Brother International LK3-B430 Service Manual - Page 26

M

VERTICAL

SHAFT

1.

Roller

holder

lever

position

adjustment

/

0—

0-

—0

-0

With

the

machine

at

the

stop

position

(roller

0

riding

on

the

projected

part

on

the

periphery

of

the

feed

cam).

loosen

bolt

and

move

roller

holder

0

to

adjust

the

clearance

between

clutch

cam

lever

roller()

and

roller

holder

0

to

I

mm.

2.

Worm

wheel

backlash

adjustment

With

the

machine

at

the

stop

position.

loosen

six

screws

0

for

worm

0.

and

move

worm

0

so

that

worm

wheel

0

has

a

play

of

0.02

to

0.05

mm

when

the

clutch

cam,

or

the

knife

cam

is

gently

moved

by

hand. Play

increases

if

worm

0

is

moved

in

the

forward

direction

of

the

machine,

or

decreases

if

the

worm

is

moved

backward.

After

this

adjustment.

check

the

timing

of

the

needle

and

feed:

the

position

and

timing

of

the

movable

knife:

and

the

clutch

cam

timing.

*

After

this

adjustment.

turn

the

machine

by

one

cycle

and

make

sure

that

the

worm

wheel

turns

smoothly.

3.

Change

gear

backlash

adjustment

CZ)

Less

More

et

Loosen

screw

0,

and

turn

cam

shaft

Q

to

adjust

the

change

gear

to

have

a

play

of

0.02

to

0.05

mm

when

the

feed

cam

is

turned

just

so

much

as

to

be

free

of

vertical

shaft

play

with

the

machine

at

the

stop

position.

*

After

this

adjustment.

turn

the

machine

by

one

cycle

and

make

sure

that

the

machine

runs

smoothly.

—

26

—

Brother International LK3-B430 Service Manual - Page 26

Brother International LK3-B430 Manual

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