Mitsubishi Electric LU2-4710-B1T Bedienungsanleitung

A180E363P05

INSTRUCTION MANUAL

LOCKSTITCH COMPOUND-FEED AUTOMATIC UNDERTRIMMER

INDUSTRIAL SEWING MACHINES

LU2-4710-B1T (Single-Needle)

LU2-4730-B1T (Double-Needle)

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.

CONTENTS

PREPARATION FOR OPERATION ……………………………………………… 1

1Connectingtheelectriccablestothecontrolbox ……………………………… 1

2Settinguptheactivatingspeedoftheaircylinder……………………………… 2

3Adjustmentoftheneedlestoppingposition……………………………………… 2

USAGE PRECAUTION ……………………………………………… 3

1Lubrication(1)………………………………………………………………………… 3

2Lubrication(2)………………………………………………………………………… 3

3Lubricationcondition………………………………………………………………… 4

4Adjustmentoflubricationtotherotatinghook ………………………………… 4

5Precautionforthebuilt-intypedetector ………………………………………… 4

6Installationofthebeltcover ……………………………………………………… 4

7Precautiononoperation …………………………………………………………… 4

HOW TO USE ……………………………………………… 5

1Installationofneedles ……………………………………………………………… 5

2Windingofthebobbinthread……………………………………………………… 5

3Selectionofthethread……………………………………………………………… 6

4Threadingofneedlethreads ……………………………………………………… 6

5Adjustmentoffeed(stitch)lengthandbackstitch……………………………… 7

6Settingofbobbins …………………………………………………………………… 7

7Adjustmentoftheneedlethreadguide ………………………………………… 7

8Threadingofbobbinthreads ……………………………………………………… 8

9Adjustmentofbobbinthreadstension…………………………………………… 8

:Balanceofthreadstension ………………………………………………………… 8

AAdjustmentofneedlethreadstension …………………………………………… 8

BAdjustmentofthepresserfootpressure………………………………………… 8

CAdjustmentofthethreadtakeupspring………………………………………… 9

DAdjustmentoftheoutsidepresserfootandinsidepresserfoot……………… 9

EInstantalternatingswitch ………………………………………………………… 11

FThestopperscrewforadjustingthemaximumalternatingstroke ………… 11

GInstallingthefeedregulatorbracket……………………………………………… 12

HAdjustmentofthealternatingstrokesensingpotentiometer ………………… 12

ITimingbetweentherotatinghookmotionandtheneedlemotion…………… 13

JAdjustmentofthefeeddogheight ……………………………………………… 14

K

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

… 15

LRelationshipbetweentherotatinghookmotionandtheopenermotion …… 15

MRelationshipbetweentheneedlemotionandthefeeddogmotion…………… 16

NSafetyclutch ………………………………………………………………………… 17

OAdjustmentofupperfeedlength(needleside) ………………………………… 18

PAdjustmentofforward/backwardfeedlength ………………………………… 18

QInstallationofthemovableknife…………………………………………………… 19

RInstallationpositionofthethreadtrimmercam………………………………… 20

SAdjustmentofthethreadtrimmercam ………………………………………… 20

TAdjustmentofthethreadtensionreleasing……………………………………… 21

U

Adjustmentofmeshingpressurebetweenthemovableknifeandthexedknife

… 22

VSharpeningofthexedknife ……………………………………………………… 22

W

Adjustmentofthethreadtrimmerwithchangingthewidthbetweenneedles

… 23

SPECIFICATIONS ……………………………………………… 24

1 Connecting the electric cables to the control box

Connectwiresandpipesasfollows.

( 1 ) Connectthecables①extendedfromthesewingmachineheadtothecontrolbox,andthenconnect

3-pinconnector②tothesolenoidvalve③usedforactivatingtheaircylindertoalternating

movementinstantly.

Note:Setthestandardairpressureoftheregulator(option)to5kgf/cm2.

(2)Incaseofusingthekneeswitch④asthealternatingswitch,connect2-pinconnector⑤ofOPTION

Btothekneeswitch④.

(3)Connecttheurethanetube⑥extendedfromthesewingmachineheadtoAport⑦ofthesolenoid

valve③.

Note:Foryoursafety,alwaysturno󱐯thepowerswitchwheneverconnectordisconnectconnectors.

PREPARATION FOR OPERATION

⑥

④

⑦

Pportto

theairsupplysource

Aircylinderusedforalternatingmovementis

builtinthesewingmachinehead

Aportto

theflowcontrol

Rport

theexhaustvalve

Solenoidvalve

(Option)

Regulator

(Option)

Kneeswitch

LF-FM-CFT

(Option)

①

OPTIONBOPTIONAF・L S.M.

②

③

⑤

—1 —

2 Setting up the activating speed of the air cylinder

( 1 ) Whencontrolthepullingspeedoftheaircylinder,adjusttheairowofAportonthesolenoid

valve.

( 2 ) Whencontrolthepushingspeedoftheaircylinder,adjusttheexhaustvalveofRportonthe

solenoidvalve.

3 Adjustment of the needle stopping position

1 . Adjustment of “UP” position

Whenthepedaliskickeddownbyheel,themachinestopsat“UP”position.

Ifmarksdeviatelargerthan3mm,adjustasfollows.

( 1 )Disconnecttheplug(12pins)ofcablefromthemachinehead.

( 2 )Runthemachineandstopat“UP”position.

( 3 )Whileholdingthepulley,insertthe“Adjustingtool”inthehole Ⓐ,thenturnthetool.

2 . Adjustment of “Down” position

Whenthepedalis“Neutral”themachinestopsat“Down”position.

Ifmarksdeviatelargethan5mm,adjustasfollows.

( 1 )Disconnecttheplug(12pins)ofcablefromthemachinehead.

( 2 )Runthemachineandstopat“Down”position.

( 3 )Whileholdingthepulley,insertthe“Adjustingtool”inthehole Ⓑ,thenturnthetool.

3 . Conrmthestopoperation,thensettheplug(12pins)comingfromthemachineheadintothe

receptacle.

PREPARATION FOR OPERATION

Timingmark

Whitemark

Blackmark

Upposition

Downposition

Adjustingtool

UP上

later

earlier

DOWN下 Timingoftheneedle

Ⓐ

Ⓑ

—2 —

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belowgure.

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

Oillevelmark

—3 —

3 Lubrication condition

Seedrippingofoilthroughtheoilsightwindowto

checkoilingconditionduringoperation.

USAGE PRECAUTION

4 Adjustment of lubrication to the

rotating hook

5 Precaution for the built-in type detector

1 . Sincetheopticaltypedetectingelementisusedinthedetector,preventdustoroilfromstickingto

thedetectingplatewhenthesewingmachinepulleyisremovedforadjustment.

 Iftheyhavestuck,wipethemo󱐯withsoftclothcarefullysothatthesurfaceisnotscratched,do

notletoilpermeatetheclearanceonthedetectingplate.

2 . Incaseofdisconnectionofthepositiondetectorconnector,runningo󱐯thebeltorcomplete

constraintandoverload,themotorisautomaticallyturnedo󱐯afterpredeterminedtimetoprevent

burningofthemotor.(However,incaseofhalf-constraintandoverload,thepowermaynotbe

turnedo󱐯.)Afterthefailureiseliminated,thenormaloperationisresumedbyturningo󱐯thepower

oncethenturningonagain.

 Thesameoperationoccursforthedetectormalfunctionorthelinebreakage.

6 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.

7 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.

Adjusting

screw

Decrease Increase

Nut

Oilsightwindow

—4 —

1 Installation of needles

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

2 Winding of the bobbin thread

Note: When bobbin thread is wound, keep the presser foot lifted.

　Adjustment ●Tension of wound thread Slackwindingisrecommendedforpolyesterthreadand

nylonthread.

●Conically wound thread Movethethreadguidetowardsmallerdiameterofwound

threadlayer.

●Amount of wound thread Loosenthewindingamountadjustmentscrewtodecrease

threadwindingamountandtightenthescrewtoincrease

threadwindingamount.

HOW TO USE

Windingtension

adjustmentnut

Evenwinding

amountof80%

offullcapacity

Windingamount

adjustmentscrew

Threadguide

Double-Needle

Inserttheneedleuptothebottomofneedle

clampandtightenthescrewkeepingthe

longgroovesideofneedlefacetoface

Insuﬃcientinsertion

Gap

Longgroovesareopposite

Longgroove

leftside

Needledistorted

Single-needle

—5 —

3 Selection of the thread

Itisrecommendedtouse“S”twistthreadintheleftneedle(viewed

fromfront),and“Z”twistthreadintherightneedle.

Whendiscriminateuseofneedlethreadsisimpossible,use“Z”twist

threadinboththeneedles.

Forbobbinthread,“S”twistthreadaswellas“Z”twistthreadcanbe

used.

4 Threading of needle threads

1 . Passeachneedlethreadthroughthreadguide(A).

 Note:Whenthinslipperythread(polyesterthreadorlament

thread,etc.)isused,

 Passthethreadthroughthreadguide(B)aswell.

2 . Withthethreadtake-upleverlocatedattheuppermostposition,

passeachneedlethreadintheordershowninthefollowinggure.

 Note:Pushingtheneedlethreadtensionreleasingbuttonshown

inthegurebelowopensthesauceroftheneedlethreadtension

adjuster,andtheneedlethreadcaneasilypulledout.

HOW TO USE

Threadtensionreleasingbutton

R9L8

L9 R

①

Threadtensionreleasingbutton

③

②

④

⑤

⑥

⑦

⑧

⑩

⑪

⑫

⑬

⑭

⑮

⑨

LU2-4730 LU2-4710

Stwistthread

Ztwistthread

A B A AB

—6 —

5 Adjustment of feed (stitch) length and backstitch

●Adjustmentoffeed(stitch)length…Adjustfeedlengthbyturningthefeedlengthsettingdialwhile

pushingPUSHlever.

Note:Dependinguponthestitchlength,themaximumsewingspeedsaredi󱐯erent.

 Withreferringtothespecicationsonpage24,pleaseoperatethesewingmachineatthespeed

lessthanthematchingsewingspeedwiththestitchlength.

●Backstitch…Directionofstitchingcanbereversedbydepressingthereversesewingleverorpushing

thetouchbackswitch.

6 Setting of bobbins

( 1 ) Pullout5cmthreadtailfrombobbins.

( 2 ) Putbobbinsintohooksinthedirectionasthe

followinggure.

7 Adjustment of the needle

thread guide

Adjusttheneedlethreadguideoftheneedle

threadtensionadjusteraccordingtothefabric,the

thread,andsewingcondition.

Needle

thread

guide

position

Leftside Center Rightside

Fabric Heavy Standard Light

Needle

thread

supply

More Standard Less

HOW TO USE

Feedlengthsettingdial

Reversesewinglever

Touchbackswitch

Bedslide

Hook

Bedslide

Thread

Hook

—7 —

Dieses Handbuch passt für folgende Modelle

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