Installing The Bobbin; Adjusting The Thread Tension - JUKI AMS-210EN/IP-420 Instruction Manual

4-6. Installing the bobbin

WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start or
the sewing machine.

4-7. Adjusting the thread tension

Adjusting the needle thread tension
2.5 cm
4
5
3
1 2
6
1
Longer
Shorter
A
1) Set the bobbin 1 into bobbin case 2 in the
direction shown in the figure.
2) Pass the thread through thread slit 3 of bob-
bin case 2 , and pull the thread as it is. By so
doing, the thread will pass under the tension
spring and be pulled out from thread hole 4 .
3) Pass the thread through thread hole 5 of the
horn section, and pull out the thread by 2.5 cm
from the thread hole.
If the bobbin is installed in the bobbin
case orienting the reverse direction, the
bobbin thread pulling out will result in an
inconsistent state.
* If the bobbin thread tension is not consistent due
to thread overflow in the hook resulting from bob-
bin idling or other problem, bend claw 6 of the
bobbin case slightly inward. This can prevent the
bobbin from idling.
If thread tension controller No. 1 1 is turned
clockwise, the length of remaining thread on the
needle after thread trimming will be shorter. If it is
turned counterclockwise, the length will be longer.
Shorten the length to an extent that the thread is
2
not slipped off.
Adjust needle thread tension from the operation
panel and bobbin thread tension with 2 .
1) Select THREAD TENSION button
A in the sewing screen.
2) Set a needle thread tension using
PLUS/MINUS (+/–) button B . There is a
setting range of 0 to 200. When the set
value is increased, the tension becomes
B B
higher.
* When the set value is 50 at the time of
standard delivery, the thread tension is
adjusted so that H type is 2.35N and S
type is 1.47N (spun thread #50).
(When thread tension No. 1 is released.)
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