Mitsubishi Electric LY2-3300-B0B User manual

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.

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

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

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

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

Supply the oil to the tank of the bed

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

bottomlevel.

— 1 —

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

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

● 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 —

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

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.

1 Installation of the needle

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

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 —

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

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

HOW TO USE

— 4 —

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

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.

HOW TO USE

— 5 —

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

: 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

HOW TO USE

— 6 —

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

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.

HOW TO USE

— 7 —

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

LY2-3300-B0B Specications

Model

Specications LY2-3300-B0B

Application Heavymaterial

Max.sewingspeed(rpm) 2,000

Stitchlength(mm) 0to8

Needlebarstroke(mm) 35.0

Threadtake-upleverstroke(mm) 73.0

Alternatingmovement(mm) 2.0to5.0(feedfoot)

Feeddogheight(mm) 1.0

Presserfootstroke(mm)

Hand 6.0

Knee 13.0

Needle DP × 17#22(DB× 1#22)

Hook(verticalrotatinghook) Large

Lubricationsystem Manuallubrication(Thehookissupplied

withoilautomaticallyfromthetank)

Beddimensions(mm) 475 ×178

Note:●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

— 8 —

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

Printed in Japan

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

Mitsubishi Electric LY2-3300-B0B User manual

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