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4. PREPARATION BEFORE SEWING
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29
KE-430F, BE-438F
4-4. Installing the bobbin case
CAUTION
Turn off the power switch before installing the bobbin case, otherwise the machine may operate if the foot switch is
depressed by mistake, which could result in injury.
1. Pull the shuttle race cover (1) downward to open it.
2. While holding the bobbin so that the thread winds to the right, insert the bobbin into the bobbin case.
3. Pass the thread through the slot (2) and pull it out from the thread hole (3).
4. Check that the bobbin turns in the direction of the arrow when the thread is pulled.
5. Pass the thread through the lever thread hole (4), and then pull out approximately 30 mm of thread.
6. Hold the latch on the bobbin case and insert the bobbin case into the rotary hook.
4-5. Thread tension
4-5-1. Lower thread tension
Adjust the thread tension to the weakest possible tension by
turning the thread tension nut (1) until the bobbin case will
not drop by its own weight while the thread end coming out
of the bobbin case is held.
4433Q
2534Q
2535Q
30mm
2536Q
weaker stronge
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