Juki DLU-5490N, DLU-5490N-7 User Manual

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Preface

This Engineer's Manual mainly consists

adjust", and "Results the maintenance and repair especially

"Standard adjustment".Please read this manual carefully before using the units

in order to get the most out

of

improper adjustment". All technical personnel who are responsible for

of

the DLU-5490N and DLU-5490N-7 should carefully read

of

them and to enjoy using them for a long time.

CAUTION

1.

K~ep

powN

opuatmg.

your

switch

hands

is

away

tumed

from

the needle

ON or while

the

\'>'hen

machine

the

2.

is

of

three sections; "Standard adjustment",

Do

not

put

your

lingen

into

the

1hnad

take-up

v.hile

the

mil<:hine is

operating

co•er

3.

Be

the m•chine

sure to

"How

tur~

the

had

or

to

powtr

rema•lng

switch

the

OFF

Vbelt

befora tihing

5.

II

your

"'•chine

4.

Ourin9

operation,

other

per!on's

handwhul,

not

pl~ce

dangerous.

BEFORE

•

Don't

be

cardul

head or

V belt,

anything

lunds

bobbin

winder

dose

to them. Doing

.

OPERATION

run

the

machine

not

to_

tO

allow

come close

or

mator.

your

Al1o,

so

mly

before

or

any

to

tha

do

Ia

g\Jard or

machine with any of

filling

is

any

<>Iller

the

oil reservoir.

• After setting up your machine, make sure that lower revolution direction

the

needle

by

momentarily

of

the

by

turning

handwheel:

the

handwheel

switching

the

counterclockwise

power

handwheel's end).

the

Run one

Confirm

newly installed machine at a

month.

the

ratings of your power source by the machine plate stuck on

motor (power voltage, Do

not wipe

the

surface of the machine head with lacquer thinner.

phase

etc.)

speed

pro>ided with a belt covor, finger

prot~to,,

do

not

operate

them

removed.

it

runs

in

and

watch

"on"

when

of 4,000 s.p.m.

your

the correct direction;

the

(correct rotational

viewed

or

handwheel's

from

the

lower for the

the

CONTENTS

1.

SPECIFICATIONS

2.

APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . 2

STANDARD

3.

( 1) Height

(2) Timing between the needle (3) Height

Feed

(4) (5)

(6) Walking

(7) Relationship between the walking foot graduation plate . . . . • . . . . • . • . . . . . . . . . . . . . . . . . 7

(8) Top feed vertical timing

(9) Top feed horizontal timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

0)

( 1

11)

(

( 12) Position

( 13) Position (14) DISASSEMBLING

4. (1) Disassembling

(2} Disassembling and reassembling the

5.

HOW

1)

(

(2)

(3) (4)

6.

HOW

(1) Trajectory (2)

REPLACING

7.

8.

INSTALLING

1)

( (2)

(3)

9.

TROUBLES

10.

HOW

11. PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

12.

TABLE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . .

.timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Tilt

of

Longitudinal position Normal

Position

TO REMOVE How

to How to remove play How

to How

to remove play TO ADJUST THE TOP FEED

Position

Description Installing the stand other than

PF·6 pedal components

TO

USE

................................•.................•......

ADJUSTMENT . . . . . . . . . . . • . • . • • . . . . • . . . • . . . . • . . . . . . . . . . . . . . . . • . • 3

of

the needle bar

of

the feed dog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . 3

the feed dog

foot

pressure

and

reverse

of

the reverse feed solenoid

of

the wiper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

of

the PF-6 partial shirring stopper

AND

and

PLAY...........

remove play from the walking

remove play

of

walking

of

the roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . 27

THE

MOVING

AND

ADJUSTING

of

the PF·6 partial shirring device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

AND

CORRECTIVE MEASURES

GAUGES

........

and

...........................

and

presser

.................................

of

the walking

feed pitches

REASSEMBLING PROCEDURES

reassembling the

from

the walking

from

the

from

the

foot

.....•..

KNIFE

THE

.................•.............

.........................

:

......

the

hook,

foot

pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

foot

......

.....................................

face

top

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

foot foot

reverse

feed control lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

reverse

feed control lever shaft

DRIVE

JUKI

MECHANISM

·

............•............

............

PARTIAL

Z·type stand . . . . . . . . . . . . . . . . • . . . . . . . . . • . • . . . . 29

, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

. , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

,

.................

..........

and

top

feed

feed drive mechanism

rock shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

adjusting

,

SHIRRING DEVICE (PF·6)

.•...•.......•..•...............

,

.......................

·.

. . . . . . . . . . . . . . . . 7

, . . . . . . . . . . . . . . . . . . .

,

...............

...........................

components......................

.........

link

..................

........

..........

..........................

,

....................

, . . . . . . . . . . . . . . . 19

, . . . . . . . . . . . . . . . . 25

,

.... , ..... , ... , ..

.....

, . . . . . . . . . . . . . . . . . .

, . . . .

,

.. , ......

,,.

,

•.....

,

...

•.

. . . . . . . . . . 26

, . . . . . . . . . . . • 29

, . . 24

,..

,

....

:.

. . . .

, . . . . .

, . 5

, 13

, 28

11

15 15

26

30 31 35

38

·

1.

SPECIFICATIONS

Model

Sewing

I

Stitch length

2

Needle bar stroke

3

Top feed amout

4

speed

5 Needle (standard)

6 7 8

Presser

Lift Lift

foot

pressure

of

walking foot

of

presser foot

(by knee lifter)

(by hand lifter)

Gauges (Walking foot,

9

feed dog, throat plate)

10 Height

II

12 13

of

feed dog Feed system Thread take-up Thread take-up stroke

DLU-5490N DLU-5490N-7(-7-0B,

4,000spm

(normal

o-

-7-WO, speed),

5mm

-7-WB) 4,500spm

(0-

0.197")

(max.

30.7mm (1.209")

0-

8mm (0.315") (depends

on

DBX I #II

4-

5kg (at the standard height

(0.118") for the standard version (BB)

3mm

Standard: I

4.5-

Omm

5 .5mm

(0.394"),

of

Max:

(0.177"-

presser spring regulator)

13mm (0.512"}

0.217")

DLU-491 Replacement gauges may be used. (standard: BB)

DLU-490 Replacement gauges may be used. (Some

0.7-

0.8mm

Commonly

(0.028"-

known

as

"swing"

O.o31")

Link type

Standard:

107mm (4.213"), Max. 112mm

(4.409")-

speed)

gauges used)

of

them may

not

system

Min. 105mm (4.134")

be used.)

14 Lubrication 15

Oil

return system

16

Lubricating oil

17 Wiper 18 Automatic

stitching device

19

Motor

20 Motor

21 22 Solenoid

Power

output

supply

drive

.

reverse

AC

servomotor (applicable only

Provided

Rated output: 400W, Max. output: 55

automatic

3-phase

thread

or

single-phase

trimmer)

(applicable

power DC-3!V (applicable only to a version with automatic thread trimmer)

Fully automatic

By

plunger pump

New

Defrix Oil No. I

Provided

on

5490N-7-0B and 5490N-7WB

to

a version with automatic thread trimmer)

only

supply

Max. sewing speed limit

23

200spm- max. sewing speed (applicable only to a version with automatic

thread trimmer)

Needle up/down stop

24

switch

The machine usually stops with its needle down.

machine can be stopped with its needle up.

25 Auto-lifer Available as an option (applicable only

trimmer)

5490N-7-

0W

to a version

to

WB

(applicable only to a version with

with

automatic

By

thread

using this switch, the

a version with automatic thread

trimmer)

-]-

2. APPLICATIONS

* Extensively

uniforms, etc.

Needle Needle system

DBx

I

used

# 9 #II #14 #16 #18

for

The

light· to medium-weight

standard threads used with the models are

Thread

count

#80

#60

#50

#50-#30

general

Georgette, T/C broadcloth Light-weight mate.rials Wool, general broad Drill,

cotton

Overcoating, denim

fabrics

Material

gaberdine

in

men's suits, ladies'

cotton

or synthetic fiber threads

cloth

wear,

working

Medium-weight

General

Heavy-weight materials

wear,

of

#80 to #30.

Application

materials

fabrics

students'

--

-2-

3.

STANDARD ADJUSTMENT

STANDARD

(1) Height

With the needle bar line on the needle bar according to the type

of

the needle bar

in

its lowest position, align the bottom end

~®

I

(2) Timing between the needle and the

When the bottom end bar aligns with marker line

that hook point 0 meets the center

a clearance between the needle and the hook point.

