A180E352P03

INSTRUCTION MANUAL

SINGLE-NEEDLE LOCKSTITCH UPPER AND LOWER FEEDINDUSTRIAL SEWING MACHINE

LY2-3300-B0BMODEL

PRECAUTION BEFORE STARTING OPERATION1 Safety Precautions

1 . Whenturningthepoweron,keepyourhandsandfingersawayfromtheareaaround/undertheneedleandtheareaaroundthepulley.

2 . Thepowermustbeturnedoffwhenthemachineisnotused,orwhentheoperatorleaveshis/herseat.

3 . Thepowermustbeturnedoffbeforetiltingthemachinehead,installingorremovingthe“V”belt,adjustingthemachine,orreplacingparts.

4 . Avoidplacingfingers,hairs,obstacles,etc.nearthepulley,“V”belt,bobbinwinderwheel,ormotorwhenthemachineisinoperation.Injurycouldresult.

5 . Don’tputfingersintothethreadtake-uplevercover,around/undertheneedle,orpulleywhenthemachineisinoperation.

6 . Ifthebeltcover,thefingerguard,and/ortheeyeguardareinstalled,don’toperatethemachinewithoutthesesafetydevices.

2 Precaution before Starting Operation

1 . Ifthemachine’soilpanhasanoilsump,neveroperatethemachinewithoutfillingoilinit.

2 . Ifthemachineislubricatedbyadropoiler,neveroperatethemachinewithoutlubricating.

3 . Whenanewsewingmachineisoperated,verifytherotationaldirectionofthepulleywiththepoweron.

(Thepulleyshouldrotatecounterclockwisewhenviewedfromthepulley.)4 . Verifyvoltageand(singleorthree)phaseindicatedonthenameplateofthemotor.

3 Precaution for Operating Conditions

1 . Avoidusingthemachineatabnormallyhightemperature(35℃orhigher)orlowtemperature(5℃orlower).Otherwise,machinefailuremayresult.

2 . Avoidusingthemachineindustyconditions.3 . Avoidusingthemachineinconditionsfilledwithalotofelectricnoisessuchashigh-frequencywelders.

INTRODUCTION　ThankyouverymuchforpurchasingMitsubishiindustrialsewingmachine.　Pleasereadthisinstructionmanualbeforeoperatingthesewingmachine.Pleasereadalso“SafetyManual”,“InstructionmanualforMitsubishiLimiservoX”andoperatethesewingmachinecorrectlyandsafely.

CONTENTSUSAGE PRECAUTION ……………………………………………… 11Lubrication…………………………………………………………………………… 12Adjustmentoflubricationtotherotatinghook ………………………………… 13Periodicalcleaning…………………………………………………………………… 24Installationofthebeltcover ……………………………………………………… 25Precautiononoperation …………………………………………………………… 2

HOW TO USE ……………………………………………… 31Installationoftheneedle…………………………………………………………… 32Windingofthebobbinthread……………………………………………………… 33Threadingoftheneedlethread…………………………………………………… 44Adjustmentoffeed(stitch)lengthandbackstitch……………………………… 45Balanceofthreadstension ………………………………………………………… 46Adjustmentoftheneedlethreadtension………………………………………… 47Adjustmentofthebobbinthreadtension………………………………………… 58Adjustmentofthepresserfootpressure………………………………………… 59Adjustmentofthefeeddogheight ……………………………………………… 5:Adjustmentofthefeedfootandthepresserfoot ……………………………… 6ATohandlethreadatthestartofsewing ………………………………………… 7

SPECIFICATIONS ……………………………………………… 8

1 Lubrication●Pouroiluptothearrowpositionbeforestartingoperation.　　　　…About3cc　　　　…5,6drops　　　　…1,2dropsForoil,use“PulleySFoil”specifiedbyMitsubishi.※Refer PulleySFoil：Specificgravity(15℃ )=0.86(g/cm3) ：Viscosity(40℃ )=18.0(mm2/s)●Whenanewsewingmachineisusedforthefirsttime,orsewingmachineleftoutofuseforconsiderablylongtimeisusedagain,replenishasuitableamountofoiltotheportionsindicatedbyarrowsinthebelowfigure.

2 Adjustment of lubrication to the rotating hook

AdjustthelubricationamountoftherotatinghookbyturningthescrewⒶ.

USAGE PRECAUTION

Ⓐ

Screw Ⓐ

Decrease Increase

Line

Hole for supply

Supply the oil to the tank of the bedFilloiluptothelinewhentheoilwouldcomebottomlevel.

