Mitsubishi Electric LX2-630-M1 User manual

A180E098P03

SINGLE-NEEDLE LOCKSTITCH BASTING

AUTOMATIC UNDERTRIMMER

INDUSTRIAL SEWING MACHINE

INSTRUCTION MANUAL

LX2-630-M1

MODEL

PRECAUTION BEFORE STARTING OPERATION

1 Safety Precautions

1. Whenturningthepoweron,keepyourhandsandngersawayfromtheareaaround/

undertheneedleandtheareaaroundthepulley.

2 . Thepowermustbeturnedo󰮏whenthemachineisnotused,orwhentheoperator

leaveshis/herseat.

3 . Thepowermustbeturnedo󰮏beforetiltingthemachinehead,installingorremoving

the“V”belt,adjustingthemachine,orreplacingparts.

4 . Avoidplacingngers,hairs,obstacles,etc.nearthepulley,“V”belt,bobbinwinder

wheel,ormotorwhenthemachineisinoperation.Injurycouldresult.

5 . Don’tputngersintothethreadtake-uplevercover,around/undertheneedle,or

pulleywhenthemachineisinoperation.

6 . Ifthebeltcover,thengerguard,and/ortheeyeguardareinstalled,don’toperate

themachinewithoutthesesafetydevices.

2 Precaution before Starting Operation

1. Ifthemachine’soilpanhasanoilsump,neveroperatethemachinewithoutllingoil

init.

2 . Ifthemachineislubricatedbyadropoiler,neveroperatethemachinewithout

lubricating.

3. Whenanewsewingmachineisoperated,verifytherotationaldirectionofthepulley

withthepoweron.

 (Thepulleyshouldrotatecounterclockwisewhenviewedfromthepulley.)

4 . Verifyvoltageand(singleorthree)phaseindicatedonthenameplateofthemotor.

3 Precaution for Operating Conditions

1. Avoidusingthemachineatabnormallyhightemperature(35℃orhigher)orlow

temperature(5℃orlower).Otherwise,machinefailuremayresult.

2 . Avoidusingthemachineindustyconditions.

3 . Avoidusingthemachineinconditionslledwithalotofelectricnoisessuchashigh-

frequencywelders.

INTRODUCTION

　ThankyouverymuchforpurchasingMitsubishiindustrialsewingmachine.

　Pleasereadthisinstructionmanualbeforeoperatingthesewingmachine.Pleasereadalso

“SafetyManual”,“InstructionmanualforMitsubishiLimiservoX”andoperatethesewing

machinecorrectlyandsafely.

