How To Adjust The Thread Tension - JUKI APW-896N/IP-420 Basic Operation Manual

6. HOW TO ADJUST THE THREAD TENSION

Bobbin case
Bobbin
Bobbin thread
tension adjustment
screw
❶
❷
− 7 −
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 0.25 to 0.35N when
measuring with the tension gauge.
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 ❶ and
❷ respectively. Turning the nuts clockwise will
increase the thread tension or turning them
counterclockwise to decrease it.