4-6. Thread Tension Adjustment
Set the balance of the tension as weak as possible. To tighten the tension, turn tension dial to a higher number.
To loosen the tension, turn tension dial to a lower number.
®Left needle thread tension © Right needle thread tension © Upper looper thread teqsion
Lower looper thread tension
(1) Correct tension.
•Lower looper thread and upper thread should be well balanced with same tension. (Both looper threads should make crosses at the edge of the fabric.)
•Needle thread should not be slacken, or pulled.
(2)Unbalanced upper looper thread wraps round and over the back:
Tighten the thread tension of the upper looper (Dial
©)or loosen the thread tension of the lower looper (Dial ©).
looper
thread
Right needle thread
Upper looper thread