ADJUSTMENT

of

needle used.

~o

€l

hook

of0.04

of

the bushing with the appropriate marker

(For a

DB

needle) Align the bottom end bushing needle bar

(For

Align the bottom end bushing needle bar

of

the lower bushing

(@

(0.002") to O.lmm (0.004") should be provided

aDA

or

~

with marker line

f)

needle)

~

with marker line @ on

f)

®)

on the needle bar, adjust

of

needle 0 . At this time,

of

needle bar

.

of

needle bar

.

of

the ascending needle

fi.)

on

so

(3) Height

Feed

(4)

I/777/J

of

the feed dog

timing

Needle

Feed

dog

V/Z//1//,

When the feed dog is the top edge

(0.028" to 0,031" )

0.7-0.8mm (0.028'"-0.031

of

in

the feed dog is 0.7 to 0.8mm

above

")

=~~

Throat

plate

When the front 1st or 2nd tooth

throat plate surface, the upper end needle should be flush with the throat plate surface.

Throat

plate

of

the feed dog

of

the eyelet

its highest position,

the throat plate

is

flush with the

of

surface.

the descending

-3-

HOW

TO ADJUST

RESULTS OF IMPROPER ADJUSTMENT

o Loosen the needle bar clamp screw to perform adjustment.

0

Loosen the three

(A

version without the automatic thread trimmer has two

hook

setscrews to perform adjustment.

setscrews.)

Changing the needle bar height

o

disturbs the feed and hook timings.

So, avoid altering the needle bar

height unless the type

of

needle has

been changed.

If the clearance between the needle

0

and hook blade point is too large, stitch

or

skipping

thread breakage may

frequently occur.

o

If

the clearance between the needle

and hook blade point is too small, the

needle

may

scratch

the

hook

blade point.

If

the

hook

o

timing is advanced, tighter stitches will be produced, but

stitch skipping may often

occur.

o A delayed

hook

timing

is

effective for preventing balloon stitches and stitch skipping.

o

For

a version without the auto· rna tic thread trimmer, use the lowest marker line to make adjust-

rnent.

0

Loosen screw

f)

,

and

move driving forked

adjustment.

(The

distance betwce> the

standard feed dog So,

this may be used for easier adjustment.

(81613-450-AOO)

o Loosen the two setscrews

top

of

and

crank 0 to

bottom

ends

of a tooth

is

about 0.8mm (0.031").

make

of

th)

the feed eccentric cam. o

o

If

the feed dog is too high, the needle may sway and possible bend or break.

the contrary,

On too

low, insufficient feed power

may

result, often causing stitch

if

the feed dog is

jam. Increasing the feed dog height adds

but

to feed power, time, chances

also increase.

If

the feed dog descending timing is advanced, chances

at the same

of

puckering may

of

thread

splitting, balloon stitches

will be

reducect;ho~ever,

stitches will be loose.

-4-

STANDARD ADJUSTMENT

(5) Tilt

of

The standard tilt

A

of

Front up

_,_fvvvv,__:_=·

[Note] The tilt

(6) Walking

Type

BA,

BB,

D

the

feed dog

of

the feed dog is obtained by aligning the marker

the feed rocker.

Standard

.A•

,--_:_f"""""JL__.

1

foot

of

E

_

__i_---'i~£!.:_j..L

of

the feed dog

pressure and presser

gauge

Height regulator knob

BC

Front down

Throat

plate

of

the

DLU-5490N

foot

pressure

A B

of

presser spring

43 43 43

Height

cannot

of

adjusting

50 50 50

be

adjusted.

dot

on the feed bar shaft with point

A

J

L

M

N

p

s

(Standard adjustments)

[Note

I]

The suitable pressures So, properly adjust the pressures for each type

[Note 2] Distance B represents the height

adjusting knob

If

screw. presser spring regulating nut distance

slot in the presser bar base may be impaired. So

is

you do not have a scale etc., take the position where the white marker line on the

B.

If

the walking foot adjusting screw is excessively tightened, the durability

43 43 43 43 43 43

ofthewalking

depressed until its top end

is

50 50 50

50

Adjusting nut

foot and presser foot vary, depending on the type

of

material.

of

the walldng foot adjusting screw when the walldng foot

is

engaged with the pin

aligned with the snap ring (colored in silver)

be

careful.

of

the walking foot adjusting

as

a reference for

I

R

of

material.

oft

he

-5-

Loosen

shaft

to

the

setscrew

perform

HOW TO ADJUST

of

the feed

adjustment.

bar

shaft,

and

tum

the feed bar

feed dog

Setting

IMPROPER

it

RESULTS OF ADJUSTMENT

0

Setting up

the

is effective for preventing

puckering. down

reduces chances

breakage when sewing knit.

with

its

front

with its front

of

fiber

0

A :

Turn

the

pressure,

0

B : Bring the presser

contact with the throat plate surface, push the walking foot adjusting knob down, and turn the walking foot adjusting screw clockwise to increase the walking foot pressure, or

counterclockwise to decrease

presser spring regulator clockwise or

counterclockwise

foot

down. With the presser foot sole in

to

decrease it.

it.

to

iilcrease the

The

standard adjustments depend

o

on

the

type

of

material.

The pressures and

presser

to

the shirring capability

of

the walking

foot

are closely related

machine.

When· the walking

kept

constant, the shirring capa-

bility

is

enhanced as the presser

foot

pressure' is-decreased.

When the presser

kept

constant,

foot

pressure

foot

pressure

the shirring capability is enhanced as the walking foot

pressure is increased.

If

the presser low, however, be decreased, leading

If

the walking foot pressure is

high, the walking

foot

pressure

the

feed power

foot

to

may

stitch

the material.

As

the

sewing speed the feed power reduces. crease the presser

sewing at high speed.

when

is

foot

increased,

So, in-

pressure

of

the

is

scratch

foot

is

too

will

jam. too

-6-

STANDARD ADJUSTMENT

(7) Relationship between

the

walking foot graduation plate and indicator

With the partial shirring stopper indicator set at foot graduation plate, when the top feed adjusting knob

clockwise to set the indicator at the'maximum value, the top feed

indicator should align with plate.

Partial shirring dial

Dial

"8"

on the walking

"8"

on the walking foot graduation

Stopper indicator

Top feed indicator

is

turned

(8) Top feed vertical timing

With.

the dial set at

"3",

at

turn the hand wheel by hand

"3"

and the top feed indicator

direction. The moment the presser foot sole

touches the throat plate surface, the top feed

go

dogs should start to

up.

in

the normal

0

Screw

Driving

roller

-7-

HOW TO ADJUST

0

With the indicator set at the maximum value, loosen the screw, at the rear indicator with

of

the machine arm.

"8"

on the plate. Retighten the screw.

Move

the plate to align the

RESULTS OF IMPROPER

ADJUSTMENT

0

If

the relationship between the

walking foot graduation plate

and

the indicator

it

is

difficult

is

not correct,

to

know a proper to

feed amount.

o Remove the side cover from the back

loosen

the

screw.

of

the sewing machine,

Tum the handwheel until the presser foot sole touches the throat

plate surface. Lightly press the driving roller driving arm (front)

of

the walking foot driving arm.

in

direction

A,

and securely tighten the screw

of

the walking foot

After adjustment, check the walking foot dog for proper motion.

[Precaution]

is

The top feed vertical timing

timing. The timing may

the bottom feed timing has been changed,

(I)

the lift

of

(2)

(3)

a

gauge

the bottom feed dog has been changed, or

has been changed. feed power.

Avoid adjusting the top feed vertical timing

factory-adjusted to the standard

be

somewhat disturbed

as

when

much

as

possible.

and

o

If

the walking foot and feed dog

start to

foot comes in contact with the

throat plate,

decrease.

after the presser foot comes in

go

up

before the presser

shirring

If

they start to

amount will

go

contact with the throat plate surface, the upper cloth

will

pushed back, resulting in decreased

shirring In

the

amount.

former

case,

the

presser

may bind with consequent reduced

up

be

bar

-8-

STANDARD ADJUSTMENT

Max. lift A

of

each type

of

walking foot

the following values, recheck the adjustment.

(9)

Top

feed horizontal timing

Cam

screw

No.2

is

as

shown below.

If

the max. lift

BA-

BC

E

D

J

M

p

s

o With the needle bar in its highest

)mziiiif.:=-Aiigned

is

significantly different from

types

types types

Approx. 3mm

Approx. 1.6mm

(0.118")

(0.063")

types Approx. 2.7mm (0.106")

types

Approx. 2.4mm

position, the

should

cam

be

slightly below the main

screw

(0.094")

No.2

shaft axis. The cam screw

No.2

reaches

the main shaft axis when the color boundary line

of

the descending needle bar aligns with the bottom end

of

the needle bar lower

bushing when the handwheel

is

turned in the nonnal direction.

