Thread tension
Adjusting the thread tension
Turn tension dials by only half or one number then test
sew again and check the results.
The loops are formed on the underside;
Tighten the upper lower thread tension, blue or loosen
the lower looper tension, red (A).
The loops are formed on the upper side;
Tighten the lower looper thread tension, red or loosen
the lower looper tension, blue (B).
The right-hand needle thread forms loops on the
underside;
Tighten the right-hand needle thread tension, green (C).
The left-hand needle thread forms loops on the
underside;
Tighten the left-hand needle thread tension, yellow (D).
The edge of the fabric curls up; tension of both looper
threads is too tight;
Loosen upper and lower looper thread tension, blue and
red (E).
The fabric puckers during sewing;
Loosen the right or left-hand needle thread tension,
green or yellow (F).
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