5-6-2. Lower thread tension
I
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
0 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.
5. Correct use
5-6-3. Upper thread tension
Turn the tension nut 8 (main tension)
to
adjust the ten-
sion as appropriate for the material being sewn.
Furthermore, turn the thread nut
8 (sub-tension) to ad-
just the remaining length of upper thread to
35-40
mm.
5-6-4. Thread take-up spring height 5-6-5. Thread take-up spring tension
Loosen screw 0 and turn the entire thread take-up unit Adjust the thread take-up spring tension
by
turning the
to adjust so that the height of the thread take-up spring is tension stud
0 with a screwdriver.
8-10mm.
BAS-341 E • 342E
13
To Next Page
Loading...
