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Trouble Cause (1) Cause (2) Checking order and adjusting procedure Page
5. Start pedal fails to start. (Presser
lifting lever has not fully returned.)
5-1) Return of bobbin thread trimmer
driving arm is improper.
5-2) Mismatch of starting safety arm
and presser lifting lever
5-3) Return of starting safety lever
is improper.
5-4) Needle thread trimmer is
mismatched.
1)-A Throat pate, throat plate base
and bobbin thread trimmer are
clogged with foreign matters
such as lint or the like.
1)-B Mismatch of bobbin thread
trimmer lever and bobbin thread
trimmer ball screw.
1)-C Operation of bobbin winder trip
latch is improper.
2)-A Clearance provided between
starting safety arm and presser
lifting lever is too small.
3)-A Clearance provided between
starting safety lever and spring
of stop-motion solenoid is
improper.
4)-A Needle thread trimmer comes
in abnormal contact with
presser and actuating plate.
Remove work clamp carrier and clean around the throat plate.
Adjust the length of bobbin thread trimmer ball screw.
Apply grease.
Re-adjust the bobbin winder trip latch.
Refer to the item (27) of STANDARD ADJUSTMENT.
Adjust the clearance to 0.3 to 0.8cmm.
Adjust the clearance to 0.5 to 1 mm.
Refer to the items (19), (20) and (21) of STANDARD ADJUSTMENT.
(Adjusting the needle thread trimmer)
(See page 16.)
(See page 20.)
(See pages 22 to 25.)
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