Brother BAS-6150, Instruction Manual

Page: 27 / 107

Chapter 1 Machine Preparation
BAS-6150
25
4-8. Adjusting the thread tension spring
4-8-1. 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 5-10mm for both springs.
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.
2. Tighten the screws
e
.
4-8-2. Thread take-up spring tension
The standard tension for thread take-up spring
L
q
and thread take-up spring R
w
is 0.15-
0.35N for both springs.
<Thread take-up spring L
q
>
1. Open the face plate.
2. Loosen the screw
t
.
3. Loosen the knob
y
, and then turn the
thread tension stud
u
to adjust the tension.
4. Tighten the screw
t
, and then tighten the
knob
y
.
<Thread take-up spring R
w
>
1. Loosen the set screw
i
.
2. Loosen the knob
y
, and then turn the
adjustment knob
o
to adjust the tension.
3. Tighten the screw
i
, and then tighten the
knob
y
.
4-8-3. Thread take-up spring operation timing
The standard operation timing for thread take-
up spring L
q
and thread take-up spring R
w
is the middle position within the operating
range of the thread take-up spring guide
!0
.
1. Loosen the set screw
!1
.
2. Loosen the knob
y
, and then turn the left
and right thread take-up spring guides
!0
to adjust the tension.
3. Tighten the screw
!1
, and then tighten the
knob
y
.
1632S 1633S
1634S
1635S
1636S
1637S
q
w
5-10mm
r
e
Less
More
0.15-0.35N
q
w
q
Stronger
Weaker
Weaker
Stronger
t
u
i
y
o y
w
<L >
q
<R >
w
q w
!0
!1
!0
!1
y
Later
Earlier