JUKI APW-895 Engineer's Manual page 27

1. When changing the amount of motion for the thread take-up spring
(1) To adjust the right thread take-up spring
tension setscrew
to the right and left.
(2) To adjust the left thread take-up spring
tension setscrew
the right and left.
(3) When the second thread tensions (asm.)
right, the thread take-up amount (stroke) is increased. When it is
turned to the left, the thread take-up amount becomes small.
(4) Make sure that the strokes of the thread take-up springs
are 14 ± 2 mm when the thread is pulled downward.
(Caution) When the second thread tension setscrews
(right) are loosened, the amount of disk floating may
become change. Check "18) Adjustment of floating
amount of the thread tension disk" again.
2. When changing the strength of the thread take-up spring
(1) When changing the strength of the right thread take-up spring
turning the spring shaft
and turning it to the left causes the strength to decrease.
(2) When changing the strength of the left thread take-up spring
turning the spring shaft
and turning it to the left causes the strength to decrease.
Standard adjusting values
(3) Make sure that the tensions of the thread take-up springs
are 0.25 N (25g) when the thread is pulled 1 mm sideward and
slightly upward.
Adjustment Procedures
and turn the second thread tension (asm.)
, loosen the second thread
and turn the second thread tension (asm.)
to the right causes the strength to increase
to the right causes the strength to increase
, loosen the second thread
and are turned to the
and
(left) and
and
– 22 –
Results of Improper Adjustment
to
,
,