– 15 –
15. THREAD TENSION
(1) Adjusting the needle thread tension
1) Turn thread tension nut No. 1
❶
clockwise (
A
)
to shorten the length of thread remaining on the
top of needle after thread trimming. Turn the nut
counterclockwise (
B
) to lengthen it.
2) Turn thread tension nut No. 2
❷
clockwise (
C
)
to increase the needle thread tension, or counter-
clockwise (
D
) to decrease it.
(Caution) Apply the same tension to both of the
thread tension nut No. 2
❷
.
WARNING :
To protect against possible personal inju
-
ry due to abrupt start of the machine, be
sure to start the following work after turn
-
ing the power off and ascertaining that the
motor is at rest.
(2) Adjusting the bobbin thread tension
1) Turn tension adjustment screw
❸
clockwise (
E
)
to increase the bobbin thread tension, or counter-
clockwise (
F
) to decrease it.
C
❶
A
B
❷
D
F
E
❸
❶
❷
❺
❹
❸
Decrease
Increase
16. THREAD TAKE-UP SPRING
(1) When you want to change the stroke of the spring :
1) Loosen screw
❷
in the stopper, and move stop-
per
❸
to the right or left to change the stroke of
thread take-up spring
❶
.
2) Move the stopper
❸
to the right to increase the
stroke of the thread take-up spring, or the left to
decrease it.
(2) When you want to change the tension of the spring :
1) Loosen nut
❹
, and turn spring stud
❺
counter-
clockwise to increase the tension of the spring, or
clockwise to decrease it.
17. HAND LIFTER
1) When you want to keep the presser foot in the
lifted position, lift hand lifter
❶
in the direction of
the arrow.
This makes the presser foot rise 9 mm and stay
at that position.
2) To make the presser foot come down to its home
position, lower the hand lifter
❶
.
❶
Содержание LU-1520NCS-7
Страница 1: ...LU 1520NCS 7 INSTRUCTION MANUAL ...