At ① and ②, please lubricate the oil braid under the rubber plug.

②

①

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3 Periodical cleaning

1 . Machine

2 . MotorRemovedustfromthemotorfiltereveryoneortwomonths.(Continuedoperationwiththefiltercloggedwithlintordustmayoverheatthemotor.)

3 . Control BoxRemovedustfromtheconnector.(Iftheconnectoriscoveredwithdust,themachinemightmalfunction.)

4 Installation of the belt cover1 . Installthebeltcoveronthemachinesideforsafety.Refertotheprovidedinstructiondocumentcontainedinthesamepackage.

2 . Installthebeltcoveronthemotorsideforsafety.

5 Precaution on operation( 1 ) Whenthepoweristurnedonoroff,keepfootawayfromthepedal.( 2 ) Itshouldbenotedthatthebrakemaynotworkwhenthepowerisinterruptedorpowerfailureoccursduringsewingmachineoperation.

( 3 ) Sincedustinthecontrolboxmightcausemalfunctionorcontroltroubles,besuretokeepthecontrolboxcovercloseduringoperation.

( 4 ) Donotapplyamultimetertothecontrolcircuitforchecking,otherwisevoltageofmultimetermightdamagesemiconductorcomponentsinthecircuit.

USAGE PRECAUTION

HookFeed dog

Hook

Feed bar

●Removethethroatplateandcleanthefeeddog.Reassemblyshouldbedonebyscrewinginthescrew2-3rotationsbyhandatfirst,thentighteningthemevenlyusingalong-shaftedscrewdriver.

● Leanthemachineheadandcleanthehookandremoveanydustand/orlintinsidethebobbincase.

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2 Winding of the bobbin threadNote: When bobbin thread is wound, keep the presser foot lifted.

　Adjustment ●Tension of wound thread Slackwindingisrecommendedforpolyesterthreadandnylonthread.

●Conically wound thread Movethethreadguidetowardsmallerdiameterofwoundthreadlayer.

●Amount of wound thread Loosenthewindingamountadjustmentscrewtodecreasethreadwindingamountandtightenthescrewtoincreasethreadwindingamount.

Winding tension adjustment nut

Even winding amount of 80% of full capacity

Winding amount adjustment screw

Thread guide

1 Installation of the needleNote: Before installing the needles, be sure to turn off 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：Ifthreadsnappingoccursduringreversesewingwithpolyesterthreads,itmaybeavoidedbyfittingtheneedlewiththelonggrooveshiftedtothefrontside.Normally,avoidfittingtheneedlewiththegroovefacingbackward.

BothneedlesDP× 17andDB× 1canbeused.Usethetimingmarksasshowninthefigure.

HOW TO USE

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5 Balance of threads tension

6 Adjustment of the needle thread tension

●Theneedlethreadtensionshouldbeadjustedonthebasisofthebobbinthreadtension.

●Adjusttheneedlethreadtensionbyturningthethreadtensionnut.

Theneedlethreadtensioncanbealsoadjustedbychangingintensityandmovablerangeofthethreadtake-upspringincaseofsewingthespecialfabricandthread.

3 Threading of the needle threadWiththethreadtake-upleverlocatedattheuppermostposition,passtheneedlethreadintheordershowninthefollowingfigure.

4 Adjustment of feed (stitch) length and backstitch

●Adjustmentoffeed(stitch)length…Adjustfeedlengthbyturningthefeedlengthsettingdialwhiledepressingthereversesewinglever.

●Backstitch…Directionofstitchingcanbereversedbydepressingthereversesewinglever.

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

④⑤⑪

⑩

⑨

⑧

⑦

①

HOW TO USE

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7 Adjustment of the bobbin thread tension

1 . ThebobbinthreadtensioncanbeadjustedbyturningthescrewⒶ.

8 Adjustment of the presser foot pressure

1 . Adjustthepresserfootpressureaccordingtothefabricbyturningthepressureadjustingscrew.

2 . Pressureontheboththepresserfootandthefeedfootcanbeadjusted.(Theadjustingscrewpositionisfactory-adjustedasshowninthefigure.)

3 . Sewingpressureshouldbeadjustedtotheminimumrequiredstrength.

9 Adjustment of the feed dog height

1 . Turnthepulleyandstopitatthepositionwherethefeedliftingrockshaftcrank(right)swingstotheinnermostposition.

2 . LoosenthescrewⒶ. Note:Becarefulnottomovethefeedliftingrockshaftcrank(right)inthelateraldirection.

3 . Adjustthefeeddogheightbyswingingthefeedliftingrockshaftcrank(left)andmovingthefeedbar.

