Juki 812k Setup guide

From the library of: Superior Sewing Machine & Supply LLC

ILLUSTRATE

PAR

5 LIST

FOR

HEAVY

KARPEl

Kl

G

DUTY

MACHI

E

~

.

Model

8 I

2K

·,

421

NORTH

MIDLAND

AVE.• SADDLE BROOK, N.J.

07662•

(20

1)

796·8800

(2

12) 929-4415

National

Distributors

of

Juki

& Kin

g/

me

Indu

st

rial

S

ew

/ng

Machi

n

e"

From the library of: Superior Sewing Machine & Supply LLC

OILING DIAGRAM

Fig.

I

- I -

From the library of: Superior Sewing Machine & Supply LLC

THREADING

DIAGRAM

Fig.

2

-

2-

From the library of: Superior Sewing Machine & Supply LLC

THREADING AND ADJUSTMENT

INSTRUCTIONS

FOR

KINGLINE MODEL

812K

HEAVY DUTY KARPET KING

812K

One

needle

heavy

duty

flat

bed

machine

for

overseoming

rugs

and

carpets.

Stitch

type

505-EFD-1

(modified).

----SETTING

UP MACHINE

1.

Clean

machine

thoroughly.

Fill

oiling

system

and

oil

all

bearings,

particularly

the

eccentrics

on

the

main

shaft.

Run

the

machine

slowly

for

a

minute

to

allow

the

oil

wicks

to

corry

the

oil

to

the

bearings.

See

that

the

wicks

ore

saturated

by

the

flow

from

the

oil

reservoir

and

that

they

contact

the

oil

holes

in

the

strops.

Repeat

the

oiling

and

run

for

five

minutes

at

2.000

R.P.M..

Oiling

diagram

(Figure

1)

is

available.

2.

Put

in a

new

needle,

class

1970.

size

100

(SOE)

and

check

location

of

needle

in

throat

plate.

The

needle

should

center

in

the

front

end

of

the

throat

p l

ate

needle

slot.

The

needle

point

in

its

highest

position

should

be

1}

;!"

inches

above

the

top

of

the

throat

plate

(Figure

3).

3.

Remove

the

presser

feet,

cloth

plates

and

feed

dog

for

convenient

access

to

the

machine.

Loosen

the

screw

(::::

93A)

on

the

right

side

of

the

feed

bar

and

push

the

rear

ne

e

dle

guard

(::

81225K)

for

enough

to

the

rear

to

ovoid

its

contact

i

ng

the

needle.

4.

Pla

ce

the

left

hand

looper

in

the

looper

holder

and

set

the

looper

gouge

to

~

-

4

inch.

The

looper

gouge

is

set

when

the

looper

is

at

its

farthest

poini

of

travel

to

the

l

eft

(Figure

4). This

adjustment

is

accomplished

by

rocker

and

raising

or

lower

i

ng

the

boll

Fig.

3

Fig.

4

Feed

Dog

1

II

1-z

Left

hand

l

ooper

- 3 -

From the library of: Superior Sewing Machine & Supply LLC

joint

(#

15442K)

in

the

slot.

Raising

the

ball

joint

decreases

the

looper

gauge

and

lowering

it

acts

the

reverse.

Looper

gauge

is

available

for

setting

the

looper.

5.

Set

the

left

hand

looper

so

that

it is

up

to

the

back

of

the

needle

without

deflecting

it. This

adjustment

is

readily

made

by

loosening

the

two

screws

(#

95)

in

the

looper

rocker.

6.

Set

the

rear

needle

guard

so

that

it

barely

contacts

the

needle

at

its

most

forward

point

of

travel.

7.

Set

the

distance

between

centers

(#

6038K

& #

6039K)

of

the

right

hand

looper

drive

connecting

rod

(#

81241)

straps

at

4-

%

".

This is

done

by

loosening

the

two

nuts

(:!;

269

&

:;

18)

on

the

pitman

rod

and

turning

the

rod

until

the

desired

measurement

is

obtained,

then

tighten

the

nuts

and

reassemble

the

connecting

rod

in

the

machine.

8.

