Brother BAS-761 Thread tension, Thread take-up spring X2.4 rotary hook X1.7 rotary hook

5. Correct operation

5-5. Thread tension

qr

Stitches when upper thread tension is too low

Stitches when upper thread tension is too high

Correct stitches

■x2.4 rotary hook

e

■ x2.4 rotary hook	■ x1.7 rotary hook
w	w	■ x1.7 rotary hook
Low	Low	e
High	High

1.When the thread take-up lever is in the highest position after thread trimming, adjust the upper thread beyond the needle eye so as it is 30 to 40 mm long, by turning tension nut q. (30 - 70 g is standard).

2.Adjust the lower thread tension by turning tension regulating screw w. (40 - 60 g is standard.)

3.Adjust the upper thread tension by turning tension nut e and r after lowering the presser foot.

Note:

Then adjust the tension 30 - 40 g by turning tension nut r. Main adjust is performed by using tension nut e.

(x2.4 rotary hook 150 - 200 g is standard. ) x1.7 rotary hook 200 - 220 g is standard.

■Thread take-up spring

■x2.4 rotary hook

e

■ x1.7 rotary hook

e

30 - 60g

w

40 - 80g

qq

5 - 8mm

1.The standard height of the thread take-up spring q is when the stroke is 5 to 8 mm.In addition, the standard tension in the thread take-up spring is 30 g to 60 g (x1.7 rotary hook 40 - 80g).

(The tension in the thread take-up spring when it is pulling the upper thread straight to the side at the point where the spring starts to move.)

2.To adjust the thread take-up spring height, loosen set-screw w and turn the whole unit of the tension regulator assembly.

3.To adjust the thread take-up spring force, insert a screwdriver tip into the groove of tension stud e and turn it as much as is appropriate.

BAS-761 12