– 72 –
Troubles Causes Checking Corrective measures
Both needle and bobbin
thread cannot be
trimmed.
The blades of moving
knife and counter knife
have been improperly
adjusted.
Counter knife pressure is
excessively low.
Moving knife fails to work.
Presser foot drops from
cloth at the time of thread
trimming.
Refer to "(22)-4) Adjusting the
knife pressure".
Refer to "(22)-4) Adjusting the
knife pressure".
Refer to "Adjusting the
synchronizer timing".
Refer to "(22)-5), and 6) "Thread
trimmer cam and THread trimmer
cam timing".
Air pressure is excessively low.
Adjust the air pressure (Adjust it
to 0.5 Mpa or more.)
Replace the thread trimmer
solenoid.
Perform thread trimming on cloth.
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