( 1 0) Longitudinal position

With the top feed amount set

at

provided between the front end

Roller

Feed

rocker

bar

0

of

the walking foot

the maximum

of

the slot in the walking foot mount and the roller.

(8

mm (0.315")), a clearance

of

Ll

mm (0.043") should be

Feed rocker

shaft crank

(lower)

-9-

HOW

TO ADJUST

o Loosen the screw

No.2

first, and then the screw No.

l.

the screwdriver applied to the screw, slowly turn the hand wheel

not

with care taken the screw

adjustment,

No.2

securely tighten the screws.

(Fig, 1) (Fig,

to cause the cam

to adjust the

top

to

move. Loosely tighten

feed horizontal timing. After

2)

With

RESULTS OF IMPROPER ADJUSTMENT

o

If

the walking

high, the needle

foot

bar

goes

up

may hit the

walking foot when the presser

rides over an overlapping section. Also, the

will be as shown in Fig.

path

of

the walking

I, means reduced walking foot feed power. If

the walking high enough, its shown in Fig. 2. walking

foot

may damage

foot

path

As

does

not

will be

a result, the

back the material.

(Fig,

1)

o

If

the horizontal feed timing

foot

is

walking bottom

the

upper

earlier than the

feed, the walking foot pulls

cloth

(Fig.

back before the feed dog completes its feed often

causing scratches

material

contrary,

the walking upper

or

poor

if

the timing

foot

cloth

when the feed dog

feeds the material,

scratches

(Fig.

on

the materiaL

I)

The horizontal feed

of

timing

on

shirring. On the

is

too

fails

to

feed the

often

causing

the

walking

will be delayed.

2)

(Fig.

The horizontal feed

timing

of

the walking

will

be

advanced.

too

foot

which

go

up

as

or

push

2)

of

motion,

the

late,

foot

the

o

Turn

the

top

feed adjusting

the

maximum

("8"

on the

until the horizontal feed bar reaches its front

of

in the direction feed rocker shaft Move the feed

the

crank

rocker

clearance between the slot

roller

to

1.1

mm

(0.043").

knob

to

set the

top

feed scale).

arrow), then loosen

(lower)

bar forward

to

release the feed rocker bar.

or

backward

in

the walking

top

Turn

the

foot

end

screw

to

mount

feed

amount

the handwheel

position (shown

of

the'

adjust the

and the

at

After adjustment, tighten the screw.

-

10-

If

the longitudinal position

o

foot

is

walking feed

components

inaccurate, the

may

interfere

with each other. After adjustment,

top

feed

set the maximum, and components between

for

them.

amount

check

any

at the

the

contact

of

the

top

STANDARD ADJUSTMENT

(11) Normal and

The ratio

(12) Position

reverse

of

the nonnal feed pitch to the reverse

of

the

feed pitches

reverse feed solenoid

With the stitch length dial set at 3 (0.118")

feed side. the end surface

Reverse feed solenoid

When

the plunger

of

the solenoid.

is

to

3.5mm (0.138"), press the feed lever down to the reverse

pushed in direction

Rubber plunger

feed

pitch

is

90 to

105%.

A,

the rubber plunger should come in contact with

Oil

pump

screw

-II-

HOW TO ADJUST

RESULTS

ADJUSTMENT

OF

IMPROPER

o Loosen the setscrew

of

the feed regulator pin, and turn the

regulator pin using a hexagonal spanner to perform adjustment.

0

Feed regulator pin

o Loosen the oil pump screw about a half turn, and slightly

so

loosen the oil pump support using a spanner

can

be

solenoid

moved.

that the

Loosely tighten the solenoid setscrew, and lightly tap the solenoid to make adjustment. After adjustment, check the

plunger for

smooth

motion.

Securely tighten the oil pump support solenoid setscrew, and then tighten the pump setscrew.

feed

o Incorrect

nonnal

& reverse feed

pitches will cause defective stitches

of

at the time

Precaution:

If

there

reverse feed stitching.

is

a significant difference

between the top and bottom feed

amounts,

not adjustment, set the ratio feed to bottom feed to

o

If

accurate

be

made. So, when making this

adjustment

of

1:

the solenoid

is

positioned too

1.

much to the left, the reverse feed

be

pitch will If

the solenoid

3mm (0.118") or less.

is

positioned too much to the right, the solenoid will fail to work properly, leading to

uneven

reverse

feed

stitch

lengths.

can-

top

Precaution:

Never loosen the oil pump support more than necessary.

-12-

STANDARD

ADJUSTMENT

(13) Position

'.

''

'

Wiper lever A

Wiper setscrew

Needle entry point

of

the wiper

Curve center

~m

(O.D20")

I)

The curve center

aligns with the center

ne"edle

entry point.

2)

When

wiper lever A

the

direction

clearance

of

0.6mm (0.024")

of

the wiper tip

of

the

is

pressed in

of

the

arrow,

0.3 (0.012") to is

provided bet-

ween the walking foot and the

of

presser

the wiper.

foot

is

O.S_mm

bottom end

3) The clearance between the wiper

and

the

(0.020") or less.

or

less

a

(14) Position

When

the feed lever

scale

at 113",

(When

the normal feed pitch is set

of

the

PF-6 partial shirring stopper

is

set to the reverse feed side with the stitch length dial set at

clearance

between

Walking foot lever collar

the

Clearance

to

"3")

walking

roller

foot

lever

collar

and

(When

the reverse feed pitch

the

wire

"3"

and the top feed

roller

is

zero.

Walking foot lever collar

Wire roller

ls

set

to

"3")

-13-

HOW TO ADJUST

RESULTS OF IMPROPER

ADJUSTMENT

o Loosen

the direction

setscrews

bend the wiper so

the

Setscrews of wiper lever B '

setscrews

of

wiper

of

wiper

lever

B,

and

press

the

arrow.

lever

that

With

wiper

lever

B.

If the wiper hits

it does not touch the walking foot.

' \

~~

c

-=

'

wiper

lever A in

A pressed, tighten the

the

walking foot,

o If the wiper

ed, the wiper

or

foot

needle

is

improperly position·

may

hit

the walking

bar.

o

Move

the stopper screw

adjust the clearance to zero, then lock the nut.

-em

under

lllcmm

-"f--li

the

table

d)l

''"'

C

(J

JtU&ItummttiiiW

~Nut

{~,,

*

If

the feed stitch used

knee pad (or pedal) play can

reverse

feed

control

perfom1ing the above adjustment.

lever

~Stopper

is

limited to 3mm (0.118") or less, the

be

reduced by setting the

for

the

reverse

forward

screw

feed

and

or

backward

by

to

o If

the

clearance between

roller and the walking foot lever

collar

is

too large, the partial shirring pedal have a large play, preventing easy

operation.

If

the contact between the two

is

parts

amount

will

be reduced, possibly causing

scratches on

(or

too tight, the top feed

for

reverse

the

material.

the

knee pad) will

feed

stitching

wire

-14-

4. DISASSEMBLING

AND

REASSEMBLING PROCEDURES

(1) Disassembling and reassembling

the

face and top feed components

DISASSEMBLING PROCEDURE

I.

Remove the presser spring regulator.

{The guide bar has been installed.)

2.

Remove Remove

foot.

Loosen

3.

presser bar position bracket.

Remove the thread guide and filler plate from the presser bar position

bracket.

4.

Detach the needle. Loosen set-

screw

foot.

5.

Remove roller and

6.

Loosen the presser and

remove the After the pin has been drawn out, keeping the presser bar held pulled

up, press up the feed driving rod so

that it

the

presser

the spring from the walking

screws 0

@')

, and remove the presser

the

snap

shaft,

and remove

the roller

pull the presser bar upward to

pin. Presser

is

drawn out from above.

ring

shaft.

nut.

and@

from

bar

base

in the

the

Loosen presser bar position bracket

and

draw the presser bar upward,

and the presser bar and the presser

bar

position bracket will

7.

Take

out

the

three

setscrews 0 ,

screw

(j)

. This will allow

rocker bar bushing

down

and removed.

rubber

come

cap, remove

and

loosen

the

to

be

pulled

the

roller

screw

off.

feed

set.

