Mitsubishi LU2-4410, LU2-4430 Instruction Manual

INDUSTRIAL

LU2-4410-4430

A

MITSUBISHI

SEWING

MACHINE

MoHaI

Classes

Thank

Please

you

for

read.this

Single-Needle,

Automatic

choosing

instruction

Mitsubishi Industrial

carefully

Variable

before

INSTRUCTION

Double-Needle

Lockstitch

Compound-Feed

undertrimmer

speed

Sewing

operating

control

Machine.

the

machine.

MANUAL

PRECAUTIONS

[T]

Safety Precautions

1.

When

turning

around/under

2.

Power

his/her

3. The

power

the

"V" belt,

4. Avoid placing fingers, hairs,

or

motor

the

the

needle

mustbeturned

seat.

mustbeturned

adjusting

when

the

machineisoperation.

power

and

off

the

BEFORE

on,

keep

your

the

area

around

when

the

machineisnot

off before tilting

machine, or

bars

etc.,

STARTING

hands

and

the

the

when

replacing.

near

the pulley, "V" belt, bobbin

Injury

could

fingers

pulley.

used,orwhen

machine head, installing or removing

result.

OPERATION

away

from

the

operator

winder

the

area

leaves

pulley,

5. Do not insert fingers into the thread take-up cover, under/round the needle, or pulley

when

the

machine

is in

operation.

6. Ifa belt cover, finger guard, and/or eye guard are installed, do not operate the machine

without

these

safety

devices.

[2]

Precaution before Starting Operation

1. if

the

the

2. If

lubricating.

3.

Whenanew

pulley

(The pulley

4. Verify

nameplate.

machine's oil pan

machineislubricated

sewing

with

the

should

the

voltage

power

has

machine

on.

rotate

counterclockwise

and

(singleorthree)

an oil

sump,

by a

is first

drop

turned

never

oiler,

when

phase

operate

never

on,

viewed

verify

with

the

machine before filling it.

operate

the

machine

the

rotational direction of

from

the

pulley.)

those

given on

the

before

the

motor

[U Precaution for Operating Conditions

1. Avoid using

temperature(5°C or lower). Otherwise, machine failure may result.

2. Avoid

3. Avoid using the

high-frequency

using

the

machine at

the

machineindusty

machineinareas

welder

and

abnormally

conditions.

others.Isgenerated.

high temperature(35°C or higher) or low

where

too

much

electrical noise,

resulted

from

the

-

CONTENTS

-

PREPARATION

m

Power

I 2 I

Connectionofcontrol

r3~l

Adjustment of needle bar stop position 2

CAUTIONS

m Oiling(l) 3

I 2 I

Oiling(2)

I 3 I

Oiling

FOR

OPERATION

cable

ON

connection

USE

box 2

condition 4

I 4 I Adjustment of oiling to rotating hook 4

I 5 I Cautions on operation 4

OPERATION

m Installation of needles 5

m Winding of bobbin thread 5

I 3 I Selection of

thread

I 4 I Threading of needle threads 6

m Adjustment of feed
ri"!

Setting of bobbin 7

(stitch)

length and stitch reversing (touch-back) 7

I 7 I Threading of bobbin threads 8
r"8~l

Tension adjustment of bobbin threads 8

r"9~l Balance of thread tension 8

I101 Needle thread tension 8

rm

112I

nn

Adjustment

Timing

Adjustment

of presser foot pressure 8

between

rotating

hook

motion

and

needle

motion

of feed dog height 10

1141 Relationship between rotating hook motion and take-up lever motion 11

115 I Relationship between hook motion and opener motion 11

I161

Relationship

between needle motion and feed dog motion 12
117I Safety clutch device 13
1181 Upper feed adjustment (needle side) 14

I19 I Outside presser foot and inside presser vertical stroke adjustment 14
riol

Adjustment of forward/backward stitch length 15

rm

Installation of movable knife 15

Adjustment

Adjustmentofneedle

I

241

Adjustment

I25I

Sharpeningoffixed

I

261

Adjustment

of thread

trimmer

threads

cam 16

tension

of scissoring pressure of

knife

for change of

needletoneedle

release

assembly

movable

knife

and

fixed

knife

distance 19

17

18

18

1

3

6

9

ADJUSTMENT

I 1 I "1—2 POSITION" select switch operation

i 2 I Pedal operation

AND

OPERATION

OF

CONTROL

UNIT

20

20

I 3 I Adjusting the pedaling forces 20

I 4 I Adjusting the stitching speed 21
I 5 I Optional functions 22

Specifications 24

PREPARATION

Overall

viewofassembled

sewing

machine

FOR

m Power cable connection

1.

