9. STANDARD ADJUSTMENTS
DA-927A, DA-928A
17
9. STANDARD ADJUSTMENTS
CAUTION
Maintenance and inspection of the sewing machine should only be carried out by qualified personnel.
Ask your Brother dealer or a qualified electrician to carry out any maintenance and inspection of the electrical system.
Turn off the power switch and disconnect the power cord from the wall outlet at the following times.
However, the motor will keep turning even after the power is switched off as a result of the motor’s inertia. Wait until the
motor stops fully before starting work.
The machine may operate if the treadle is depressed by mistake, which may result in injury.
When carrying out inspection, adjustment and maintenance
When replacing consumable parts such as the looper
If any safety devices have been removed, be absolutely sure to re-install them to their original positions and check that
they operate correctly before using the machine.
9-1. Needle bar height adjustment
Adjust the heights of the needles (1).
At this time, adjust so that each needle (1) is in the center of the
needle hole (3) in the needle plate (2).
1. Remove the screw (4), and then remove the presser foot (5).
2. Turn the machine pulley to raise the needle bar to its highest
position.
3. Remove the three screws (6), and then remove the face
plate (7) and the face plate packing (8) and loosen the screw
(9) of the needle bar clamp.
4. Move the needle clamp (12) up or down to adjust so that the
distance from the needle tip to the top of the needle plate (2)
is as shown in the illustration when the needle (1) is at its
highest position.
5. Rotate the needle clamp (12) so that the needle (1) is in the
center of the needle hole (3) of the needle plate (2) when the
machine pulley is turned so that the needle (1) goes into the
needle hole (3).
6. Tighten the screw (9), and then install the face plate (7) and
the face plate packing (8) with the three screws (6).
7. Install the presser foot (5) with the screw (4).
*
Turn the machine pulley and check that the
clearances between the left and right sides of the
needle (1) and the needle guard (11) are uniform
when the needle (1) and the needle guard (11) are
aligned.
1512B
4270B
4271B
4272B
4269B
