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4-5. Installing the bobbin
CAUTION
:
Turn O�� the power before starting the work so as to prevent accidents caused by abrupt
start of the sewing machine.
4-6. Adjusting the thread tension
Short
Adjusting the needle thread tension
A
2.5 cm
4
5
3
1
2
1
Long
2
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 re-
sult in an inconsistent state.
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
not slipped off.
(The standard length of thread remaining on the
needle is approximately 4 cm.)
The needle thread tension is adjustable on the op-
eration panel. The bobbin thread tension is adjust-
able by means of 2 .
The needle thread tension to be applied to the
bartacking sections can be set by means of thread
tension setting button A on the operation panel.
– 17 –
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