Installing The Bobbin; Adjusting The Thread Tension; Adjusting The Thread Take-Up Spring - JUKI K-1E Instruction Manual

5. Installing the bobbin

5.Installing the bobbin
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by
abrupt start of the
Caution!
If the bobbin is installed in the bobbin case orienting the reverse direction, the bobbin thread
pulling out will result in an inconsistent state.

6. Adjusting the thread tension

6.Adjusting the thread tension

7. Adjusting the thread take-up spring

7.Adjusting the thread take-up spring
1)Set the bobbin ❶ into bobbin case ❷ in the
di- rection shown in the figure.
2)Pass the thread through thread slit ❸ of
bobbin case ❷ , 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 ❹ .
3)Pass the thread through thread hole ❺ of the
horn section, and pull out the thread by 25mm
from the thread hole.
If thread tension controller No. 1 ❶
is turned clock-wise, 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 not slipped off.
Adjust needle thread tension from the
operation panel and bobbin thread
tension with ❷
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.
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