0

REFERENCE DIAGRAM-

'l!F-H!r'--. Presser sprihg

'l

regulator

nut

bar

PRECAUTIONS

o

If

the

presser

nut

is

and

cannot

easily, apply a cloth

the knurled part

pliers, and

o

When

guide from the presser position bracket, take care not to

thread guide.

o

Never bar stopper screw. Remove the presser bar. (The presser bar stopper screw works as a reference when assembling the relevant components.)

Presser bar

Screw

be loosened

of

turn

the

removing the thread

damage

loosen the presser

the

it

together with

stopper

in presser

bar

tight

to

nut.

bar

screw

f)

base

Roller shaft

-15-

DISASSEMBLING

PROCEDURE

REFERENCE

DIAGRAM

PRECAUTIONS

8. The components

of

the

feed

bar bushing can be disassembled by

removing the snap ring

However, ble only the necessary components for easier reassembling.

it

is

advisable to disassem-

as

illustrated.

rocker

o The gasket

contact with the machine arm, so use great

ing

it,

crack.

is

in

close

care

when remov-

otherwise it may

o The gasket has been

attached to the feed

rocker bar bushing with

adhesive, so they can-

not

be

separated.

o

Be

careful not to loose

the roller snap ring, the feed driving rod roller snap ring, and the

walking foot presser

snap ring.

rings has been scratched or opened when ing them, do not use

If

the snap

remov-

them.

9.

The feed rocker shaft can be pulled out to the front and removed by loosening the setscrew

of

the feed

rocker shaft crank (lower).

Feed

Feed rocker

shaft crank

(lower)

Feed rocker

shaft bushing

Feed rocker

shaft bushing

rocker

shaft

-16-

ASSEMBLING PROCEDURE

o Assembling

ponents

Put

the

top

feed rock shaft bushing, remove

their thrusting play by adjusting

feed rocker

and

fix

llation. Install

bushing

tighten support part

to

the plate, screw

o Assembling the presser bar com-

the

feed rocker com-

top

feed

rock

shaft

crank

them

for preliminary insta-

the

feed

unit

from

the

three

setscrews

plate.

Then,

fit

of

the

feed rocker

bottom and securely tighten of

the

face

feed

of

orcker

shaft

into

(lower),

rocker

bottom,

of

the

bar

bushing

the

support

the

bar

ponents

Put the presser bar

place the presser bar position bracket

on

the lifting plate and

the slit on the machine arm. Position the presser bar stopper screw so that insert the presser bar presser bar base so that the top

end

of

the presser bar projects approximately 0.5 under the bottom

Then, put the feed driving rod

in

the presser

Insert the feed driving rod pin into

the slot also into the slot and the upper hole driving rod so that the pin

on the pushing arm Put the feed driving rod on the forked part mount, install the roller and the

roller shaft, and the snap ring.

Screw the presser foot onto the presser bar base, check the needle entry point, and tighten the screw. For thread trimmer, assemble the components so that the end the (0.020")

the presser bar base. For thread trimmer, assemble them so

that the end

0.5mm

face

in

the

a version with the automatic

presser bar protrudes 0.5 mrn

from

a version without the automatic

(0.020")

of

the presser bar base.

in

presser bar base,

fit

them in

it

faces frontward,

in

the

mm

(0.020")

of

the base.

~ar.

feed driving rod and

in

the presser bar

in

the feed

is

as

illustrated (b).

of

the walking foot

nx

them using

the

bottom face

of

the

presser bar

above the

placed

of

bottom

the

bar and

the

stepped

set-

bushing.

of

is

REFERENCE DIAGRAM

Plated screw

screws

{black)

Face plate side

rocker bar bushing

qf

\~

(a)

Feed

driving

rod

Presser bar base

J 0.5mm (0.020")

Be

ing hole in shaft faces exactly

Of setscrews, the black.

support

plate

Ascertain that the walking

foot

against the feed driving rod. If bad, the rocker

After

(b)

(for version with automatic thread

trimmer)

0.5mm {0.020") (for version

trimmer)

without

to screw

out

in

automatic

PRECAUTIONS

sure

that

the

three

support

two

operator's

base

is

not pushed

the

needle

entry

correct

it

position

securely

of

bar

bushing.

adjustment,

tighten

of

the

bushing.

thread

lubricat·

feed

rocker

upward.

screws

side are

point

by

adjusting

the

feed

be

the

plate

on

is

sure

-17-

ASSEMBLING

PROCEDURE

REFERENCE

DIAGRAM

PRECAUTIONS

When tightening the screw

er bar base, be sure

ces on

both

sides are equal as illustrat-

ed. Apply the bracket plate bar guide bracket, and presser bar thread guide in parallel

the presser bar guide bracket. Then, adjust the position

bar position bracket so that

15

approximately top face

Fit the presser bar position bracket

support plate in the slit on the presser bar stopper and tighten the presser bar position bracket clamping screw.

At thiS-tline, the presser foot should be

in Put presser

unit.

Lastly, install all

regulator, washers and springs.

The lift

4.5

When the hand lifter is lowered, the

clearance between the the support plate and the lifting lever should be (0.039").

in this range, check the assembly dimensions. The height foot

If the height

correct it according adjusting the walking

of

contact

with the

the walking

bar, and tighten the presser

of

(0

.177")

0.5

is

2.7 (0

mm (0.591 ")from the

the presser bar bushing.

foot

the

the presser

to 5 .5

(0.020")

If

the clearance

of

the BB-type walking

.l

06")

is

not

of

the

press·

that

the

clearan-

to

the presser

attach

the

of

the presser

it

is spaced

throat

plate.

spring in the

presser spring

foot

ranges from

mm

(0

.217").

bottom

to

3.2mm

within this range,

to

the

foot

to

face

l.Omm is

not

(0

step

for

height.

with-

.126").

to

of

Clearances

o When the walking

o

o (When checking, be

:K

l Th;n washer

1....----

§

~Presser

M -Presser

Guide

"'Thick

bar

spring

washer

spdng

nut

foot is raised should come down onto surface. come cause

overtightened. ly retighten the screw. Note bar turns when the

presser bar guide ket In

twist

it

keep from the presser base loosen the clamping screw bar

re-tighten screwdriver.

sure foot counterclockwise, apply walking foot spring, and not spring.)

Loosen the presser bar base setscrew once,

then

Then the presser bar base will come smoothly

and

released,

the

throat

If

it does

down,

it

is

the

screw has been

Proper-

that the presser

is

tightened.

order

to

eliminate

of

the

presser bar,

is

very effective to

your

hand

components

in

the presser

base

and

then

it

using a

to

turn

the walking

adjusting knob

any

tension

to

install the presser

retighten it.

down

without

plate

not

be-

brac-

away

bar

and

not to

jarring.

it

the

to

-18-

(2) Disassembling and reassembling

the

top

feed drive mechanism

ASSEMBLING PROCEDURE

o Remove the side plate and the four

rubber caps illustrated.

Remove rubber cap

lever, and loosen setscrew

Put the screwdriver

hole, and loosen setscrew 0 .

Then, remove

stopper mount and the stopper

indicator. Insert the screwdriver between the

lever bush and stopper indicator, and pull them with the screwdriver.

This

will

detach the lever from the

as

lever bush

The adjusting link spring and the

top feed converting arm can

removed.

illustrated

in

the

spring from

f)

from the

e)

the lower

in

Fig.

.

the

A.

be

REFERENCE DIAGRAM

PRECAUTIONS

(

Be

careful rubber ring. Do not remove the lever

bushing from the arm.

not

to break the

o Loosen the feed rocker shaft crank

(upper)and the walking foot

screw, then loosen the four thrust collar setscrews.

This

will

allow the walking foot rock

shaft to be drawn

When the screws are loosened, and

the shaft link can

Loosen the screw and remove the

walking foot pin the walking

be separated from the walking foot driving rod.

is

be

off

dislocated, the adjusting removed.

C.

By

foot adjusting link can

ann

to the rear.

so doing,

set-

Stopper

Walking

indicator spring

foot

arm

I

Feed

rocker

crank (upper)

shaft

-19-

ASSEMBLING

PROCEDURE

o Assembling the reverse feed shaft

Remove the reverse feed

control

lever and the adjusting link spring,

then loosen the cam screw.

o Assemble the walking foot adjusting

link as illustrated Adjust walking

A and B

to clearances (E) between the ing

foot adjusting link and the

ann,

the fix the shafts.

at

right.

foot

fulcrum shafts

provide equal lateral

walk-

REFERENCE

Walking

adjusting link

foot

DIAGRAM

I,

PRECAUTIONS

Feed

_

It

is

advisable

the spring only

spring

hook

side for easier

installation

that

reverse spring

Feed

spring

to

release

on

the feed

follows.

hook

Connect the walking

o

rod with the walking ing link, using walking

foot

driving

adjust-

C.

o With the reverse feed shaft installed

as illustrated in Fig. A, insert

shaft

into

the

reverse feed bushing.

