A180E326P02

INSTRUCTION MANUAL

SINGLE-NEEDLE LOCKSTITCH UPPER AND LOWER FEEDCYLINDER-BED INDUSTRIAL SEWING MACHINE

LY3-6840-B0TMODEL

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.

CONTENTSPREPARATION FOR OPERATION ……………………………………………… 11Installationofthesewingmachine………………………………………………… 12Adjustmentoftheneedlestoppingposition……………………………………… 1

USAGE PRECAUTION ……………………………………………… 21Installationofthekneelifter ……………………………………………………… 22Lubrication…………………………………………………………………………… 23Lubricationcondition………………………………………………………………… 24Adjustmentoflubricationtotherotatinghook ………………………………… 35Adjustmentoflubricationtotheuppershaft…………………………………… 36Periodicalcleaning…………………………………………………………………… 47Precautionforthebuilt-intypedetector ………………………………………… 48Installationofthebeltcover ……………………………………………………… 49Precautiononoperation …………………………………………………………… 4

HOW TO USE ……………………………………………… 51Installationoftheneedle…………………………………………………………… 52Windingofthebobbinthread……………………………………………………… 53Threadingoftheneedlethread…………………………………………………… 64Adjustmentoffeed(stitch)lengthandbackstitch……………………………… 65Balanceofthreadstension ………………………………………………………… 66Adjustmentoftheneedlethreadtension………………………………………… 77Adjustmentofthebobbinthreadtension………………………………………… 78Adjustmentofthepresserfootpressure………………………………………… 79Adjustmentofthefeeddogheight ……………………………………………… 8:Thefeedbardeflectionpreventiondevice ……………………………………… 8AAdjustmentofforward/backwardstitchlength………………………………… 9BManualPresserbarlifter…………………………………………………………… 9CAdjustmentofthekneelifteroperatingforce…………………………………… 9DAdjustmentofthefeedfootandthepresserfoot ………………………………10EAdjustmentthefeedtiming(feedupper/lowerposition) ……………………12FAdjustmentofthefeedtiming ……………………………………………………13GAdjustmentofthefeeddog’sforward/backwardposition……………………13HTherotatinghook,bobbincase,andbobbin………………………………………13IAdjustmentofthegapbetweenthepulleyandthemachinehead……………13

ADDENDIX ………………………………………………14Tableshape………………………………………………………………………………14

SPECIFICATIONS ………………………………………………15

1 Installation of the sewing machine

1 . Preparethesewingmachinetable. (Refertotheappendixtabledrawing.)2 . Alignthetwoenclosedvibrationpreventingrubberswiththeholehas11indiameter.

3 . Setthesewingmachineheadonthetablewhilealigningitwiththeholehas11indiameter.Then,tightenwiththeenclosedscrews,washersandnuts.Note:Makesurethatthesewingmachine

headdoesnottiltinthedirectionofthecylinderend.

PREPARATION FOR OPERATION

50

106

109

170

220

8683

9

4-φ11

φ32

90

23

124.7

Vibration preventing rubber

2 Adjustment of the needle stopping position

1 . Adjustment of “UP” positionWhenthepedaliskickeddownbyheel,themachinestopsat“UP”position.Ifmarksdeviatelargerthan3mm,adjustasfollows.( 1 )Disconnecttheplug(12pins)ofcablefromthemachinehead.( 2 )Runthemachineandstopat“UP”position.( 3 )Whileholdingthepulley,insertthe“Adjustingtool”inthehole Ⓐ,thenturnthetool.

2 . Adjustment of “Down” positionWhenthepedalis“Neutral”themachinestopsat“Down”position.Ifmarksdeviatelargethan3mm,adjustasfollows.( 1 )Disconnecttheplug(12pins)ofcablefromthemachinehead.( 2 )Runthemachineandstopat“Down”position.( 3 )Whileholdingthepulley,insertthe“Adjustingtool”inthehole Ⓑ,thenturnthetool.

3 . Confirmthestopoperation,thensettheplug(12pins)comingfromthemachineheadintothereceptacle.

Timing mark

Rotating direction

1st mark “Up” position

“Down” position

White

Black3rd mark

3rd mark

1st mark

Adjusting tool

laterearlierBlack mark

White mark

Timing of the needle

Ⓐ

Ⓑ

— 1 —

1 Installation of the knee lifter1 . Fixthekneelifterconnectingrod1withthescrewontothekneeliftercrank1installedonthefrontofthebed.

2 . Installthekneeliftercrank2tothebottomendofthekneelifterconnectingrod1,andfixwiththescrew.3 . Setthekneeliftingcoveronkneelifterconnectingrod2,andfixthekneelifterconnectingrod2ontothekneeliftercrank2withthescrew.