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

CONTENTS

PREPARATION FOR OPERATION ……………………………………………… 1

1Adjustmentoftheneedlestoppingposition……………………………………… 1

USAGE PRECAUTION ……………………………………………… 2

1Lubrication(1)………………………………………………………………………… 2

2Lubrication(2)………………………………………………………………………… 2

3Adjustmentoflubricationtotherotatinghook ………………………………… 2

4Cleaningofmotor …………………………………………………………………… 3

5Installationofthebeltcover ……………………………………………………… 3

6Precautiononoperation …………………………………………………………… 3

HOW TO USE ……………………………………………… 4

1Installationoftheneedle …………………………………………………………… 4

2Windingofthebobbinthread……………………………………………………… 4

3Threadingoftheneedlethread…………………………………………………… 4

4Settingofthebobbin………………………………………………………………… 5

5Leadingoutthebobbinthread …………………………………………………… 5

6Adjustmentofthebobbinthreadtension………………………………………… 5

7Balanceofthreadstension ………………………………………………………… 5

8Adjustmentoftheneedlethreadtension………………………………………… 6

9Adjustmentofthethreadtensionreleasing……………………………………… 6

<Adjustmentofthepresserfootpressure………………………………………… 7

AAdjustmentofworkingheightofthepresserfoot……………………………… 7

BTimingbetweentherotatinghookmotionandtheneedlemotion…………… 8

C

Relationshipbetweentherotatinghookmotionandthethreadtake-uplevermotion

… 9

DRelationshipbetweentherotatinghookmotionandtheopenermotion …… 9

EInstallationofthemovableknife…………………………………………………… 10

FAdjustmentofthethreadtrimmercam ………………………………………… 11

G

Adjustmentofmeshingpressurebetweenthemovableknifeandthexedknife

… 12

HSharpeningofthexedknife ……………………………………………………… 12

SPECIFICATIONS ……………………………………………… 13

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

1 Adjustment of the needle

stopping position

Theneedlestoppingpositionshouldbeadjusted

withthedetectorinstalledonthemachinehead,

butthesewingmachineconnectordisconnected

fromthecontrolboxandthecoverofthedetector

removed,asfollows.

1 . Adjustment of “UP” position

Turnthepulleyandstopitattheposition

wheretheneedlecomestothehighest.(Atthis

time,thewhitemarkpointonthepulleymeets

theblackmarkpointonthearm.)

Loosenthetwosetscrewsonthedetectorjoint.

Turnthedetectorjointwhilexingthepulley,

andadjusttheUPpositiondetectordisc(black)

totheprescribedstopposition.

Tightenthetwosetscrewsonthedetectorjoint.

2 . Adjustment of “DOWN” position

Turnthepulleyandstopitatthepositionwheretheneedlecomestothelowest.Atthistime,check

thattheDOWNpositiondetectordisc(red)locatedintheprescribedstopposition.

Ifnot,turnonlytheDOWNpositiondetectordisc(red),andadjustthestopposition.

Afteradjusting,reinstallthecoverofthedetector,andconnectthesewingmachineconnectorasbefore.

PREPARATION FOR OPERATION

— 1 —

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

2 Lubrication (2)

Whenanewsewingmachineisusedforthe

rsttime,orsewingmachineleftoutofusefor

considerablylongtimeisusedagain,replenisha

suitableamountofoiltotheportionsindicatedby

arrowsinthegure.

●Oilingamount

◎→ 3,4drops

○→ 1,2drops

3 Adjustment of lubrication to the

rotating hook

1 Lubrication (1)

Filltheoilreservoirwithoilupto“H”mark.

Oillevelshouldbeperiodicallychecked.Ifoillevel

isfoundbelow“L”levelreplenishoilto“H”level.

Foroil,use“MC70M”speciedbyMitsubishi.

※Refer

 MC70M：Specicgravity(15℃ )=0.86(g/cm3)

  ：Viscosity(40℃ )=10.9(mm2/s)

USAGE PRECAUTION

— 2 —

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

4 Cleaning of motor

Removedustfromthemotorltereveryoneortwomonths.(Continuedoperationwiththelter

cloggedwithlintordustmayoverheatthemotor.)

5 Installation of the belt cover

1 . Installthebeltcoveronthemachinesideforsafety.Refertotheprovidedinstructiondocument

containedinthesamepackage.

2 . Installthebeltcoveronthemotorsideforsafety.

6 Precaution on operation

( 1 ) Whenthepoweristurnedonoro󰮏,keepfootawayfromthepedal.

( 2 ) Itshouldbenotedthatthebrakemaynotworkwhenthepowerisinterruptedorpowerfailure

occursduringsewingmachineoperation.

( 3 ) Sincedustinthecontrolboxmightcausemalfunctionorcontroltroubles,besuretokeepthe

controlboxcovercloseduringoperation.

( 4 ) Donotapplyamultimetertothecontrolcircuitforchecking,otherwisevoltageofmultimeter

mightdamagesemiconductorcomponentsinthecircuit.

USAGE PRECAUTION

— 3 —

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

2 Winding of the bobbin thread

3 Threading of the needle thread

Passtheneedlethreadintheordershowninthe

rightgure.

1 Installation of the needle

Note: Before installing the needles, be sure to turn o󰮏 the power.

1 . Forneedle,use“Mt × 190”.

2  Determinethicknessoftheneedleaccordingtothicknessofthethreadused.

HOW TO USE

— 4 —

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

4 Setting of the bobbin

( 1 ) Putthebobbinintothebobbincaseinthe

directionthatthebobbininthebobbincase

turnsclockwise,viewedfromthefront,when

thethreadispulled.

( 2 ) Passthethreadthroughslit①ofbobbincase

andpull.

 Thethreadwillbeledoutfromtheguideeye

②.

Note:Thebobbinshouldturninthedirection

shownbyarrowinthegurewhenthe

threadispulled.

5 Leading out the bobbin thread

( 1 ) Putthebobbinandbobbincasetogetherinto

thehook,asshownintherightgure.

( 2 ) Pickuptheendofneedlethreadbylefthand,

andturnthepulleyonerotationbyright

hand.Whentheneedlethreadispulledup,the

bobbinthreadwillbedrawnoutasshownin

therightgure.

6 Adjustment of the bobbin

thread tension

7 Balance of threads tension

A 

B 

C 

Balancedtension

Tighttheneedlethreadtensionor

loosethebobbinthreadtension

Loosetheneedlethreadtensionor

tightthebobbinthreadtension

HOW TO USE

— 5 —

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

Adjustment of the needle thread tension

Theneedlethreadtensioncanbeadjustedby

changingpressureofthetensiondisk,andforce

andstrokeofthethreadtake-upspring.

●Adjustment of the tension disk pressure

1 . Inmostcases,threadtensioncanbeproperly

adjustedonlybychangingtightnessofthe

threadtensionnutⒶ.

2 . Toincreasepressure,turnthenutclockwise.

3 . Todecreasepressure,turnthenut

counterclockwise.

●Adjustment of the thread take-up spring force

Applyascrewdrivertothethreadtake-upspring

studandturnthestud.

Thespringforceincreaseswhenthescrewdriver

isturnedcounterclockwise,anddecreaseswhen

turnedclockwise.

Ifthestudistight,removethefaceplateand

loosenthescrewoftensionregulatorslightly.

●Adjustment of the thread take-up spring stroke

1 . Loosenthesetscrewusedtosecurethe

threadtensionregulatorslightly.

2 . Applyascrewdrivertothethreadtake-

upspringstudandturnthescrewdriver

counterclockwisetoincreasethestroke.

3 .

Turnthescrewdriverclockwisetodecreasethestroke.

4 .

Afteradjusting,besuretotightenthesetscrew.

 Thestandardstrokeofthreadtake-upspring

isfrom6to8mm.

Adjustment of the thread tension releasing

1 .

Adjustment of the thread tension regulator setting position.

 Thestandardgapisabout0.5mmwhenthe

tensionreleasecamsalienceisincontactwith

thetensionreleasepin.

 Toadjust,loosenscrewⒶandchangeposition

ofthethreadtensionregulatorproperly.

2 . Adjustment of the tension release timing

Note: Thetensionreleasetiminglargelya󰮏ects

stitchingoperation.Ifthegap betweenthe

tensiondisksis toosmall, theneedlethreadis

notdrawnproperly.Onthe contraryifthegap

istoolarge,the needlethreadmaybereleased

earlierandbecomeloose.

Thetensionreleasecamshouldbesetsothatthe

tensionreleasediskscometoopenatthetime

whentheredmarkpointonthepulleycomesin

linewiththeblackmarkpointonthearm.

Ex.:

ThreadusedCotton#40(doubletwist)

 FabricGeneralapparelandpad

 Needlethreadtension40-60g

 Bobbinthreadtension5-10g

 Threadtake-upspringforce15-20g

 Threadtake-upspringstroke6-8mm

HOW TO USE

— 6 —

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

< Adjustment of the presser foot

pressure

1  Thepressureadjustingscrewisfactory-

adjustedasshownintherightgure.

2 . Loosenthepressureadjustingscrewlocknut

andturnthepressureadjustingscrewⒶ.

3 . Turnthescrewclockwisetoincreasethe

pressure.

4 . Turnthescrewcounterclockwisetodecrease

thepressure.

Note:DonotchangesettingofscrewⒷ.

Ifthescrewis toolooseortoo tight,clapping

noisemayoccurduringoperation.

A Adjustment of working height

of the presser foot

1 . Height of the presser foot

Thestandardheightofthepresserfootatits

lowestpositionis1.0mmmeasuredbetweenthe

presserfootbottomsurfaceandthethroatplate

topsurface(seethedetailofpart“A”).

Toadjusttheheightofthepresserfoot,loosen

thesetscrewⒹusedtosecurethepresserbar

guidebracketandverticallymovethepresser

bar.

2 . Working height of the presser foot

LoosenscrewⒸandadjustpositionofpresser

barliftingbracketsothatthepresserfootstarts

goingupwhentheneedlepointreaches1.0to

1.5mmabovethepresserfootbottomsurface.

(Whenthisadjustmentismade,theheightof

thepresserfootatstopofthemachineisabout

15.5mmoverthethroatplate.)

HOW TO USE

— 7 —

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

B Timing between the rotating

hook motion and the needle

motion

Note:Ifyouremovethepresserfootandthe

throatplate,itmakeseasiertoadjust.

( 1 ) LoosenallscrewsⒶ,Ⓑ,Ⓒ,Ⓓ.

Note:Atthistime,don’tloosenthesetscrew

Ⓒtoomuch.

( 2 ) Checkthattherstscrewofthelargegear

entersanotch,andsettheneedlebaratthe

lowestposition.

( 3 ) Slidethelargegeartothehooksaddleand

meshwiththesmallgear.Atthistime,adjust

itsothatoneofthreesetscrewsⒹfaces

upward.

( 4 ) Lifttheneedlebar2.2mmfromthelowest

position.Refertotimingmarksshowninthe

gure.

( 5 ) Adjustthesaddlehookpositionsothatthe

gapbetweenthetipofthehookandthescarf

oftheneedleis0.05mmorlower.

( 6 ) TightenscrewsⒶ,Ⓑ.

Note:BecarefulnottoovertightenscrewⒷ.

( 7 ) Haveasmallgapbetweenthelargegearand

( 8 ) Lifttheneedlebar2.2mmfromthelowest

positionagain,andadjustthetipofthehook

positionsothatitisinthecenterofthe

needle.

( 9 ) Whilecheckingthatthetipofthehookis

inthecenteroftheneedle,andtightenset

screwsⒹ.

Note:TighteneachscrewⒹlittlebylittle.

(10) Returnthemachineheadtotheoriginal

positionandadjusttheneedleguideposition

sothatitcomeslightlyincontactwiththe

needle.

Large gear

HOW TO USE

— 8 —

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

Relationship between the rotating

hook motion and the thread take-up

lever motion

Whenthetimingbeltisremovedforreplacement,

etc.,therelationbetweentherotatinghookmotion

andthethreadtake-uplevermotionshouldbe

adjustedasfollows:

( 1 ) Turnthepulleyandstopwhenthethread

take-upleverisliftedtothehighestposition.

( 2 ) Leanthemachineheadbackwardandcheck

thatthearrow(timingmark)putonthe

timingbeltisalignedwiththeblacklineon

thebossoflowershaftbearing.

( 3 ) Ifthetimingmarkisnotinlinewiththe

blackline,removethetimingbeltandinstall

itagaintoadjust.

Relationship between the rotating

hook motion and the opener motion

( 1 ) Turnthepulleybyyourhandandstopit

atthepositionwheretheopenerholderis

locatedmostremotelyfromthethroatplate.

( 2 ) CheckthatthegapbetweenthelugⒶand

theopenerisapproximately0.2mm.

( 3 ) Ifthegapistoolargeorsmall,loosenthe

openerholderscrewⒷandadjustpositionof

theopener.

HOW TO USE

— 9 —

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

2 .

Gap between the movable knife and the lug of

inner hook

( 1 ) Turnthepulleyandstopitattheposition

wheretheneedlecomestothelowest.

( 2 ) Whilepushingthecamfollowercrank,turn

thepulleyandstopitatthepositionwhere

themovableknifemovetothepositionas

showninthegure.

( 3 ) Turntheinnerhookandadjustsothatthe

gapbetweenthemovableknifeandthe

lugofinnerhookisabout0.2mm(screws

ⒶandⒷshouldbeloosenedforthis

adjustment).

E Installation of the movable knife

1 . Initial position of the movable knife

( 1 ) Turnthepulleyandstopitatthepositionwherethe

needlecomestothelowest.

( 2 ) Putthecamrollerintothethreadtrimmercamgroove

bypushingthecamfollowercrank.

( 3 ) Inthiscondition,turnthepulleyandstopitatthe

positionwheretheblackmarkpointonthearmmeets

thewhitemarkpointonthepulley.

 Setthecamfollowercrankatthispositionwitha

screwdrivertemporarilypreventingthecamroller

comingoutfromthecamgroove.

( 4 ) LoosenboltⒶ.

( 5 ) Adjustsothatthetipofthemovableknifeprotrudes

3to3.5mmfromthexedknife,asshowninthegure

andtightenboltⒶ.

HOW TO USE

— 10 —

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

F Adjustment of the thread trimmer cam

( 1 ) Turnthepulleyandstopitatthepositionwheretheneedlecomestothelowest.

( 2 ) Putthecamrollerintothethreadtrimmercamgroovebypushingthecamfollowercrank.

( 3 ) Turningthepulley,adjustthethreadtrimmercamsothatthemovableknifestartsmovingwhen

thegreenmarkpointonthepulleycomesinlinewiththeblackmarkpointonthearm.

 Toadjust,loosentwothreadtrimmercamclampscrewsⒶ.

HOW TO USE

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From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

G Adjustment of meshing pressure between the movable knife and the

xed knife

( 1 ) LoosenthexedknifebracketclampboltⒶ.

( 2 ) AdjustmeshingpressurebyturningtheupanddownadjustingscrewⒷ,andtightentheboltⒶ.

Note:Sinceoverpressurecausesalargetorqueonthethreadtrimmermechanismandtrimming

failure,adjustsothatthethreadcanbetrimmedwiththeminimumpressure.

( 3 ) Movethemovableknifeandcheckthatthethreadcanbesharplytrimmed.

H Sharpening of the xed knife

Ifthexedknifeisdull,itshouldbesharpenedasshowninthegure.

Sinceitisverydi󰮐culttosharpenthemovableknife,replaceitwithanewonewhenitdulls.

HOW TO USE

— 12 —

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

LX2-630-M1 Specications

Model

Specications LX2-630-M1

Application Bastingforgeneralapparel

Max.sewingspeed(rpm) 800

Needlebarstroke(mm) 39

Threadtake-upleverstroke(mm) 55.5

Presserfootstroke(mm) 21.0

Presserfootheight(mm)

(Topdeadpointofthreadtake-uplever) 15.5

Needle Mt×190#14(#11to#16)

Hook horizontalrotatinghook

Bobbin Madeofaluminumforthreadtrimmer

Lubricationsystem Automaticlubrication

Beddimensions(mm) 517×178

Note:●Don’toperatethemachineoverthemax.sewingspeed.

 ●Thebobbinshouldbeofhighqualityfreefromdeformation.

 ●Somematerials,and/orsewingconditionsmayrequirespecicationsotherthanthoselisted

above.

 ●Thesespecicationsaresubjecttochangeformachineimprovement.

SPECIFICATIONS

Printed in Japan

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com

Mitsubishi Electric LX2-630-M1 User manual

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