Standard Adjustments; Needle Bar Height Adjustment - Brother DA-9270 Instruction Manual

9. STANDARD ADJUSTMENTS

9. STANDARD ADJUSTMENTS
¡
Maintenance and inspection of the sewing ma-
chine should only be carried out by qualified
personnel.
¡
Ask your Brother dealer or a qualified electri-
cian to carry out any maintenance and inspec-
tion of the electrical system.
¡
Turn off the power switch and disconnect the
power cord from the wall outlet at the follow-
ing times, otherwise the machine may operate
if the treadle is pressed by mistake, which could
result in injury.
However, the motor will keep turning even af-
ter the power is switched off as a result of the
motor's inertia. Wait until the motor stops fully
before starting work.
¡ When carrying out inspection, adjustment
and maintenance
¡ When replacing consumable parts such as
the looper

9-1. Needle bar height adjustment

o
!0
y
e
11.3mm
(For thin
materials)
w
10.1mm
(For medium-
thick materials)
y
0
0
q
15
CAUTION
q
w
i
u
t
r
i
q
¡
If the power switch needs to be left on when
carrying out some adjustment, be extremely
careful to observe all safety precautions.
¡
If any safety devices have been removed, be
absolutely sure to re-install them to their origi-
nal positions and check that they operate cor-
rectly before using the machine.
Adjust the heights of the needles
At this time, adjust so that each needle
i
of the needle hole
1. Remove the screw
!0
.
2. Turn the machine pulley to drop the needle bar to its
lowest position.
3. Remove the rubber plug
t
clamp screw and adjust so that the distance between
the bottom of the needle clamp
w
needle plate is 11.3 mm (for thin materials) or 10.1
mm (for medium-thick materials).
* If the needle clamp is set in the way described
above, the distance between the points of the
q
needles and the top of the needle plate
8.5 mm (for thin materials) or 10.3 mm (for medium-
thick materials) when the needle clamp
to its highest position.
4. Remove the three screws
w
needle plate .
5. Turn the machine pulley so that the needles
y
needle guard
the needle clamp
the left and right needles
this time.
Install the needle plate
after checking that the needles
the needle holes
t
.
6. Insert the rubber plug
7. Install the presser foot
DA-9270
q
.
q
is in the center
w
in the needle plate .
o
, and then remove the presser foot
r
, loosen the needle bar
e
and the top of the
u
, and then remove the
are aligned, and then adjust the tilt of
e
so that there is no space between
q
and the needle guard
w
with the three screws
q
are in the centers of
i
, tighten the needle bar clamp screw
r
.
!0
with the screw
w
will be
e
is raised
q
and the
y
at
u
, and
o
.