Note:Bylooseningthescrewonthekneeliftercrank2,thekneeliftingcovercanbemovedtoapositionsuitablefortheworkconditions.

3 Lubrication conditionCheckthattheoilsplashedtheoilsightwindow.

2 LubricationDuringoperation,checktheoillevelperiodically,andincaseswheretheoillevelisbelowⓁline,replenishtheoilsupplyuptoⒽline.Foroil,use“MC70M”specifiedbyMitsubishi.※ Refer MC70M：Specificgravity(15℃ )=0.86(g/cm3) ：Viscosity(40℃ )=10.9(mm2/s)

USAGE PRECAUTION

Knee lifter crank 1

Knee lifter crank 2

Knee lifter connecting rod 1

Knee lifter connecting rod 2

Knee lifting cover

Screw

Oil sight window

Ⓗ

Ⓛ

— 2 —

4 Adjustment of lubrication to the rotating hookThelubricationamounttothehookcanbeadjustedwiththeadjustingscrewintheuppercylindercoverⒶhole.

5 Adjustment of lubrication to the upper shaftRemovethefaceplate,andadjustthelubricationamountbyturningtheuppershaftlubricationadjustingscrew.

Increase Decrease

Crank

Upper shaft

Maximum Standard Minimum

Adjusting screw Ⓐ

USAGE PRECAUTION

Upper cylinder cover Ⓐ

Adjusting screw

Adjusting screw

Ⓐ

Decrease Increase

— 3 —

6 Periodical cleaning

1 . Machine

USAGE PRECAUTION

●Tiltthesewingmachine,andremovethelintinthepumpfilter.

2 . MotorRemovedustfromthemotorfiltereveryoneortwomonths.(Continuedoperationwiththefiltercloggedwithlintordustmayoverheatthemotor.)

3 . Control BoxRemovedustfromtheconnector.(Iftheconnectoriscoveredwithdust,themachinemightmalfunction.)

7 Precaution for the built-in type detector

1 . Sincetheopticaltypedetectingelementisusedinthedetector,preventdustoroilfromstickingtothedetectingplatewhenthesewingmachinepulleyisremovedforadjustment.

Iftheyhavestuck,wipethemoffwithsoftclothcarefullysothatthesurfaceisnotscratched,donotletoilpermeatetheclearanceonthedetectingplate.

2 . Incaseofdisconnectionofthepositiondetectorconnector,runningoffthebeltorcompleteconstraintandoverload,themotorisautomaticallyturnedoffafterpredeterminedtimetopreventburningofthemotor.(However,incaseofhalf-constraintandoverload,thepowermaynotbeturnedoff.)Afterthefailureiseliminated,thenormaloperationisresumedbyturningoffthepoweroncethenturningonagain.

Thesameoperationoccursforthedetectormalfunctionorthelinebreakage.

8 Installation of the belt cover1 . Installthebeltcoveronthemachinesideforsafety.Refertotheprovidedinstructiondocumentcontainedinthesamepackage.

2 . Installthebeltcoveronthemotorsideforsafety.

9 Precaution on operation( 1 ) Whenthepoweristurnedonoroff,keepfootawayfromthepedal.

( 2 ) Itshouldbenotedthatthebrakemaynotworkwhenthepowerisinterruptedorpowerfailureoccursduringsewingmachineoperation.

( 3 ) Sincedustinthecontrolboxmightcausemalfunctionorcontroltroubles,besuretokeepthecontrolboxcovercloseduringoperation.

( 4 ) Donotapplyamultimetertothecontrolcircuitforchecking,otherwisevoltageofmultimetermightdamagesemiconductorcomponentsinthecircuit.

Throat plate rest

Hook

Filter

●Removethethroatplateandfeeddog,andremoveanydustfromthethroatplaterest.

●Removethehookcoverattheendofthecylindersection,andtheremovethedustandlintaroundthehookandinthebobbincase.

— 4 —

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.

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

HOW TO USE

— 5 —

3 Threading of the needle threadWiththethreadtake-upleverlocatedattheuppermostposition,passtheneedlethreadintheordershowninthefollowingfigure.

HOW TO USE

①②

⑥

④③

⑤

⑧

⑨

⑦

⑩⑪Lead the thread rightward

PUSH lever

Feed length setting dial

Reverse sewing lever

Oil sight window

Thread

③

④

⑤

⑥

⑧

Touch back switch

5 Balance of threads tensionA ○

Balanced tension

B ×

Tight the needle thread tension or loose the bobbin thread tension

C ×

Loose the needle thread tension or tight the bobbin thread tension

4 Adjustment of feed (stitch) length and backstitch

●Adjustmentoffeed(stitch)length…AdjustfeedlengthbyturningthefeedlengthsettingdialwhilepushingPUSHlever.

