Brother LK3-B448E - Manual (Page 51)

LK3-B448E MARK II /BA-16
10. Adjustment
44
2
±
0.5mm
q
w
e
(Approx.
30mm) Approx.
20mm
r
t
10-12. Adjusting the needle up stop position
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.
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
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.
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