－
16
－
1) Open hook cover
❶
.
2) Raise latch
❸
of bobbin case
❷
, and remove
the bobbin case.
3) When installing the bobbin case, fully insert it
into the shuttle shaft, and close the latch.
4-4. Installing and removing the bobbin case
❶
❷
❸
If it is not fully inserted, bobbin case
❷
may slip off during sewing.
1) Set the bobbin
❶
into bobbin case
❷
in the
direction shown in the gure.
2) Pass the thread through thread slit
❸
of bob-
bin 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 25 mm
from the thread hole.
4-5. Installing the bobbin
❶
❷
❺
❹
❸
25 mm
If the bobbin is installed in the bobbin
case orienting the reverse direction,
the bobbin thread pulling out will result
in an inconsistent state.
4-6. Adjusting the thread tension
Long
Short
If thread tension controller No. 1
❶
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 needle thread tension is to be adjusted with
thread tension combination
❸
. The bobbin thread
tension is to be adjusted with
❷
.
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
❷
❶
❸
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