Adjusting The Thread Take-Up Spring; Example Of The Thread Tension; Operation Of The Sewing Machine (Basic); Selection Of Language - JUKI LK-1900B series Instruction Manual

4-7. Adjusting the thread take-up spring

❹
❸

4-8. Example of the thread tension

When using the sewing machine for the first time, adjust the thread tension referring to the table below.
Thread
Polyester filament thread #50
Polyester spun thread #50
Polyester spun thread #60
(Thread clamp OFF)
Cotton thread #50
Cotton thread #20

5. OPERATION OF THE SEWING MACHINE (BASIC)

Set each item following the procedure described below.

5-1. Selection of language

❶
❷
Material Needle thread tension
setting
Wool 30 to 35
Wool 50 to 55
T/C broad 30 to 35
Denim 35 to 45
Denim 35 to 45
❾
－
16
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.
Thread take-up spring moving
amount [Thread drawing amount]
10mm [13mm]
10mm [13mm]
8 to 10mm [11 to 13mm]
10mm [13mm]
8 to 10mm [11 to 13mm]
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.51
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.
－
Strength
0.1N
0.2N
0.1N
0.1N
0.1N
❾ .
"I.8. HOW TO USE
for the details of
❾ without se-