Set

the

right

hand

looper

gauge

so

that

the

point

of

the

right

hand

looper

passes

~~"

to

the

left

of

the

center

of

the

needle

when

the

looper

is

at

its

extreme

left

position

(Figure

5).

The

looper

gauge

of

the

right

hand

looper

is

controlled

by

moving

the

looper

drive

lever

(:;;

81238)

on

the

cross

shaft.

To

increase

the

looper

gauge,

move

the

lever

clockwise

and

to

decrease

the

looper

gauge,

move

the

lever

the

opposite.

When

tightening

the

screws

on

the

looper

drive

lever,

make

sure

that

there

is

no

end

play

in

the

cross

shaft.

This

may

be

done

by

pushing

forward

on

the

cross

shaft

and

at

the

same

time

setting

the

looper

drive

lever

tight

up

against

the

casting.

Re-check

the

setting

of

the

looper

with

respect

to

the

needle

each

time

the

loop

er

drive

leve

r is

shifted.

I

L

Right

hand

looper

Fig.

5

9.

When

right

hand

looper

moves

to

the

right,

it

must

pass

the

needle

as

close

as

possible

without

deflecting

it. It

must

also

cross

th

e

left

hand

looper

as

close

as

possible.

The

adjustment

for

setting

the

right

hand

looper

is

made

by

loosening

the

two

screw

(:;:;:

318)

at

the

front

of

the

machine

and

moving

t

he

looper

shaft

bearing

or

sliding

block

(¢

81

255).

Moving

the

block

upward

brings

the

looper

closer

to

the

needle

and

moving

it

downward

brings

the

looper

closer

to

the

left

hand

looper.

The

loopers

themselves

can

be

turned

slightly

by

loosening

the

holding

screws

and

holding

the

l

oopers

in

the

desired

position

while

retightening

the

screws.

- 4 -

--------

From the library of: Superior Sewing Machine & Supply LLC

10.

With

right

hand

looper

at

its

extreme

left

position.

set

the

right

hand

looper

thread

take-up

eyelet

(;:=

81266KB)

in a

vertical

position

being

careful

that

the

left

hand

looper

gauge

is

not

changed

when

nut

(::::

9937)

is

loosened.

11.

Put

the

feed

dog,

cloth

plates

with

throat

plate

back

on

the

machine

and

set

the

front

needle

guard

close

to

the

needle

without

deflecting

it.

This

guard

is

readily

adjusted

by

loosening

the

screw

(::::

90)

in

top

of

the

throat

plate

in

front

of

the

needle

slot

and

moving

the

guard

into

position

and

retightening

the

screw.

Place

the

presser

feet

on

the

machine

and

check

the

vertical

movement

of

the

presser

bars

with

the

pressure

released

as

much

as

convenient.

The

bars

must

move

freely.

THIS FACTOR IS VITAL.

12.

The

height

of

the

feed

dog

is

correct

when

at

its

hightest

point

of

travel

the

tips

of

the

rear

teeth

project

1/

32"

above

the

throat

plate.

A

stop

screw

is

provided

to

maintain

the

adjustment

(Figure

3).

13.

Screw

the

edge

guide

on

to

the

cloth

plate

and

abjust

it

so

that

the

edge

guide

tongue

(:

81203KA-1)

is

against

the

presser

foot

stitch

tongue.

14.

Draw

the

thread

into

the

machine

and

start

operating

on

a

piece

of

rug

materia

l.

Threading

diagram

(Figure

2)

is

available.

1

5.

Adjust

the

stitch

length

to

give

the

desired

number

of

stitches

per

inch.

This

adjus

t

ment

is

made

by

loosening

the

stitch

regulator

stud

nut

(::::

HA

18A)

on

the

side

of

the

feed

rocker

(:::

80233)

(Figure

6)

.

Raising

the

feed

driving

arm

(::::

80651)

shortens

the

stitch

and

lowering

it

l

engthens

the

stitch.

After

the

stitch

length

is

set,

re

s

et

the

rear

need

le

guard

so

that

it

barely

contac

ts

the

needle

when

in

its

most

forward

position

of

trave

l.

Shorten

'

Lengthen

stud

nut

Fig.

6

- 5

From the library of: Superior Sewing Machine & Supply LLC

16.

