4. SEWING
4-5-4. Adjusting the thread tension spring
・
Operating range of thread take-up spring
The standard operating range for thread take-up
spring L
q
and thread take-up spring R
w
is 6 - 10
mmfor both springs.
<
Thread take-up spring L
q
>
1. Loosen the left and right screws e, and then turn the
left and right thread take-up spring stoppers r to
adjust the operating range.
NOTE: The screws
e
and the thread take-up spring
stoppers are integrated.
2. Tighten the screws.
<
Thread take-up spring R
q
>
1. Loosen the screw
r
and then move the thread take-
up spring stopper left or right to adjust.
2. After adjusting, tighten the screw
r
.
・
Thread take-up spring tension
The standard tension for thread take-up spring L
q
and thread take-up spring R
w
is 1.08-1.96 N(110gf-
200gf) for both sprnings.
NOTE: The thread take-up spring tension is the ten-
sion which is applied by the thread take-up
spring when it is horizontal to the lower end of
the arm thread hook.
<Thread take-up spring L
q
>
1. Loosen the set screw
e
.
2. Loosen the knob
r
, and then turn the thread tension
stud
t
to adjust the tension.
3. Tighten the set screw
e
, and then tighten the knob
r
.
<Thread take-up spring R
w
>
1 Loosen the set screw
y
.
2. Loosen the knob
r
, and then turn the thread tension
stud
u
to adjust the tension.
3. Tighten the set screw
y
, and then tighten the knob
r
.
―
29
―
BAS-705
q
w
e
t
r
u
r
y
1.08-1.96N
Weaker
Stronger
Stronger
Weaker
q
w
r
e
6-10mm