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1
6. HOW TO ADJUST THE THREAD TENSION
Bobbin
Bobbin case
Bobbin thread
tension adjustment
screw
2
Adjusting needle thread tension
First, adjust the right- and left-hands bobbin
thread tension.
Then in accordance with the bobbin thread
tension obtained, adjust the right- and
left-hand sides needle threads tension
appropriately by turning thread tension
adjustments nuts
1
and
2
respectively.
Turning the nuts clockwise will increase
the thread tension or turning them
counterclockwise to decrease it.
1
Adjusting bobbin thread tension
Turn bobbin thread tension adjustment screw
clockwise to increase the bobbin thread
tension or turn the screw counterclockwise to
decrease it.
As shown in the left-hand figure, standard
bobbin thread tension is 0.5 to 0.5N when
measuring with the tension gauge.