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Adjustment Procedures Results of Improper Adjustment
Adjustment Procedures Results of Improper Adjustment
1. Loosen setscrew 5 in the spreader driving gear, and turn thrust
collar 6 clockwise to delay spreader timing. Turn it
counterclockwise to advance the timing. Tighten setscrew 5
at the timing when the loop is sent well to the hook needle.
(Caution) When tightening setscrew 5 in the gear, the torque
is increased when the play in the spreader crank
shaft is excessively small, and the play occurs at
the top end of the spreader when the play is
excessively large.
Stretch thread between section A of spreader 1 and section B
of the looper, and hook thread on hook needle 2. Turn by hand
the sewing machine to perform two to three stitches, and confirm
the loop which is made on the needle top.
1. Adjust so that when the loop of needle thread is hooked on
thread groove B by looper 3, simultaneously top end C of
spreader 1 catches the thread.
2. When the loop is large and the thread cannot be caught on
thread groove B of looper 3, advance the timing of spreader
1.
3. On the contrary, when the loop is small and the thread cannot
be caught on thread groove B of spreader 3, delay the timing
of spreader 1. Adjust so that spreader 1 securely catches
the loop and carries it to hook needle 2.
(Caution) After performing adjustment related to looper 3
and spreader 1, be sure to turn the handwheel by
hand and operate the machine after checking that
the respective parts do not come in contact with
each other.
™ Stitch skipping will occur when
the loop at the needle top is large
or small.
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