Let

the

end

of

the shaft project

about

20

mm

(0.078") from

reverse feed bushing, adjusting link spring,

the walking

as

illustrated by

foot

attach and

adjusting arm

the

broken

Fix. the lever shaft using

the

install

line.

the

thrust screw.

Hook

the left link spring ann

pin as illustrated

end

onto

of

the

fee<)

at

adjusting

driving

right.

Walking Walking

Walking

Walking shafi

A

spring

foot

driving

rod

foot

tuiC"""'-

~~

Cam

Cam screw

Walking

fulcrum

shaft

<o

"oo"

B

h<.

foot

When inserting the walking

o

foot

lever shaft into the

reverse lever bushing,

(

careful

not

to

break

be

the

rubber ring.

o

Put

the bushing pin in

the forked part

Bushing

of

the

lever.

Feed driving arm pin

-20-

ASSEMBLING

PROCEDURE

REFERENCE

DIAGRAM

PRECAUTIONS

Turn

the

walking

arm

in

the direction

fit

the

forked part

ing link

preliminary installation.

o Assembling

shaft

Insert

into walking rear bushing, walking thrust collar, the feed rocker

(upper)

Make

project

from walking foot walking When tightening sure

opposite

plate, and

so that it does not come in

contact

pin,

the

am1,

foot

in the

the

about

the

left

foot

that

screw

direction from

with

foot

onto

and

fix

the

walking

tighten

foot

walking foot

shaft thrust collar,

front

shaft

order

foot

O.Smm

end

of

ann,

and

shaft trust collar.

the

No.2

the

pipe

adjusting

of

the

arrow,

the

adjust-

them

for

foot

rock shaft

ann,

foot

shaft

bushing and

crank

they

are listed.

shaft

(0.020")

the

fix

the

screws, be

faces in

screw No. 1

support.

the

side

Walking

0.5mm

1tl0.020'')

[

®IL-ujL-1

Walking

foot

~

foot

shaft

arm rock

thrust

cottar

1----'@\&>-.s

c

Walk;L

foot

shaft

After tightening preliminary the

walking

arm

should be gradually turned. done by tilting

machine head so

side plate faces

Be

sure surface faces

Pipe

prevent

tube from coming

with

installation, foot

This can be easily

the

upward.

that

the

of

the

thrust

the

bushing.

support

the

works

the

circulation

screw.

them

for

adjusting

that

the

ground

.::ollar

to

in

contact

o Fix

the

circulation pipe

bushing side, using

o

Attach

the hole cap machine arm.

Install the pulley.

o Set

(0").

the

from

bottom

walking

the

feed

the

foot

rear

pitch

on

tube

rock

of

the

support.

shaft

the

to

Omm

Rock

shaft bushing (rear)

7

,..L

-

-'---

Walking

/'

,y{,.

....

\

Circulation pipe

-21-

foot

arm

"

ASSEMBLING PROCEDURE

REFERENCE DIAGRAM

PRECAUTIONS

o Set the

top

feed pointer at

the walking foot graduation plate,

align walking walking

the walking o Tighten the walking o When the needle

position, screw

should be slightly lower than the

axis

of

When

foot

A with

foot

pin B, and tighten

foot

adjusting

bar

No.2

ann.

foot

ann.

is in its highest

of

the

the main shaft.

the color boundary line on

the descending needle bar aligns

of

with the bottom end

the needle bar lower bushing when the wheel

is

turned

in

the nonnnl direc-

tion,

the cam screw

of

the main shaft.

axis

the

o Install

spring, adjusting link spring and

stopper Set the partial shirring dial

o

bottom

reverse feed control lever

indicator

feed dial at

No.2

spring.

"3"

meets the

and

feed dial at the maximum value,

"8".

o Tighten the feed rocker shaft

(upper)

crank

of

the

closest to

of

abo;It

between

(upper)

crank

mounting

cover

so

that,

top

feed shaft has come

the

side plate, a clearance

5.5mm(0.217") the

feed

rocker

and

the

surface).

when the

is

shaft

arm

(side

"0"

on

cam

hand-

at

"8",

top

end

provided

Walking

B

About

foot

Aligned

0

5.5mm

Walking

I

Walking

foot

graduation

plate

Before making this adjust· ment,

be sure

positions

€}

are as illustrated.

A

(Caution)

If

the

walking

adjusting securely fixed, the screw

may auto-reverse works. Be sure to fix the walking ann

fim1ly using a large

screwdriver.

At this the space the

roller in the walking

foot

mount

that

of

0 ,

foot

arm

is

loosen when

function

foot

adjusting

time,

be sure

on

either side

is

equal.

not

the

f)

and

that

of

-22-

(®11°1

t~

Equal

ASSEMBLING

PROCEDURE

REFERENCE

DIAGRAM

PRECAUTIONS

o How

Caution

DLU-5490N

If feed stitching, the walking foot adjusting pin may or adjustment

So

[Check

to

adjust the trajectory Make sure about 3 mm throat bottom (0.1 18"). (See page 7-(8))

Position and the feed dog comes in with the presser the advancing walking touches the thr.oat plate, and the feed dog starts

from the throat plate surface when the walking foot starts to go up.

the projecting amount

the walking foot adjusting arm

as to avoid these troubles, take

that

the walking foot

(0.118")

plate. Set

feed pitches at 3 mm

fix

with

or

of

the walking foot

whether

above the

both

top

the

cam so

contact

foot

sole when

foot

to

go

respect

-5490N-7

of

the adjusting link stopper screw, when the DLU-5490N or-5490N-7 performs reverse

the

and

down

to

mechanism

adjusting

is

that

Feei::l

the

adjusting

may

interfere with the adjusting link stopper screw resulting in failed

or

preventing the feed lever from returning to the

care

of

the following.

link

1

I. Set stitch.dial {!) to 0 (zero). Adjust the top end

'-~-j-

------+--10.118")

About 3 mm

);2)

~

and

stitch

link

come

off

stopper

How

to

check

indicator turning walking foot adjusting

~

Feed

start

stopper

the forked portion

has

·G

to 0 (zero) on walking foot graduation plate ·0 by

screw

been

improperly

For

the

standard

of

the cam, refer

Standard Adjustment (9).

position

to

of

the walking foot adjusting arm

home

position.

adjusted.]

of

stopper

~dial0

.

Adjusting link stopper screw 0

Adjusting link stopper nut 0

0

c

,

'

Arm 0

Walking foot link

(Caution)

At

this

time,

it

the

marker significantly graduation not

been

re-adjust

2. Turn stitch dial 6 to position

3. Press feed lever down further to ascertain that there portion A between adjusting link stopper screw 0 and

surface At this time, also check that top surfaces walking foot links are clearance re-adjust to remove the clearance following the adjusting procedure described below.

2

How

to adjust

Loosen

Carefully walking reverse

nut@

stitch dial{!)

fully depressed

screw 0 to allow machine arm

firmly tighten

(Caution)

deviates

plate€),

properly

the

of

arm

in

portion A, troubles may occur. So,

remember

foot

feed

adjusted.

feed

mechanism.

by

0 .

all

in

the

adj~sting

to

3.

Keeping

by

hand, tighten adjusting link stopper .

it

0 to come

0(no

clearance exists

nut@.

that

and

the

stitching

point

from

suppose

reverse

the

3.

hand until

is

no

leveled.

link stopper. Set

the

feed

in

the

feed

mode

is

on

the

graduation

that

the

So,

it

is

necessary

it

will go no

clearance

of

If

there

lever held

contact with

in

portion A) and

reverse

amount

3

mm

at

feed

in

four

is

a

feed

the

feed

lever

on

walking

mechanism

to

properly

amount

under

the

maximum.

foot

has

of

the

automatic

-23-

5.

HOW

TO REMOVE

To

assure

smooth

Remove play according

operation

PLAY

of

the sewing machine, it

to

the

following procedure.

is

necessary

to

remove

any

excess- play from

components.

HOW

TO

REMOVE

(1) How

to

remove play from

walking

Loosen

the (upper), Then

foot

the

feed rocker shaft

and

remove

rock shaft

walking

the

setscrew.

the

holder

foot

screw, position the thrust

collar screw so loosened easily

(2}

How

to

the

walking

link

Loosen foot fulcrum walking foot fulcrum shafts (A) and

(B)

the

walking

not

does ing

foot

that

to

remove play.

remove play

foot

adjusting

the

two screws

shaft,

to

remove play so

foot

adjusting link

interfere with

am1

and

walking

it

from

and

driving rod.

