Справочник Пользователя для Brother DH4-B980
9. STANDARD ADJUSTMENTS
RH-9800
43
9. STANDARD ADJUSTMENTS
CAUTION
Maintenance and inspection of the sewing
machine should only be carried out by a qualified
technician.
machine should only be carried out by a qualified
technician.
Ask your Brother dealer or a qualified electrician to
carry out any maintenance and inspection of the
electrical system.
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, otherwise the machine may operate if the
start switch is pressed by mistake, which could
result in injury.
power cord from the wall outlet at the following
times, otherwise the machine may operate if the
start switch is pressed by mistake, which could
result in injury.
When carrying out inspection, adjustment and
maintenance.
When replacing consumable parts such as the
loopers and knife.
maintenance.
When replacing consumable parts such as the
loopers and knife.
Disconnect the air hoses from the air supply and
wait for the needle on the pressure gauge to drop
to "0" before carrying out inspection, adjustment
and repair of any parts which use the pneumatic
equipment.
wait for the needle on the pressure gauge to drop
to "0" before carrying out inspection, adjustment
and repair of any parts which use the pneumatic
equipment.
If the power switch and air need to be left on when
carrying out some adjustment, be extremely
careful to observe all safety precautions.
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 original
positions and check that they operate correctly
before using the machine.
absolutely sure to re-install them to their original
positions and check that they operate correctly
before using the machine.
9-1. Adjusting the height of the spreader and looper
Spreader height
The clearance between the left spreader (forked spreader) and the left looper must be set to match the thickness of the
lower thread. The clearance between the right spreader and the right looper should be as small as possible while still
letting the parts slide.
lower thread. The clearance between the right spreader and the right looper should be as small as possible while still
letting the parts slide.
1. The right spreader (1) and left spreader (2) move by means of springs (3). Adjust so that the spreaders move smoothly
between the right spreader stopper (4), the left spreader stopper (5) and the LS-holder bracket (6), with no looseness.
2. If adjustment is necessary, loosen the screw (7) and then move the right spreader stopper (4) or left spreader stopper
(5) up or down.
Looper height
1. Set the clearance between the left looper (8) and the left spreader (2) to the same distance as the thickness of the
lower (looper) thread.
2. The clearance between the right looper (9) and the right spreader (1) should be as small as possible.
3. If adjustment is necessary, loosen the screw (10) and then move the left looper (8) and right looper (9) up or down.
3. If adjustment is necessary, loosen the screw (10) and then move the left looper (8) and right looper (9) up or down.
(2)
(1)
(4)
(7)
(3)
(5)
(3)
(7)
(2)
(3)
(5)
(6)
0948Q
0947Q
(2)
(8)
(10)
(1)
(9)
(10)
0949Q
0950Q