9. STANDARD ADJUSTMENT

9. STANDARD ADJUSTMENT

CAUTION

Maintenance and inspection of the sewing machine

Hold the machine head with both hands when tilting

should only be carried out by a qualified technician.

it back or returning it to its original position.

 

Ask your Brother dealer or a qualified electrician to

Furthermore, after tilting back the machine head, do

not push the face plate side or the pulley side from

carry out

any

maintenance and inspection of the

above, as

this could cause

the machine head

to

electrical system.

 

 

topple over, which may result in personal injury or

Turn off the power switch and disconnect the power

damage to the machine.

 

 

cord from

the

wall outlet at

the following times,

If the power switch needs to be left on when carrying

otherwise

the

machine may

operate if the foot

out some

adjustment, be

extremely careful

to

switch is depressed by mistake, which could result

observe all safety precautions.

 

in injury.

 

 

 

 

 

 

 

If any safety devices have been removed, be

￿ When carrying out inspection, adjustment and

maintenance

 

 

absolutely sure to re-install them to their original

￿ When replacing consumable parts such as the

positions and check that they operate correctly

rotary hook

 

 

before using the machine.

 

 

9-1. Standard thread tension

Use

 

KE-430F

 

BE-438F

 

 

 

 

 

Medium-weight

Knitted wear

 

Foundation

Heavy-weight

 

 

 

 

materials (-03)

(-0K)

 

garments (-0F)

materials (-05)

 

Upper thread

#50 or

#60 or

 

#60 or

#30 or equivalent

#60 or equivalent

equivalent

equivalent

 

equivalent

 

 

 

 

Lower thread

#50 or

#80 or

 

#60 or

#50 or equivalent

#60 or equivalent

equivalent

equivalent

 

equivalent

 

 

 

 

Upper thread tension (N)

 

0.8 - 1.2

 

 

1.2 – 1.8

0.5 - 1.2

[Tension value]

 

[80 - 120]*1

 

 

[70 - 130]*1

[50 - 150]*1

Lower thread tension (N)

 

 

0.2 - 0.3

 

0.2 - 0.3

 

 

 

 

 

 

Pre-tension (N)

 

0.05 - 0.3

 

0.1 - 0.4

 

 

 

 

 

 

 

Needle

DP x 5 #14

DP x 5 #9

 

DP x 5KN #11

DP x 17NY #19

DP x 17NY #12

 

 

 

 

 

 

 

*1: This is the tension value when the pretension is 0.05 N.

9-1-1. Upper and lower thread tension

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2318B

 

2319B

63

KE-430F, BE-438F