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8.1.6) LOWER THREADING AND TENSION
ADJUSTMENT
1) Lower threading
– Use cotton yarn (#80-#120) for your lower
thread.
– Lower threading into the bobbin case
Insert the bobbin into the bobbin case with
the thread coming out from the case slot.
Pull the thread through the thread guide.
– To prevent lower thread tangles, trim the
thread, leaving the length at 3-4cm, before
inserting the bobbin into the hook.
2) Lower thread tension adjustment
Adjust the tension of the lower thread using the
bolt on the tension spring of the bobbin case.
Turn the bolt clockwise to increase the tension
and counterclockwise to decrease the tension.
3~4cm
Lower threading
Slot
Bobbin
Fixing bolts
Tension spring
Thread guide
Bobbin case
driver
Make sure the bobbin rotates clockwise when you pull the thread holding the bobbin case in
your left hand.
CAUTION
To check if the lower thread tension is adequate, hold the thread from the bobbin and jiggle the
bobbin case lightly up and down. The thread should come out from its own weight and the
tension should be 25-35g.
CAUTION
Summary of Contents for MA-6
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