cleaning"
p.9,
"3-3. How
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