Retighten walking

If the adjusting link does

move play, it walking foot driving rod binds. rect this, loosen walking foot

main shaft

After roller for correct positioning, and arm.

solve

position

the screws

foot

fulcrum shaft.

smoothly

is

foot

readjustment, check

then

If

this readjustment fails

the

after

removing

probably

to

fix

problem, correct

of

the cam.

because

arm

or

the

screw

ann,

and

make readjustment.

the

walking foot

PLAY

arm,

crank

may

of

adjust

the

of

two

not

walking

To

turn

the

be

walking

that

walk-

foot

the

corof

the

to

the

REFERENCE

Walking

0.5mm

1t(0.020")

t

@0'1

DIAGRAM

foot

shaft

,--..

Walking

foot

arm

-;1tJ;-

A B

v

Fulcrum

shaft

PRECAUTIONS

thrust

collar

By.

avoiding disturbing

feed

rocker

bar

shaft,

the

need for

adjustment

foot

of

stroke

can be eliminated.

and

the

main

the

walking

~@''f.,__

Walking

rock

foot

shaft

-24-

HOW

TO

REMOVE

(31

How

to

remove play from

reverse

feed control

Remove play from the thrust collar

of

the

reverse feed control

Be

careful

lever. the thrust collar too tight, wise the lever cannot smoothly.

(41

How

to

remove play from

reverse

feed control

Loosen the screw

or 3 turns, and

A and

B. between reverse feed control lever and

collar (asm), and remove

Loosely tighten the screws A

B,

but securely tighten the

and

not

of

also

Insert a screwdriver

the

walking foot lever .

screw.

After that, securely tighten

Screws A and

B.

PLAY

the

lever

to

tighten

other·

be

pressed

the

lever

shaft

the

thrust 2

loosen screws

the

play.

REFERENCE

Thrust collar

Screws A and 8

DIAGRAM

&:rew

PRECAUfiONS

(Caution) The setscrews A

the

feed lever boss are

likely

to

loosen. So

securely tighten them

without fail.

and

B in

-25-

6. HOW TO ADJUST THE

Be

sure to

check

th.e

following

TOP

FEED DRIVE MECHANISM

after

disassembling, assembling

or

removing play:

(1)

Trajectory

o The presser

is

15

top

end

O

The (BB type)

3.0mm(O.ll8') plate.

-------+=12..?-3.0mm

CHECK

mm

sole

ITEM

of

walking

bar

guide

(0.591

")above

of

the

bushing.

of

the

walking

is

2.7 (0.106') to above

(0.

foot

'""'·"·'

bracket

the

foot

the throat

'""'

ADJUSTMENT

Remove the side cover.

Turn the main shaft

in

the normal direction

until

the driving

(front)

to

the

comes closest

side cover.

Place a 3 thick

under

walking

foot,

the screw driving arm contact

with the pin

the screw

am1

mm

(0.118")

the

loosen

of

the driving amr

(front)

so

of

the driving arm( front).

PROCEDURE

Driving

arm

(front)

(front),

that

the

driving presser

and

the

driving

& REFERENCE

Stopper

Bracket

Bushing

~1-+-JA

and

adjust

the

arm

(front).

Securely tighten

DIAGRAM

Walking

driving

position

lightly comes in

of

the

foot

rod

o There

(see of

the

is

no "pu.sh" or

the

figure) in

walking

foot.

the

trajectory

"return"

When the needle highest position, No.2

of

cam should be slightly lower of

the

main shaft.

than

bar the

is screw

the

in its

axis

With this standard position in mind,

make adjustment

to

obtain the appropriate position.

~ush

Return

o

The

is

too

walking

low,

Push

Returnin

trajectory

foot

Bad trajectories

Push

o The cam

/-----/

7}

timing

is bad,

Screw

Good

No.2

trajectory

-26-

CHECK

ITEM

ADJUSTMENT

PROCEDURE

& REFERENCE

DIAGRAM

(2) Position

of

the

roller

The clearance between A and the roller

is

1.1

mm (0.043") when

the

handwheel

is

turned with

the walking foot scale set at 8 mm (0.315").

Roller

shaft

Feed

rocker

bar

Walking

o Loosen the screw

foot

mount

of

the feed rocker shaft

crank (lower), and perform adjustment.

{Precaution)

Clearance between feed rocker shaft crank (upper) and the side

cover

is

5.3mm(0.208")

Note

that

the

above·mentioned pro·

cedure should not adjustment of

the feed rocker shaft crank

be

applied to the

of

the rocking position

(upper).

Walking

foot

A

Feed

rocker

Walking

shaft

crank

Feed

foot

(upper)

rocker

rock

shaft

Feed crank

Feed bar

rocker

{lower)

rocker

bushing

shaft

-27-

7. REPLACING THE MOVING

KNIFE

(DLU·5490N-7)

Remove the moving knife according

I). Loosen and remove hinge screw

link.

2)

Loosen and remove hinge screw 0

and move the knife forked base and moving knife position as illustrated from the knife forked base.

3)

Move

the

knife forked base and remove the moving knife hinge screw (When removing the mOving knife hinge screw, to

use the exclusive screwdriver (part

which

is

separately available.)

To

allow the moving knife to actuate normally, failed belt tension components near the knife mounting base has to be strictly prevented. It is recommended to frequently clean the components near the knife mounting base.

or

material or thread waste clogging

in

Fig. c. Remove the moving knife pin

to

the following procedure:

f)

of

the moving knife

of

the knife forked base,

to

the position shown in Fig. d,

8 .

it

is advisable

No.11063000000)

in

the

Fig. a

Fig. c

Fig. b

Fig. d

-28-

8.

INSTALLING

AND

ADJUSTING THE

PARTIAL

SHIRRING DEVICE (PF-6)

(1) Description

The

top feed amount can be adjusted by changing the walking foot lever collar. Lower the hook lever collar to increase the top feed amount, or raise decrease the top feed amount. can

be

lever,

changing the bottom feed amount.

In

the PF-6, the hook connected with the kneep pad (or pedal) through a wire so that the top feed

*

For

refer to 8-(2).

* The PF-6

is

type) which are mainly designed for producing large

shirring stitches.

of

the

PF-6 partial shirring device

of

the walking foot

The

walking foot lever collar

moved indeoendently

so

you can change only the top feed amount without

amount

the installing and adjusting procedure for the PF-6,

advisable to use a rake-in type gauges

can be changed using the knee pad (or pedal).

is

designed for performing partial shirring, so

of

the reverse feed control

of

the walking foot lever collar is

(B

type

or similar

it

to

it

Walking

Walking foot lever collar

Wire

(rt

foot

lever collar

sheath

(2) Installing

The PF-6 H-type stand, use the pedals shown

the

stand

other

is

mainly designed to be mounted on JUKI Z-type or T-typ·e stand. When installing the PF-6 on the

than

JUKI Z·type stand

in

the table

of

I~

~

8-(3).

Pedal

connecting

---~

,

!-

~

®"""

arm

(<)

(.G)

The pedal components are assembled The pedals shown above may not be used with a stand pedals suited for the stand, and connect the large pedal to the the connecting rod (lower). Then, connect the connecting rod (lower) to the pedal connecting arm.

as

illustrated above.

other

-29-

than JUKI's.

motor,

and the small pedal to the PF-6, using

In

this case, obtain large and small

(3) PF-6 pedal components

Description Z

Pedal shaft Liner plate

Pedal (small)

Pedal adjusting

plate Pedal (large) Pedal

mat

Pedal adjusting plate

type

stand

GPFOI016000 GPF060

17000

GPF060600AO

GPF06080000

I

1158805

11158904

11158706

Pedal bushing D8!13555BOO 4

Liner plate

Screws

11159001 2

SM9082023SE

WS0861410KR

IVP0871602SE NM6080721 SE SM9061·203SE \VS062121 OKR

IVP0671 0 16SE 4 WP0671

table

-

other

than

show

Pedal

If

you

install the PF-6

thread

support

trimmer

arm

unit

on a machine

and

PF-6, make a recess in the table as

Q'ty

I

I .

I

I I

I

H

type

stand

-

88101232000

88125280000

-

88104012000

-

2

4

2

4

SM9061203SE l\'l\1606000 I SE

-

4 WS0621210KR 5

016SE

88125012000

the

one

which

is

specially designed for JUKI

below to fix the wire

sheath

guide

to it.

