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Stop position after thread trimming
(1) The standard needle stop position is obtained by aligning marker dot
on the pulley cover with white marker dot
A
(2) Stop the needle in UP position, turn OFF the power, and loosen
screw
to perform adjustment within the slot of the screw. The
needle stop timing is advanced if you move the screw in the direction
of
.
C
The needle stop timing is delayed if you move the screw in the
direction of
.
D
(Caution) Do not operate the machine with screw
loosen the screw, and do not remove it.
Lower stop position
(1) When the pedal is moved from front part depression to neutral, the
lower stop position of the needle
where the needle
needle hole coincides with the upper surface of the feed dog.
(2) Like stoppage in UP position, stop the needle
turn the power OFF, and loosen the screw
oblong hole. The needle stop motion is fastened if the screw is moved
in the direction of
(Caution) Do not operate the machine with screw
loosen the screw, and do not remove it.
Adjustment Procedure
will be located in the section
thrusts the feed dog and the upper end of the
, and delayed if it is moved in
E
on the handwheel.
B
loosened. Just
in DOWN position,
within the range of the
.
F
loosened. Just
– 35 –
Results of Improper Adjustment
A
Early
o If the needle-up stop position of
the sewing machine is not
p r o p e r l y a d j u s t e d , t h r e a d
trimming failure will result. The
cam roller will not come off the
thread trimming cam at the time
of thread trimming, but will come
off from the cam at the start of
next sewing with a noise.
o The timing to detect the needle-
down stop position of the sewing
machine should be advanced the
most. If the timing is retarded,
troubles will result such that the
thread trimmer fails to cut the
thread, reverse-feed stitches
may not to be sewn accurately
on the normal-feed stitches at the
time of automatic reverse
stitching or the needle thread will
be insufficiently tensed at the
corner of a material at the time
of sewing the corner.
A
Late
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