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4-7. Adjusting the thread take-up spring and the thread breakage detector plate
4-8. Adjusting the thread take-up stroke
1) Remove needle bar rotating motor cover
❼
.
2) Adjusting the stroke
Loosen setscrew
❷
and turn thread ten-
sion controller
❸
. Turning it clockwise will
increase the stroke of thread take-up spring
❶
and, thereby, will increase the thread
drawing amount.
3) Adjusting the pressure
To change the pressure of thread take-up
spring
❶
, insert a thin screwdriver into the
slot of thread tension post
❹
while setscrew
❷
is tightened, and turn it. Turn it clockwise
to increase the pressure of thread take-up
spring
❶
, or counterclockwise to decrease
it.
4) Adjusting the thread breakage detector plate
Loosen setscrew
❻
. Adjust the position
of thread breakage detector plate
❺
so
that the amount of contact between thread
breakage detector plate
❺
and thread take-
up spring
❶
is 0 to 0.2 mm.
1) When sewing heavy-weight materials, move
thread guide
❶
to the left (in direction
A
) to
increase the length of thread pulled out by the
thread take-up.
2) When sewing light-weight materials, move thread
guide
❶
to the right (in direction
B
) to decrease
the length of thread pulled out by the thread take-
up.
3) Normally, thread guide
❶
is positioned in a way
that the center of elongated hole is aligned with
the center of the screw.
❷
❷
❸
❸
❻
❻ ❺
❺
❹
❹
❶
❶
❼
❼
B
B
A
A
❶
❶
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
Содержание PS-900-13090
Страница 1: ...PS 900 13090 INSTRUCTION MANUAL...