9. STANDARD ADJUSTMENTS

9. STANDARD ADJUSTMENTS

CAUTION

Maintenance and inspection of the sewing

Disconnect the air hoses from the air supply and

machine should only be carried out by a qualified

wait for the needle on the pressure gauge to drop

technician.

to "0" before carrying out inspection, adjustment

Ask your Brother dealer or a qualified electrician to

and repair of any parts which use the pneumatic

equipment.

carry out any maintenance and inspection of the

 

electrical system.

If the power switch and air need to be left on when

Turn off the power switch and disconnect the

carrying out some adjustment, be extremely

careful to observe all safety precautions.

power cord from the wall outlet at the following

 

times, otherwise the machine may operate if the

If any safety devices have been removed, be

start switch is pressed by mistake, which could

absolutely sure to re-install them to their original

result in injury.

positions and check that they operate correctly

When carrying out inspection, adjustment and

before using the machine.

maintenance.

 

When replacing consumable parts such as the

 

loopers and knife.

 

 

 

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.

(2)

(1)

(2)

 

(5)

(4)

 

 

(3)

(3)

(3)

 

 

 

(7)

(7)

(5)

 

0947Q

 

(6)

0948Q

 

 

 

 

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

 

(2)

(1)

 

 

 

(8)

(9)

 

 

(10)

0949Q

(10)

0950Q

 

 

 

 

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.

RH-9800

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Brother DH4-B980 Standard Adjustments, Adjusting the height of the spreader and looper, Spreader height, Looper height

DH4-B980 specifications

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