Mitsubishi Electric LY2-3310-B1T Bedienungsanleitung

A180E388P03

INSTRUCTION MANUAL

SINGLE-NEEDLE LOCKSTITCH UPPER AND LOWER FEED

AUTOMATIC UNDERTRIMMER

INDUSTRIAL SEWING MACHINE

LY2-3310-B1T

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

USAGE PRECAUTION ……………………………………………… 2

1Lubrication …………………………………………………………………………… 2

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

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

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

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

6Precautiononoperation …………………………………………………………… 4

HOW TO USE ……………………………………………… 5

1Installationoftheneedle …………………………………………………………… 5

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

3Threadingoftheneedlethread…………………………………………………… 6

4Adjustmentoffeed(stitch)lengthandbackstitch……………………………… 6

5Balanceofthreadstension ………………………………………………………… 6

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

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

8Adjustmentofthepresserfootpressure………………………………………… 7

9Adjustmentofthefeeddogheight ……………………………………………… 7

:Adjustmentofthefeedfootandthepresserfoot ……………………………… 8

ATohandlethreadatthestartofsewing ………………………………………… 9

BAdjustmentofthethreadtrimmerdevice ……………………………………… 9

CAdjustmentofthegapbetweenthepulleyandthemachinehead…………… 12

SPECIFICATIONS ……………………………………………… 13

1 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(12pins)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2mm,adjustasfollows.

( 1 )Disconnecttheplug(12pins)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(12pins)comingfromthemachineheadintothe

receptacle.

PREPARATION FOR OPERATION

Timingmark

Rotatingdirection

1stmark

Pulley

Upposition

Downposition

1stmark

3rdmark

3rdmark Ⓐ

ⒷAdjustingtool

later

earlier

Pulley

DOWN Timingoftheneedle

—1 —

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

At①and②,pleaselubricate

theoilbraidundertherubberplug.

②

①

Ⓐ

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.

—2 —

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.)

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.

—3 —

4 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.

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

—4 —

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

HOW TO USE

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.

—5 —

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pushingPUSHlever.

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

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

leverorpushingthetouchbackswitch.

●Touchbackswitch…Inthecasethattheswitch

isturnedtothearrowdirectionby180°,no

backwardstitchingoccursevenwhenthe

switchispushed.

 Usethisfunctiontoavoidthemalfunctionsuch

asunnecessaryreversestitchinginthecase

thatthefabriccomesincontactwiththeswitch

duringsewing.

②

⑥

③

④

⑤

⑪

⑩

⑨

⑧

⑦

①

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

Touchbackswitch

PUSHlever

Feedlength

settingdial

Reversesewing

lever

HOW TO USE

—6 —

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

ScrewⒶ

Threadtensionspring

Loosen

Tighten

Standard30mm

Strengthen

<Presserfootpressure>

Weaken

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

StrengthenWeaken

<Feedfootpressure>

—7 —

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