Manual Juki LK-981 Sewing Machine

Manual

I.

STANDARD

ADJUSTMENTS

Standard

adjustments

(1)

Needle

and

sewing

hook

1) Height of

the

needle

bar

When

the

needle

bar

has

reached

Its

lowest

position,

the

upper

engraved

line

on

the

needle

bar

must

align

with

the

bottom

end

of

the

needle

bar

bushing

(lower).

2)

Shuttle

With

the

above

needle

bar

position,

the

pointed

end

of

the

shuttle

must

align

with

the

needle

center.

3)

Clearance

between

the

needle

surface

and

the

shuttle

must

be

0.05

to

0.1

mm.

4)

There

must

be

no

clearance

between

the

needle

and

the

shuttle

driver.

The

top

end

of

the

shuttle

driver prevents

the

needle

from bending as shown In Fig. 1-b.

5) Clearance

between

the

top

end

of

the

shuttle

driver

and

the

shuttle

must

be

0.3

to

0.5

mm

(about

1/64").

When

the

needle

has

reached

its

lowest

position.

When

the

needle

thread

is

taken

up

by

the

shuttle.

Upper

engarved

line

Lower

engraved

line

Fig. 1-a

Fig. 1-b

0.05—0.

Inim

Fig. 1-c

Onim

Shuttle

driver

Fig. 1-d

Note:

Adjustments

of

"Height

of

the

needle

bar"

and

"shuttle"

may

vary

In

some

subclass

models

(2)

Feed

cam

Adjust

the

cam

so

that

the

cloth

feed

motion

Is

completed

when

the

needle

point

has

come

down

7 to 10 mm

(9/32"

to

25/64")

above

the

throat

plate

surface.

- 1 -

7—lOram

t

Fig. 2

From the library of: Superior Sewing Machine & Supply LLC

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