9. STANDARD ADJUSTMENTS

9. STANDARD ADJUSTMENTS

CAUTION

Maintenance and inspection of the sewing

Hold the machine head with both hands when

machine should only be carried out by a qualified

tilting it back or returning it to its original position.

technician.

Furthermore, after tilting back the machine head,

Ask your Brother dealer or a qualified electrician to

do not push the face plate side or the pulley side

from above, as this could cause the machine head

carry out any maintenance and inspection of the

to topple over, which may result in personal injury

electrical system.

or damage to the machine.

 

 

Turn off the power switch and disconnect the

 

 

If the power

switch

needs to be

left

on when

power cord from the wall outlet at the following

carrying out

some

adjustment,

be

extremely

times, otherwise the machine may operate if the

careful to observe all safety precautions.

 

foot switch is depressed by mistake, which could

 

 

 

 

 

 

result in injury.

If any safety devices have been removed, be

When carrying out inspection, adjustment and

absolutely sure to re-install them to their original

maintenance

positions and check that they operate correctly

When replacing consumable parts such as the

before using the machine.

 

 

rotary hook and knife

9-1. Adjusting the needle bar height

(1)

 

 

(2)

a

A

(3)

 

 

1237S

 

1238S

Turn the machine pulley to move the needle bar to the lowest position. Then remove the rubber plug (2), loosen the screw (3) and then move the needle bar up or down to adjust so that the second reference line from the bottom of the needle (reference line A) is aligned with the lower edge of the needle bar bush (1).

* If using a DP X 5 needle, use the highest reference line (reference line a).

9-2. Adjusting the needle bar lift amount

(1)

bB

(2)

1239S

1240S

Turn the machine pulley to raise the needle bar from the lowest position until the lowest reference line on the needle (reference line B) is aligned with the lower edge of the needle bar bush (1). Then loosen the screw (2) and move the driver to adjust so that the tip of the rotary hook is aligned with the needle center line.

* If using a DP X 5 needle, use the second reference line from the top of the needle (reference line b).

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BAS-311F-0, 311F-L, 326F-0

Page 49
Image 49
Brother BAS-311F-L, BAS-326F-0 Standard Adjustments, Adjusting the needle bar height, Adjusting the needle bar lift amount