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[Type I]
1. When the thread trimmer solenoid is pulled, the amount of protrusion
is 0.7mm to 1.3mm between the tip
of the thread trimming shaft
and the end plane of the bed.
(Caution) Confirm that a clearance is secured between the cam
follower piece and the end plane of the thread
trimming cam to 2mm. (Refer to 3.-(11)-1).)
2. The support rubber of the stopper plate should be made to
contact so that it clogs the thread trimming shaft hole of the bed.
(Move the bed stud A to secure a light contact.)
[Type II]
1. When the thread trimmer solenoid is pulled, the amount of protrusion
is 1.2mm to 1.8mm between the tip of the thread trimming shaft
and the end plane of the bed.
(Caution) Confirm that a clearance is secured between the cam
follower piece and the end plane of the thread
trimming cam to 2mm. (Refer to 3.-(11)-1).)
* At the time of thread trimming stopper assembly, this work should
be carried out in the center of the oblong hole in the bed stud A.
Adjustment Procedure Results of Improper Adjustment
o If the amount of protrusion is too
small, the action sound of the
thread trimmer becomes large.
o If the amount of protrusion is too
large, the amount of picker action
becomes small and the lost
motion of bobbin may occur.
(If the amount of protrusion is too
excessive, short cutting of the
needle thread may arise. This is
because the needle thread is
disengaged from the picker.)
o If the amount of protrusion is too
small, the action sound of the
thread trimmer becomes large.
o If the amount of protrusion is too
large, the amount of picker action
becomes small and the lost
motion of bobbin may occur.
(If the amount of protrusion is too
excessive, short cutting of the
needle thread may arise. This is
because the needle thread is
disengaged from the picker.)
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