Adjusting The Thread Take-Up Spring; Operation Of The Sewing Machine (Basic); Selection Of Language - JUKI LK-1900S Series Instruction Manual

4-7. Adjusting the thread take-up spring

❹
❸

5. OPERATION OF THE SEWING MACHINE (BASIC)

Set each item following the procedure described below.

5-1. Selection of language

❶
❷
3.5 mm
❾
The standard stroke of thread take-up spring ❶ is 8
to 10 mm, and the pressure at the start is 0.1 to 0.3N.
1) Adjusting the stroke
Loosen setscrew ❷ , and turn thread tension
asm. ❸ .
Turning it clockwise will increase the moving
amount and the thread drawing amount will in-
crease.
2) Adjusting the pressure
To change the pressure of the thread take-up
spring, insert a thin screwdriver into the slot of
thread tension post ❹ while screw ❷ is tightened,
and turn it. Turning it clockwise will increase the
pressure of the thread take-up spring. Turning it
counterclockwise will decrease the pressure.
In the case you have adjusted the amount
of travel of the thread take-up spring ❶ ,
check the dish of the thread tension cou-
pled body is closed.
It may cause sewing defects.
When you turn ON the power to the sewing machine
for the first time after the purchase, the language
selection screen is displayed. Select the language to
be displayed, then press RETURN key
The language to be displayed on the screen can
be changed by means of the memory switch U239
"Language selection". Refer to
THE MEMORY SWITCH" p.58
the memory switch.
If you terminate the language selection by
pressing RETURN key
lecting the language, the language selection
screen will be displayed every time you turn
ON the power to the sewing machine.
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17
❾ .
"I.8. HOW TO USE
for the details of
❾ without se-