ConnectiontoPower

When

connecting

pluggedinthe

(1) In

caseofthree-phase

the

"V"

phasetothe

depends,

Paragraph [T|-3.

CAUTION:

(2)

The

appropriate

Lamp

Leads

(1)

When

installing

15 to

20w),

on

the

backofthe

removed
insulating

properly.

then.

Insulatedbywrapping

tapeonthe

CAUTION:

(2)

When

the

showninthe

control

box

CAUTION:

Rotary

Direction

It is

possibletochange

left

sideofthe

The

built-in

as

facing to

counterclockwise

Supply

the

power

proper

receptacle

electrical

white

however,

the

and

tube

The

wires.

illuminating

upon

The

green

motor

properly.

power

fuse

the

illuminating

connecting

control

connectedbyremoving

from

the

wire

connections

The

power

turned

off

ing

the

lamp.

lampisnot

figureonright

willbepossibly

The

illuminating

warmer

and

may

cause

the

front

coveronthe

lampinthe

the

motor

pulley,

as facing to

OPERATION

Touch

back

switch

supply

connectortothe

after

confirming

power

lead,

the

wire

capacityisas

wireIsattached

box.Itshould

wire

and

switch

before

side.

burned

others,inparallel.

transformer

rotary

control

internal

andonwhen

the

system,

and

the

settingofthe

mustbeconnectedtothe

lamp

(GV,

be

the

stripping

should

be,

insulating

must

be

connect

used,

the

If a

short

out.

lamp

must

winding

directionofthe

box,

switchisoff

motor

pulley,

control

the

connector

the

"W"

"U"

phasetothe

internal

follows.

Lamp

Power

leads

endofthe

circuit

occurs

notbeconnected

Otherwise,

burned

motorbyremoving

and

push

the

when

rotating

clockwise. The

matching

Operation box (option}

Balance

(included

V

Power

X-type

Receptacles

machine

Control

box,

the

connector

type

and

matching

phase

shouldbeconnectedtothe

black

switchinthe

ground

lamp

lead.

control

terminalinordertoground

supply

200V

100V

Bare

wire

Insulating
tape<2to

3

turns

wrapped)

Lamp

leads

must

failing to

the

with

load

insulate,

any

capacity

out.

the

internal

direction

the

motorisrotating

rotary

with

the

machine

wheel

synchronizer)

type

belt

push

button

servo

motor

for

cables

box

shouldbecompletely

direction.

red

The

motor

rotary

direction

boxasdescribed

the

240V:

10A

120V:15A

@

Insulating

tape

(2to3

turns

wrapped)

Cut

bare

wire

Approx.10mm

or

leads

more

be insulated as 0 or (D as

the

transformerinthe

heater,

suchasa

foot

willbeexceeded.

rubber

cap

from

the

selector

bottom

switch.

counterclockwise

direction

prior to

has

been

shipping.

lead,

set

in

It

to

- 1 -

PREPARATION

FOR

OPERATION

Connection

The

control

Note:

Machine

LU2-4410-BIT

LU2-4430-B1T

•*

means

12:110V~120V
24:

220V~240V

of

box

shouldbeconnectedasshowntothe

(1) Be

suretoturn

off

for

or

disconnecting

(2)

The

combinationofthe

heads

panels

special

combination

machine

panel.

head

model

using voltage

control

tne

safety

before

with

the

are

specified

care

for

when

headormotor

Control

XC-AM--20

box

the

Adjustmentofneedle bar

1. Adjust of "UP" position
When

the

pedal

machine

deviate larger

.—1.

Disconnect

the

—2. Run

—3. While holding

ting tool" in

tool.

2. Adjust of "Down" position

When

the

stopsat"Down"

large

than

Disconnect

—1.

the

—2. Run

position.

—3.

While

ting tool" in the hole0,then remove the

tool.

3. Confirm the stop oepration,

pins)

coming

receptable.

is kicked

stopsat"UP"

than

3 mm, adjustasfollows.

the

machine

the

pedalis"Neutral"

5 mm,

machine

the

plug (12 pins) of

head.

machine

the

the

position.Ifthe

adjustasfollows.

the

plug (12 pins) of

head.

machine

holding

the

from

the

and

pully, insert

hole®,

position. If

stopat"UP"

and

pully,

machine

power

switch

connecting

connectors.

machine

motor

control

below.

box

Use

correct

the

control

model

position

by heel,

the

the

replacing

stop

down

cable

position.

the

"adjus

then remove the

the

machine

marks

cable

stopat"Down"

insert

the

then

set

the

plug(12

head

into

the

marks

from

deviate

from

"adjus

the

Operation

box

right.