Q'ty

I

9

5

4

machine

with

-30-

9. TROUBLES

AND

CORRECTIVE MEASURES

Trouble

Ma.terial cannot be fed prooerlv.

/"

;:::;

a

:..----:;

~-.

1'~'---~

usc

HTypc

rJCondition

HWalking

w

Scratches on material

. . ' .

GJ~·~

'"~~;,.:;_.,

...

,_:;,;,

::<..

"""::...:

~

(Precaution)

Scratches on materials are mainly improper presser foot pressure foot pressure rather than the feed timing. Those scratches· cannot

be on some types materials. For such materials.

it

is

advisable a walking foot and feed dog coated with urethane rubber.

·,

\ \.._ . '

.. /

caused by

or

walking

removed

to

of

Check

Feed dog height

Presser foot pressure walking foot pressure

Walking foot and feed dog

teeth

Top

feed

amount

Bottom

feed

amount

of

material

Remove

the

and then foot

down

by finger when

bar

is

of

presser spring

the check if can be moved up

in its highest

the

regulator spring, presser

and

needle

position.

-ml'ml-

Check

the

walking foot

power by mov;ng it up and

down

by

i1

__

_:_

finger.

_

_c:.._______

foot ascending

L

point

<1nd

presser bar

the

W<~lking

/

the

I

The

The the high in eompmison with the presser foot pressure.

The

The The

Difficult to feed material

The

<~nd

H-

There arc burrs on

.__

teeth

ti;:_~ing

The

The nfter the presser foot sole touches the throat plate.

Check result

feed dog

is

too low.

presser

foot

pressure

is

too

low,

walking

foot

pressure

is

teeth arc worn.

top

feed

amount

is

bottom

feed

presser bar down

unless a force is used.

walking foot pressure

...

_ teeth may bite

\~lki~~j~~;g~~:·

amount

cannot

the

too small.

is

be moved up

periphery.

is

up a little while

or

extremely

too

small.

too

low.

--

too

high. If the walkmg foot pre%urc IS too

L

The

feed power

is

too low.

H

If

the presser foot pressure

come

in

to

increases, leading to pressure is tl;te

presser foot to come

the sewing speed increases.

In

<~n

extended

the feed power

If the partial shirring than the feed

result.

If condition, control lever Jowers,

feed

amount

The

feed power may decrease when sewing slippery materials, t--

or extremely lightProperly adjust

If

the

presser

not

aligned, smoothly, satisfactorily. in

close

contact

Burrs on

If

the walking

':i'i'li~p~'cn

'~'~'~"~'~"~'~"='~"="':=''::'::·

0d0

r . '

H If

the

walking foot foot remains lower cloth

L

_______

Cause

is

weakened been usc

is

close

cont<~ct

too

high, the

period is

weakened.

amount,

the top feed

the

reverse feed

decreases. [

low, the presser foot fails

with material as

poor

feed power. If

pre~scr

foot

in

poor

contact

of

liSe,

the feed teeth arc worn, and

stopper

indicator

an insufficient

din!

is

turned under

::tnd

the

fejt

U

or

he:~vy-weight

the

presser foot pressure

b<~r

guide

bracket

or

if

the

the presser adjusting spring

the

top

As

a result,

with material, leading

periphery

foot

pressure

in

r~nd

scratch material.

aS<.:cnding

in

contad

hils been fed. This mny result

_

and the presser

feed mechanism fails

the

presser foot fails to

scr<~tch

materials.

is

too low, the walking foot may

::::~c:::::=;:::::::::::::=:;;=::::::;:::::==:i

---

timing

with the material even when the

the

feed dog

the

sewing speed

the

walking foot

is

pushed up, causing

with material

is

set

at

a vuluc smaller

top

feed

amount

the

aforementioned

•

4i

/Stopper

•j

b will be below 2 mm

materials.

cannot to

. .

l11gh,

.:c:__

is

too late,

indicator

The

top

feed

(0.079")

and

sewing speed.

bar

base arc

to

move

function

come

poor

feed power.

the wa!kmg foot

___

the

walking

in

scratches.

as

will

amount

__j

I

Loosen adjust

H Increase

If pressure

Replace

Turn

L-i~n0d~i'''ct

Increase materials. speed.

Loosen

f-

bar base, using a screwdriver, and Then, {Precaution}

Be the

driving bar binds.

Remove

Increase the walking foot pressure.

Decrease

Correct

f-

the (Note) A little

Corrective measures

the

screw

the

walking

the

oc'"'ct_"_,S,_"c·

0

the

tighten

recheck.

careful

screw,

the timing

presser foot touches the

of

height

of

the

presser foot pressure.

foot

to

them

partial shirring stopper dial clockwise to set

pressure

balance it with

with new ones.

_______________

the

presser foot pressure for heavy-weight

For

light-weight materials, reduce

screw

of

it

again.

not

to

overtighten

or

else

the

burrs, using a

the

walking foot pressure.

so

inaccur::~cy

feed forked base, and properly

feed dog.

is

too

high, decrease the

the

presser

foot

pressure.

the

sewing

the

presser

~

~l

-~~~-,

......./.:::

.,

....

";;">____....-

buff,

file, etc.

that

it starts to go up

throat

in

timing

plate.

will

the

c:lUse

moment

no problem.

the

_J

Trouble

H

Hodwnt•l

walking foot

Check

motion

point

tm::Jrt

Check result

The

walking foot

is

too

late.

The

walking foot horizontal

is

too early.

I

horizont~-1

motion

timing r

timing

~

Cause

If

the

horizontal

feed m:itcria! even when the lower motcrial has been fed.

This may cause scratches.

If

the

timing

starts to go back even while

material forward. This may cause scratches.

is

timing

too

early,

is

too

the

btc,

walking

the

feed dog

the

walking

foot

prematurely

is

foot

tends

still feeding

to

M

I

Correct

Corrective measures

the

position

of

the

cam.

I

~

The lower cloth shirred while producing

shirring

[,r').

"11

is

~~~s-

•.

V •

also

Horizontal stroke

walking foot

H Presser foot pressure and

walking foot pressure

of

the

-

"""

~~

w

N

Abnormal sound

I

/'~

~··'

~;r~~'

zft

,

........

-y-

'·

h

30~1~

lt'

}"""'

::,

Run the sewing machine at low speed with the top feed

set at

"0" at reverse clatters or not.

Run the machine speed with the at at reverse feed lever clatters.

and bottom

"5",

and check if the

feed

"8",

and the bottom

"0",

and check if the

control

top

at

lever

low

feed

set feed

The horizontal stroke

is

too

long.

The presser foot pressure The walking foot pressure

If clatters for each rotation.

H

It clatters for each rotation.

H

of

the walking foot

is

too low.

is

too high.

~

If tho w•lking foot

teeth

are worn, the walking

too much.

This problem occurs when sewing light-weight materials

as

georgette. In an ordinary garment factory, there

such

I

no such problem and lower cloths. However, if the walking foot pressure is

extremely high, the lower cloth m:iy also be shirred.

If the feed dog or walking foot

r-

ponent, the reverse check them for any contact. horizontal motion, correct the position If the lever moves when the top feed if the feed dog

If the lever moves when the bottom feed

t-

check if the fol!owing components come

each other:

~

Top

food

Walking foot mount and presser foot (lower). Walking foot mount RoUer

~

P""""

;,

too low

foot

since the operator scpar:1tes the upper

feed

control lever clatters. So, fust

comes

in

contact with the throat plate.

dog

'nd

P"""

and presser bar base

and needle bar safety cover

ot

slips and feeds material

contacts

is

foot

)f

tho w•lking foot I

is

an

adjacent com-

set at

"0",

check

is

set at

"0",

in

contact with (0.197"). Reduce the

Slightly decrease the walking foot pressure it with the pressure foot pressure.

H

1-

If

the

contact occurs during vertical motion, correct

of

position

CD

f-

d)

G)

@ Remove the side cover, and correct the position

the forked base. If the contact occurs during

Some presser foot has riiax. feed amount not

in the standard position, remove

correct the position If a DLU-490 presser foot

tact with the walking foot mount. part No. B1524-491-xxx. If a DLU-490 presser foot tact with the part No. 81524-491-xxx.

feed rocker shaft crank (!ower).

wr.dking

to

balance

of

the feed bar

of

top

feed amount.

of

the

feed rocker shaft crank

is

used, it may come

is

used, it may come in con-

foot mount. So, use one with

S mm

If

the lever

the

side cover, and

So, use one with

the

J

cran\

is

in

con-

of

the

~

'

--

Check point

Check result

Cause

Corrective measures

Move

the walking foot up

and down to check

application

Check the walking foot for contact with an adjacent

component.

w w

I

of

pressure.

it for

The spring fails to work, and the walking

foot docs not move up and down smoothly.

The screw bar base has been overtightened, and

bar has deformed,

preventing smooth motion.

If the walking foot pressure slips on material, resulting especially when

Check if the partial shirring stopper indicator has been set at

of

a smatl value.

the presser

the

is

too low, the walking foot

in

a gauge has been changed.

poor shirring. This happens

Stopper

g:::

D

Top feed indicator

indic::~tor

Slightly loosen the presser bar not to loosen it too much, otherwise dislocated during operation.

partial shirring stopper dial and

Turn the

adjusting dial clockwise

value.

Use a gauge suited for the material and operation. (Use a separating plate if necessary.)

b::~se

screw.

to

set the indicator

the

Be

careful

part will

top

feed

at

a larger

be

Defective partial shirring

~

V I pbood

~

...

~~.

