Brother LK3-B438E MKII Owner's Manual

ZE-8570,8580

Adjust so that the end of the rotary hook holder 

q is 0 to

0.5 mm back from end A of the inner rotary hook 

w.

*

The end of the rotary hook holder 

q must never ex-

tend to the right of end A of the inner rotary hook 

w.

1. Loosen the screw 

e and adjust the position of the ro-

tary hook holder 

q.

2. Securely tighten the screw 

e.

1

1. Turn on the power switch.

1

2. Press the TEST key 

q and check that the TEST indica-

tor 

w is illuminated.

(For safety purposes, be sure to carry out this step, as
it prevents the motor from operating even if the treadle
is depressed.)

1

3. Set the zigzag width to 

AA AA

 and the trimming mar-

gin base line position to 

AA AA

. (Refer to pages 75-83)

1

4. Remove the presser foot 

e, needle plate r, and feed

dog 

t.

1

5. Place the needle plate 

r on the needle plate installa-

tion surface of the machine bed.

1

6. Turn the machine pulley to move the needle bar 

y from

its lowest position, and check the following when the
distance from the top of the needle plate 

r to the bot-

tom edge of the needle bar 

y is the same as the height

of accessory timing gauge D-2 

u.

•     The tip of the rotary hook 

i should be aligned with

the center of the needle.

•    The distance from the tip of the rotary hook 

i to

the needle should be 0 to 0.05 mm.

1

7. If the above are not correct, loosen the two screws 

o

and adjust the position of the rotary hook 

!0.

After adjustment, securely tighten the two screws 

o.

1

8. Set the zigzag width to the maximum setting, and set

the trimming margin base line position to the mini-
mum value.

1

9. Turn the machine pulley to move the needle to its fur-

thest left position so that the tip of the rotary hook 

i

is aligned with the center of the needle, and check that
the distance from the upper edge of the needle hole to
the tip of the rotary hook 

i is 0.2 to 0.5 mm at this

time.
*    If the distance is not correct, adjust the height of

the needle bar. (Refer to page 165.)

10. If needle deflection occurs when sewing material with

joints, bend the needle guard 

!1 as shown in the illus-

tration A so that it touches the needle.
*    After this, check that the clearance between the tip of

the rotary hook 

i and the needle is 0 to 0.05 mm.

11. Press the TEST key 

q so that the TEST indicator w

switches off.
Normal sewing will then be possible.
Turn off the power to continue adjustment.

q

e

q

e

w

A

w
q

i

i

i

!0

o

i

!1

A

Maximum zigzag width

0 to 0.05 mm

0.2 to 0.5 mm

0 to 0.05 mm

0 - 0.5 mm

Zigzag width 0mm

e

r

t

y

u

r