Owner's Manual

BAS-343E

5. Correct use

5-6-2. Lower thread tension

5-6-4. Thread take-up spring height

5-6-3. Upper thread tension

Turn the tension nut w (main tension) to adjust the ten-

sion as appropriate for the material being sewn.

Furthermore, turn the thread nut e (sub-tension) to ad-

just the remaining length of upper thread to 35 - 40 mm.

5-6-5. Thread take-up spring tension

Adjust the thread take-up spring tension by turning the

tension stud t with a screwdriver.

Loosen screw r and turn the entire thread take-up unit

to adjust so that the height of the thread take-up spring is

8 - 10 mm.

Set the lower thread tension to as weak a tension as pos-

sible and so that the bobbin case drops by its own weight

when the end of the thread is held. Turn the adjusting

screw q to adjust the tension.

NOTE

If the lower thread tension is too weak, it may not

be possible to cut the lower thread properly during

thread trimming.

Weaker

Stronger

Weaker

Stronger

Weaker

8 - 10 mm

Higher

Lower

Stronger

Weaker