Mitsubishi Electric LY2-3300-B0B Manual de usuario

A180E352P03

INSTRUCTION MANUAL

SINGLE-NEEDLE LOCKSTITCH UPPER AND LOWER FEED

INDUSTRIAL SEWING MACHINE

LY2-3300-B0B

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

USAGE PRECAUTION ……………………………………………… 1

1Lubrication …………………………………………………………………………… 1

2Adjustmentoflubricationtotherotatinghook ………………………………… 1

3Periodicalcleaning…………………………………………………………………… 2

4Installationofthebeltcover ……………………………………………………… 2

5Precautiononoperation …………………………………………………………… 2

HOW TO USE ……………………………………………… 3

1Installationoftheneedle …………………………………………………………… 3

2Windingofthebobbinthread……………………………………………………… 3

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

4Adjustmentoffeed(stitch)lengthandbackstitch……………………………… 4

5Balanceofthreadstension ………………………………………………………… 4

6Adjustmentoftheneedlethreadtension………………………………………… 4

7Adjustmentofthebobbinthreadtension………………………………………… 5

8Adjustmentofthepresserfootpressure………………………………………… 5

9Adjustmentofthefeeddogheight ……………………………………………… 5

:Adjustmentofthefeedfootandthepresserfoot ……………………………… 6

ATohandlethreadatthestartofsewing ………………………………………… 7

SPECIFICATIONS ……………………………………………… 8

1 Lubrication

●Pouroiluptothearrowpositionbeforestarting

operation.

　　　　…About3cc

　　　　…5,6drops

　　　　…1,2drops

Foroil,use“PulleySFoil”speciedby

Mitsubishi.

※Refer



PulleySFoil：Specicgravity(15℃ )=0.86(g/cm3)

  ：Viscosity(40℃ )=18.0(mm2/s)

●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.

2 Adjustment of lubrication to the

rotating hook

Adjustthelubricationamountoftherotatinghook

byturningthescrewⒶ.

USAGE PRECAUTION

Ⓐ

ScrewⒶ

Decrease Increase

Line

Holeforsupply

Supply the oil to the tank of the bed

Filloiluptothelinewhentheoilwouldcome

bottomlevel.

At①and②,pleaselubricate

theoilbraidundertherubberplug.

②

①

—1 —

3 Periodical cleaning

1 . Machine

2 . 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.)

3 . Control Box

Removedustfromtheconnector.(Iftheconnectoriscoveredwithdust,themachinemight

malfunction.)

4 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.

5 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

Hook

Feeddog

Hook

Feedbar

● Removethethroatplateandcleanthe

feeddog.Reassemblyshouldbedoneby

screwinginthescrew2-3rotationsbyhand

atrst,thentighteningthemevenlyusinga

long-shaftedscrewdriver.

● Leanthemachineheadandcleanthehook

andremoveanydustand/orlintinsidethe

bobbincase.

—2 —

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.

Windingtension

adjustmentnut

Evenwinding

amountof80%

offullcapacity

Windingamount

adjustmentscrew

Threadguide

1 Installation of the needle

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

Inserttheneedleuptothebottomof

needleclampandtightenthescrew

keepingthelonggroovesidefacing

totheleft.

Insufficientinsertion Needledistorted

Gap

Longgroove

leftside Timingmark

forDB×1

Timingmark

forDP×17

Needlebar

Note：Ifthreadsnappingoccursduringreversesewingwith

polyesterthreads,itmaybeavoidedbyttingtheneedle

withthelonggrooveshiftedtothefrontside.Normally,

avoidttingtheneedlewiththegroovefacingbackward.

BothneedlesDP × 17and

DB × 1canbeused.

Usethetimingmarksas

showninthegure.

HOW TO USE

—3 —

5 Balance of threads tension

6 Adjustment of the needle

thread tension

●Theneedlethreadtensionshouldbeadjusted

onthebasisofthebobbinthreadtension.

●Adjusttheneedlethreadtensionbyturningthe

threadtensionnut.

 Theneedlethreadtensioncanbealsoadjusted

bychangingintensityandmovablerangeof

thethreadtake-upspringincaseofsewingthe

specialfabricandthread.

3 Threading of the needle thread

Withthethreadtake-upleverlocatedattheupper

mostposition,passtheneedlethreadintheorder

showninthefollowinggure.

4 Adjustment of feed (stitch)

length and backstitch

●Adjustmentoffeed(stitch)length…Adjustfeed

lengthbyturningthefeedlengthsettingdial

whiledepressingthereversesewinglever.

●Backstitch…Directionofstitchingcanbe

reversedbydepressingthereversesewing

lever.

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

Threadtensionnut

Tighten

Loosen

Feedlength

settingdial

Reversesewing

lever

②

⑥

③

④

⑤

⑪

⑩

⑨

⑧

⑦

①

HOW TO USE

—4 —

7 Adjustment of the bobbin

thread tension

1 . Thebobbinthreadtensioncanbeadjusted

byturningthescrewⒶ.

8 Adjustment of the presser foot

pressure

1 . Adjustthepresserfootpressureaccordingto

thefabricbyturningthepressureadjusting

screw.

2 . Pressureontheboththepresserfootand

thefeedfootcanbeadjusted.(Theadjusting

screwpositionisfactory-adjustedasshownin

thegure.)

3 . Sewingpressureshouldbeadjustedtothe

minimumrequiredstrength.

9 Adjustment of the feed dog

height

1 . Turnthepulleyandstopitattheposition

wherethefeedliftingrockshaftcrank(right)

swingstotheinnermostposition.

2 . LoosenthescrewⒶ.

 Note:Becarefulnottomovethefeedlifting

rockshaftcrank(right)inthelateraldirection.

3 . Adjustthefeeddogheightbyswingingthe

feedliftingrockshaftcrank(left)andmoving

thefeedbar.

4 . Afteradjusting,fullytightenthescrewⒶ.

The feed dog height is factory-adjusted to 1.0 mm.

ScrewⒶ

Threadtensionspring

Loosen

Tighten

30mm

<Presserfootpressure>

StrengthenWeaken

Standard

Throatplate 1.0mm

Feeddog

Feedliftingrockshaftcrank(left)

Feedbar

ScrewⒶ

Feedliftingrock

shaftcrank(right)

20mm

Standard

Strengthen

<Feedfootpressure>

Weaken

HOW TO USE

—5 —

: Adjustment of the feed foot

and the presser foot

1 .

To change the balance of the alternating

movements between the feed foot and presser foot

(1)

Forexample,toincreasetheriseofthefeed

foot,anddecreasetheriseofthepresserfoot

①Turnthepulleyuntilthepresserfootis

slightlyraisedfromthethroatplate.

②

LoosenthesetscrewⒶ(ontherightside)

locatedonthefeedliftingrockshaftcrank(right).

③Thebuilt-inspringpullsdownthepresser

footuntilitmakescontactwiththethroat

plate.Then,tightenthesetscrewⒶ.

④Thiscompletestheadjustment,i.e.,the

protrusionofthepresserfoothasbeen

decreasedbyasetdistance.And,the

verticalmotionofthefeedfoothasbeen

increasedbythatsamedistance.

(2)

Asacontrarycase( 1 ),todecreasetheriseofthe

feedfoot,andincreasetheriseofthepresserfoot.

 First,turnthepulleyuntilthefeedfootis

slightlyraisedfromthethroatplate.Next,

loosenthescrewⒶ.Finally,tightenthe

screwⒶagain.

 Thisdecreasestheriseofthefeedfoot.

2 . Adjustment of the movement height of the

presser foot and feed foot

Note:Whensewingathinfabric,theupanddown

movementshouldbeadjustedatminimum.

●Toadjust,loosenthescrew,andshiftthe

positionofcrankrodboss.

 Upward →Theupanddownmovement

willincrease.(Max.5mm)

 Downward→Theupanddownmovement

willdecrease.(Min.2mm)

3 .

A gap between the feed foot and the presser foot

Note:

Attheconditionthestitchlengthisatmax.,the

min.gapbetweenthefeedfootandthepresser

footisadjustedtobe5mmasstandard.

●LoosenthescrewⒶ,thenturnthefeed

drivingshaft,sothatthegapⒷcanbe

adjusted.

 Afteradjusting,fullytightenthescrewⒶ.

4 .

Proper timing between the upper and lower feed

Note:Althoughtheupperfeedamount(feedfoot)

adjustthelowerfeedamount(feeddog)

areadjustedby1:1,pleaseadjusttheupper

feedamountincreasinglyordecreasingly,

accordingtothematerialtobesewn.

●Toadjust,loosenthenutandshiftthesquare

blockupanddown.

 Upward →Feedingamountwilldecrease

 Downward→Feedingamountwillincrease

Nut

Feedliftingrock

shaftcrank(left)

ScrewⒶ

5mmⒷ

Feedfoot

Presserfoot

Feeddrivingshaftcrank(right) Feeddrivingshaft

Screw

Large

Small

Crankrod

Feedliftingrockshaftcrank(right)

Ⓐ

HOW TO USE

—6 —

A To handle thread at the start of

sewing

1 . In the case of open sewing:

Whentheneedlethreadisnotheldbythe

presserfootduringsewing,theendofthe

needlethreadisstitchedontothereverseside

ofthecloth,thusenhancingasewingnish.

Slowlystarttotakeupafewstitchesatthe

beginningsoastopreventtheneedlethread

frombeingo󱐯outoftheneedle.

2 . When the needle thread is held by the

presser foot:

Theendoftheneedlethreadremainsonthe

surfaceofthecloth.

Tostitchinthisway,itispreferabletopull

outthesewnfabrictotheothersideofthe

presserfootattheendofsewing.

Needlethread

Cloth

Needlethread

Cloth

Bobbinthread

HOW TO USE

—7 —

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