4 . Afteradjusting,fullytightenthescrewⒶ.

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

Screw Ⓐ

Thread tension spring

LoosenTighten

30 mm

<Presser foot pressure>

StrengthenWeaken

Standard

Throat plate1.0 mm

Feed dog

Feed lifting rock shaft crank (left)

Feed bar

Screw Ⓐ

Feed lifting rock shaft crank (right)

20 mmStandard

Strengthen

<Feed foot pressure>

Weaken

HOW TO USE

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: 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 ) Forexample,toincreasetheriseofthefeed

foot,anddecreasetheriseofthepresserfoot.①Turnthepulleyuntilthepresserfootisslightlyraisedfromthethroatplate.②LoosenthesetscrewⒶ(ontherightside)locatedonthefeedliftingrockshaftcrank(right).③Thebuilt-inspringpullsdownthepresserfootuntilitmakescontactwiththethroatplate.Then,tightenthesetscrewⒶ.④Thiscompletestheadjustment,i.e.,theprotrusionofthepresserfoothasbeendecreasedbyasetdistance.And,theverticalmotionofthefeedfoothasbeenincreasedbythatsamedistance.

( 2 ) Asacontrarycase( 1 ),todecreasetheriseofthefeedfoot,andincreasetheriseofthepresserfoot.

First,turnthepulleyuntilthefeedfootisslightlyraisedfromthethroatplate.Next,loosenthescrewⒶ.Finally,tightenthescrewⒶagain.

Thisdecreasestheriseofthefeedfoot.2 . Adjustment of the movement height of the

presser foot and feed footNote:Whensewingathinfabric,theupanddown

movementshouldbeadjustedatminimum.●Toadjust,loosenthescrew,andshiftthepositionofcrankrodboss. Upward →Theupanddownmovement

willincrease.(Max.5mm) Downward→Theupanddownmovement

willdecrease.(Min.2mm)3 . A gap between the feed foot and the presser footNote:Attheconditionthestitchlengthisatmax.,the

min.gapbetweenthefeedfootandthepresserfootisadjustedtobe5mmasstandard.●LoosenthescrewⒶ,thenturnthefeeddrivingshaft,sothatthegapⒷcanbeadjusted. Afteradjusting,fullytightenthescrewⒶ.

4 . Proper timing between the upper and lower feedNote:Althoughtheupperfeedamount(feedfoot)

adjustthelowerfeedamount(feeddog)areadjustedby1:1,pleaseadjusttheupperfeedamountincreasinglyordecreasingly,accordingtothematerialtobesewn.●Toadjust,loosenthenutandshiftthesquareblockupanddown. Upward →Feedingamountwilldecrease Downward→Feedingamountwillincrease

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 rodFeed lifting rock shaft crank (right)

Ⓐ

HOW TO USE

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A To handle thread at the start of sewing

1 . In the case of open sewing:Whentheneedlethreadisnotheldbythepresserfootduringsewing,theendoftheneedlethreadisstitchedontothereversesideofthecloth,thusenhancingasewingfinish.Slowlystarttotakeupafewstitchesatthebeginningsoastopreventtheneedlethreadfrombeingoffoutoftheneedle.

2 . When the needle thread is held by the presser foot:Theendoftheneedlethreadremainsonthesurfaceofthecloth.Tostitchinthisway,itispreferabletopulloutthesewnfabrictotheothersideofthepresserfootattheendofsewing.

Needle thread

Needle thread

Cloth

Needle thread

Cloth

Bobbin thread

HOW TO USE

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LY2-3300-B0B Specifications

ModelSpecifications

LY2-3300-B0B

Application Heavymaterial

Max.sewingspeed(rpm) 2,000

Stitchlength(mm) 0to8

Needlebarstroke(mm) 35.0

Threadtake-upleverstroke(mm) 73.0

Alternatingmovement(mm) 2.0to5.0(feedfoot)

Feeddogheight(mm) 1.0

Presserfootstroke(mm)Hand 6.0

Knee 13.0

Needle DP × 17#22(DB× 1#22)

Hook(verticalrotatinghook) Large

LubricationsystemManuallubrication(Thehookissuppliedwithoilautomaticallyfromthetank)

Beddimensions(mm) 475 ×178

Note:●Thebobbinshouldbeofhighqualityfreefromdeformation. ●Somematerialsand/orsewingconditionsmayrequirespecificationsotherthanthoselisted

above. ●Thesespecificationsaresubjecttochangeformachineimprovement.

SPECIFICATIONS

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Printed in Japan