Справочник Пользователя для Brother LK3-B448E

LK3-B448E MARK

II

/BA-16

44

2

±

0.5mm

q

w

e

(Approx.
30mm)

Approx.
20mm

r

t

The needle up stop position is adjusted so that the index
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.

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 

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

w 

to the correct position and then start the sewing

machine.

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