Timming mark Arm

Round

in

table

hole

white

Black

mark

mark

"Up"

"Down"

Pully

position

position

Adjusting

tool

AFTER

-2

-

CAUTIONS

\T\

oiling

Fill

the

Oil level

level is

"H"

level.

For oil, use

Oil

level

ON

USE

(1)

oil

reservoir

shouldbeperiodically

found

MC70M

with

oilupto

below

"L"

level

specified by Mitsubishi.

"H"

checked.

replenish

mark.

If oil

oil

to

[2]

Oiling

Whenanew

time,

considerably
suitable

by

(2)

sewing

or sewing

long

amountofoiltothe

arrowinthe

machineisused

machine

timeisused

below

figure.

left

again,

portions

out

for

the

of use for

replenish

indicated

first

a

-3

-

CAUTIONS

ON

USE

I^Oiling

condition

Seedrippingof oil through the oil sight hole

to check oiling condition during operation.

Oil sight window

j

Cautionsonoperation

11)

When

the

foot

(2)Itshouldbenoted

work

power

operation.

(3)

Since

malfunctionorcontrol

keep

operation.

(4) Do

poweristurnedonor

away

from

the

pedal.

that

when

the

failure

occurs

dustinthe

the

control

not

applyamultimetertothe

the

powerisinterrupted

during sewing

control

troubles,besure

box

cover close

circuit for checking, otherwise voltage of

multimeter

componentsinthe

might

damage

circuit.

off,

brake

may

machine

box

might

semiconductor

keep

not

or

cause

during

control

0

Adjustmentofoilingtorotating

to

hook

Decrease

"°"i ' ' *

djusting

screw

Nut

-4

-

OPERATION

[T]

Installationofneedles

Note:

Before

installing

the

needles,besuretoturn

off

the

power.

Double

Insert

of needle clamp and tighten

screw keeping

needle

Needle

the

needle

the

facetoface.

I

Windingofbobbin

Adjustment:

•

Tensionofwound

• Conically

• Length

of

wound

wound

upto

the

bottom

long grove side of

Long

groove

side

thread

thread

thread

thread

the

Note:

Slack

Move
Loosen the

and

tighten

nsufficient

insertion

When

windingisrecommended

the

thread

thread

the

Needle

distorted

bobbin

threadiswound,

guide

toward

length adjusting screw to increase length of

screwtodecrease

for

smaller

lengthofthread.

keep

the

polyester

thread

diameterofwound

presser

and

Single-

Long

left

foot

nylon

thread

Needle

groove

side

thread.

lifted.

layer.

thread

i

/A

Winding

adjusting

I

tension

screw

Thread

guide

Even

winding

with

amount

80%offull

capacity

of

OPERATION

[y|

Selection of thread

Itisrecommended

the

left

twist

When

possible,

needles.

wellas"Z"

[41

(1)Pass

needle

threadinthe

discriminate

use

For

Threadingofneedle

each needle

guide

(§).

Note:

When

threadorfilament

used,

pass

(§) as well.

(2)

With

the

most

position,

the

order

Note:

Pressing

button

showninthe

saucerofthe
and

the

Needle

to

use

(viewed

from

right

needle.

useofneedle

"Z"

twist

bobbin

thread

thread,

canbeused.

twist

threads

thread

thin

slippery

the

take-up

showninthe

upper

thread

thread,

thread

through

lever

pass

each

the

upper

figure

upper

thread

thread

can

tension releasing button

"S"

twist

front),

threadsisim

thread

in

"S"

twist

through

thread

for

example)

thread

locatedatthe

needle

following

thread

below

tension

easily

figure.

pulled

thread

and

"Z"

both

the

thread

thread

(polyester

guide

upper

thread

loosening

opens

the

adjuster,

out.

in

"S"

twist

thread

as

"Z"

® ®

twist

thread

®(D

®

V

is

in

L

Iliik

I3D

LU2-4410

bil

(Detail)

Lead

the

thread

leftward,

Lead

the

thread

rightward.

(See detailed figure.)

Needle

thread

-6-

LU2-4430

<k