Regulate

the

pressure

an

the

presser

feet

so

that

the

springs

exert

a

pressure

sufficient

to

feed

properly

. A

comparatively

heavy

pressure

is

usually

required.

17.

Adjust

the

left

hand

looper

thread

take-up

(

~

81266K)

outward

or

clockwise

until

the

left

hand

looper

thread

just

tightens

as

the

left

hand

looper

thread

comes

off

the

right

hand

looper.

{CAUTION

-

NO

LEFT

HAND

LOOPER

THREAD

SHOULD

BE

DRAWN

FROM

THE

CONE

AT

THIS

TIME).

All

the

left

hand

looper

thread

should

be

drawn

from

the

cane

as

the

left

hand

looper

moves

to

the

end

of

its

travel

to

the

right.

18.

The

needle

and

right

hand

looper

thread

tension

should

be

set

as

low

as

possible

yet

high

enough

to

give

positive

and

consistent

control

to

the

needle

and

right

hand

looper

thread.

The

left

hand

looper

thread

tension

should

be

just

high

enough

to

give

a

beaded

appearance

of

the

lower

thread

at

the

purl

or

edge.

19.

Make

sewing

test

on

a

single

thickness

of

rug

material.

If

satisfactory

samples

are

not

obtained,

check

the

following

thread

controls.

20.

NEEDLE

THREAD

CONTROL

I o

pull

less

needle

thread

into

the

stitch,

or

move

purl

down,

increase

needle

thread

tension,

or

raise

needle

frame

eyelet.

Most

of

the

needle

thread

should

be

drawn

from

the

cone

on

the

upstroke

of

the

needle.

21.

RIGHT

HAND

LOOPER

THREAD

CONTROL

To

pull

mare

right

hand

looper

thread

into

the

stitch,

or

move

purl

down,

reduce

the

right

hand

looper

thread

tension

or

move

right

hand

looper

thread

tcke-up

{eyelet

)

clockwise,

being

careful

that

the

left

hand

looper

gauge

is

not

changed

when

nut

{:::;:

9937)

is

loosened.

22.

LEFT

HAND

LOOPER

THREAD

CONTROL

The

left

hand

looper

thread

control

eyelet

(take-up)

should

be

adjusted

outward

or

clockwise

until

the

left

hand

looper

thread

just

tightens

as

the

left

hand

looper

thread

should

be

drawn

from

the

cone

as

the

left

hand

looper

moves

to

the

end

of

its

trave

l

to

the

right.

- 6 -

From the library of: Superior Sewing Machine & Supply LLC

376

@m

880687

376

~

94

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'

~

-

~~~

\~

Rrfoi

A

l~

IV

II

J

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Ol

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80631

881201A

81239

i

~

0

80648

80437A

80438

880688

22574

/ 1\

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I

~

80440

Plate

No.

1

I -

From the library of: Superior Sewing Machine & Supply LLC

89

94

376

420

22574

80437A

80438

80440

80631

80648

80649

880687

880688

881201

881201A

81239

Plate

No.

1

Set

screw

for

Hinge

pin.

Set

screw

for

Presser

bar

lifter

guide

plate

and

Looper

thread

guard.

Screw

for

Face

plate.

Lifter

lever

stud.

Screw

for

Cloth

plate.

Cloth

plate

swinging

extension

hinge

.

Spring

for

Locking

bolt.

Locking

bolt

knob.

presser

bar

lifter

guide

plate

.

Lifter

lever.

Lifter

lever

spring.

Face

plate.

Top

cover.

Cloth

plate.

Cloth

plate

swinging

extension.

Cloth

plate

swing

i

ng

extension

loc

k

ing

bolt

.

••

l3

-

2

pes.

4

pes

.

2

pes.

pe.

3

pes.

pc.

pe.

1

pe.

2

pes.

pe

.

1

pc.

pc

.

pe.

pc.

1

pc

.

From the library of: Superior Sewing Machine & Supply LLC

@

80630C

80630

@

806300

806948

29782H

81222

80681

®

#...._

!4E

/

~

0

HA66K

88062

l H

80694C

80685

80621A

so

~

80674

2539

I

~

HA81

HA95

Plate

No.2

JUKI 812K Setup guide

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