~~~

.

"'

__..-

Check if the wire roll at the rear

-'"-'"'"··-~

: 1 Po,ltion

stopper indicator.

·--

of

the machine has been

In

tho hook

oftho

put!•!

·····--

'hutl

g

0

H It

is

not

It

has been set

in

the walking foot lever collar.

at

a small value.

f-

Insufficient shirring resu!ta.

~"''"''"

~

Hook

.

"'

""

H Place the wire roll

Turn the partial shirring dial clockwise to provide a sufficient

top

feed amount.

in

the hook.

I

Trouble

I

Check

point

I

Check result

I

Cause

I

Corrective measures

Scratches caused during reverse feed stitching

When the

r-

if

the wire roller foot lever collar.

there

is

PF--6

i~

used, check

a play between

and

wa!kinJ;.

~(~t\0~/~·

. ·

..

·~

~

w

..,.

I

'

The

~

play

is

not

enough.

~

The feed lever lowers.

~

...

,.

o./\

$

~Jj~L

z·

\ )

~~

==-=1

insufficient play prevents reverse feed when

'l

"'''t'''

J,

\-

~

r

..

wrr.oloot

the

pby

reverse

Adjust

f-

the

provide a proper play.

so

Adjust

the

with

in

comes

stopper

under

the

table

to

~

~<wmtillttlliiW

0 I

~

that,

when

top

feed

and

contact

with the hook.

.

"10-

Stoppor

the

reverse feed lever

bottom

feed set

is

lowered

at

"'3",

the

roller

10.

HOW

TO

USE

GAUGES

A variety our gauge brochure.

(1) Type

of

gauges are available for the lDLU-5490N

of

gauge

The walking feet are roughly divided into the rake-in type, pull-in type and needle-side type.

®Rake-in

type Rake-in type includes

® Pull-in type

to

handle many different types of operations. When ordering, see

B,

E and

J.

This type

ducing

large

shirring

with type

Pull-in type includes D-type compensating foot. This type to pull material ahead

curves. This be

should be used not to set the top feed amount at a necessary, otherwise the walking foot teeth may scratch material.

type

used

BorE,

of

gauge

for

producing

and

gathering.

gathering

of

the needle.

feeds sewn

large

amount

parts

shirring

When

can

It

of as

the

is

ideally used for pro-

a

~eparating

be

further

is

ideally used for sewing sharp

material, therefore,

rake-in

plate

increased.

is

it

type. Also,

larger

value than

is

used

designed

cannot

care

(2)

Top feed amount of each type

The

maximum

o Types o Other types

feed

amount

Band E .........

of

gauges

* Use the top feed amounts shown above

necessary, the material cannot be held securely. This

of

gauge

of

each

8 mm (0.315")

....

5 mm (0.197")

type

Types

Sand

HA

belong to the needle-side type. This type

to

feed material on the sides

around the needle

when

it

is

sewn, effectively preventing puckering.

is

as

shown below:

as

the standard.

If

will

cause material to flap

is

of

the needle. The part

is

securely held and fed. This stretches material

the top feed amount

is

set

at a larger

or

cause scratches on material.

of

material

value than

designed

-35-

(3) Interchangeability of DLU·5490N and DLU-490 gauges

Except for some gauges, the gauge sets used for the DLU-490 can be used for the DLU-5490N. However, when

using the

a)

•

When

Example: 81524-491-BAO

DLU-490 gauges, pay attention to the following points when installing a presser foot:

A DLU-490 gauge has a mounting slot.

Walking foot mount

purchasing a new presser foot for the DLU-5490N, be sure that the 6th to 8th digits

So,

if

the presser foot

than necessary, point A

foot comes in contact with the roller,

preventing

the walking foot. After installing the gauge, move the walking foot up and down by a finger

to check necessary to set the presser foot low,

machine point A, using a grinder.

proper

it

for smooth motion.

is

positioned lower

of

the presser

driving

motion

of

its paart No. are "491 ".

* A gauge with part No. 491 can be used for the DLU-490.

b)

When

a presser foot with a finger guard

a)

paragraph Change the finger guard

1) Pull part A

above also applies.)

as

out,

using a nipper, and draw part 8

follows:

is

used for the DLU-5490N, the fibger guard must also be changed. (The

out

by prying the finger guard.

If

of

it

is

2)

Select the proper finger cover,

thoroughly wipe any oil off.)

3) The following three types cannot be used because part

walking foot mount. So, purchase

CD

B 1524490JOA

G)

BI524490JOG

CD

B 1524490FOD

one

with part No. including "491".

and

securely attach

it

using

Presser

foot

Part

No.

Finger guard part No.

81524490188

BI5244YOJBC B 1421491JOB B1524490JBM BI421491JOB

1524490ABO BI421491JOB

B

815244901BF 8

J524490G88 B J524490J B1524490JBL

All

presser feet

other than the

above

an

instantaneous adhesive. (Before attaching it,

8

of

the presser foot comes

BK

BI421491JOB

Bl421491JOB Bl421491GOB BI421491JOK BI421491JOK 81421491000

in

contact with the

-36-

60

39-

11.

PARTS LIST

(Bottom

and

variable

top

feed

components)

1Q9

Cam

1.

Walking

2.

Walking

3.

Walking

4.

Walking

7.

Walking

9.

Walking

10.

Walking

11.

Thrust

12

13.

14.

15.

16.

17.

18.

19.

20. 21

22

collar

Feed

rocker Stopper Dial Reverse feed Walking Walking Stopper

Reverse feed bushing Feed driving Feed reverse spring

foot

fulcrum

foot

fulcrum

foot

adjusting

foot

adjusting

foot

rock

foot

arm

foot

link

shaft

dial

control

foot

lever collar

foot

graduation

indicator

arm

C

A

B

shaft

crank

shaft A

shaft

link

lever

plate

~

23

I 22

4U

24

Adjusting

23 24 Feed spring

Driving

25

Driving

26

Driving roller

27

B

Driving presser

28

Feed rocker shaft

29

Feed rocker

30

Feed rocker shaft bushing

31

Feed

32

Feed rocker bar

33

Roller

34

Roller

35

36

Walking

37

Walking

38

Walking

39

Presser spring

40 41

Nut

Cap

42 43 Walking 44 Presser

~

~II?

link

spring

hook

arm

(front)

arm

{read

arm

crank

shaft

ro~ker

bar

bushing

shaft

foot

mount foot foot

adjusting

regulator

foot

spring

bar

guide

bracket

17

19

-'

~~~::-

~~

5716

.)~''

18

~

~[J

•

~-

•

'~,

-

tp

'"'

~

14

~

54

45 Bracket plate 46

Presser

bar

thread

guide

base 8.

adjusting arm

link

spring

stopper

bar

stopper screw

(lower)

knob

47 Bushing 48

Driving

bar

49 Pin 5. 50 Roller 6.

Roller

51 52 Presser 53 Presser 54 Walking 55 56 57 58

59 60 61 62

63 64

65

shaft

bar foot

Adjusting

Washer

Thrust

Adjusting link stopper plate Screw

Adjusting link stopper screw Adjusting link stopper nut

Presser

foot

Rubber

ring

collar

Presser

bar

Screw of presser

of

adjusting link stopper plate

bar

-37-

12. DLU-5490N TABLE DIMENSIONS Part No. 11155405

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DLU-5490N-7 TABLE DIMENSIONS

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diDgntm

Juki DLU-5490N, DLU-5490N-7 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual