Brother LK3-B448E Manual De Usuario
LK3-B448E MARK
II
/BA-16
10. Adjustment
44
2
±
0.5mm
q
w
e
(Approx.
30mm)
30mm)
Approx.
20mm
20mm
r
t
10-12. Adjusting the needle up stop position
The needle up stop position is adjusted so that the index
mark
mark
w
on the machine pulley
q
is inside the mark
r
on the belt cover
e
.
If adjustment is necessary, loosen the screw
t
at the “U”
mark of the machine pulley
q
and adjust the position of
the machine pulley
q
. The machine pulley
q
stops later
if it is turned clockwise, and it stops earlier if it is turned
counterclockwise.
counterclockwise.
NOTE:
The screw
y
at the “D” mark is an adjusting screw for the
needle down detection function and is adjusted to match the
feed timing, so it should not be loosened.
The screw
feed timing, so it should not be loosened.
The screw
u
is a screw for detecting the machine stop posi-
tion, and should not be loosened.
* If the index mark
w
is not inside the mark
r
when the
sewing machine is started, error code [E-50] will be dis-
played. Turn the machine pulley to move the index mark
played. Turn the machine pulley to move the index mark
w
to the correct position and then start the sewing
machine.
10-13. Adjusting the thread wiper
1. Loosen the set screw
w
and move the wiper arm support
e
up or down to adjust so that the clearance between
the top of the thread wiper and the needle point
q
is 2
±
0.5 mm when the thread wiper is aligned with the center
of the needle.
* Before carrying out this adjustment, check that the needle bar is lowered 3.5 to 4 mm from the needle up stop
position when the sewing machine stops.
2. Loosen the screw
r
and move the thread guide connecting plate
t
up or down so that the thread wiper is
approximately 20 mm from the needle when it is at the standby position.
u
w
q
e
r
t
y