●Backstitch…Directionofstitchingcanbereversedbydepressingthereversesewingleverorpushingthetouchbackswitch.

●Touchbackswitch…Inthecasethattheswitchisturnedtothearrowdirectionby180°,nobackwardstitchingoccursevenwhentheswitchispushed.

Usethisfunctiontoavoidthemalfunctionsuchasunnecessaryreversestitchinginthecasethatthefabriccomesincontactwiththeswitchduringsewing.

— 6 —

6 Adjustment of the needle thread tension

●Theneedlethreadtensionshouldbeadjustedonthebasisofthebobbinthreadtension.

●Adjusttheneedlethreadtensionbyturningthethreadtensionnut.

Theneedlethreadtensioncanbealsoadjustedbychangingintensityandmovablerangeofthethreadtake-upspringincaseofsewingthespecialfabricandthread.

7 Adjustment of the bobbin thread tension

1 . ThebobbinthreadtensioncanbeadjustedbyturningthescrewⒶ.

8 Adjustment of the presser foot pressure

1 . Adjustthepresserfootpressureaccordingtothefabricbyturningthepressureadjustingscrew.

2 . Pressureontheboththepresserfootandthefeedfootcanbeadjusted.(Theadjustingscrewpositionisfactory-adjustedasshowninthefigure.)

3 . Sewingpressureshouldbeadjustedtotheminimumrequiredstrength.

HOW TO USE

StrengthenWeaken

〈Presser foot pressure〉

Standard35 mm

Standard25 mm

Weaken Strengthen

〈Feed foot pressure〉

Tighten

Loosen

Thread tension nut

Screw Ⓐ

Thread tension spring

LoosenTighten

— 7 —

9 Adjustment of the feed dog height

●Two0.2mmthickspacersareinstalledbetweenthefeeddogandfeedbar.Theprojectionamountofthefeeddogfromthethroatplateissetto1.2mm.

( 1 ) Removetheuppercylindercoverandthroatplate.( 2 ) Removetwoscrewsfixingthefeeddog,andremovethefeeddog.( 3 ) Removeorinsertspacerstoadjustthefeeddogprojectionamount.

No. of spacers Projection amount (mm)0 0.81 1.02 1.23 1.4

Note:Twoextraspacersareprovidedintheaccessories.

Throat plateUpper cylinder cover

Feed dog Spacer 0.2t

Feed bar

1.2 mmThroat plate

Feed dog

: The feed bar deflection prevention device

1 .Deflectionofthefeedbarispreventedbypressingasquareblockagainstthelowersurfaceoftheslotonthefeedbartoapplypressingforce.( 1 ) Removetheuppercylindercover.( 2 ) Loosenthetwolockingscrewsfixingthe

eccentricshaft.( 3 ) Turnthepulley,lowerthefeedbar,and

thenadjusttheeccentricshaft.( 4 ) Lowertheeccentricdirection,andadjust

thepositionofthesquareblock. (Theeccentricdirectionoftheeccentric

shaftissetdirectlyabove.)( 5 ) Alwayssecurelytightenthetwolocking

screws.Note:Iftheeccentricdirectionisloweredtoo

far,thepulleymaybecomeheavy.

Feed dogEccentric shaft Square block

Feed bar

Feed bar

Eccentric shaft

Square blockSet screw

HOW TO USE

— 8 —

A Adjustment of forward/backward stitch length

1 . LoosenfoursetscrewsⒶ.2 . Turnthestitchlengthadjustingpinuntilthedesiredlengthisreachedasfollows:( 1 ) Clockwise:Increasesthestitchlengthin

forwardsewing,anddecreasesthestitchlengthinbacksewing.

( 2 ) Counterclockwise:Decreasesthestitchlengthinforwardsewing,andincreasesthestitchlengthinbacksewing.

B Manual Presser bar lifter1 . Turnthepresserbarlifterinthedirectionofthearrow.Thisraisesthepresserfoot.

C Adjustment of the knee lifter operating force

1 . LoosenthenutⒶonthepresserdrivearm.2 . Adjustthepositionortheroller.( 1 ) If“P”islengthened,thekneelifteroperatingforcewillbecomeheavier,butthekneelifteroperatingamountwilldecrease.

( 2 ) If“P”isshortened,thekneelifteroperatingforcewilllighten,butthekneelifteroperatingamountwillincrease.Note:“P”issettothemaximumasthe

defaultstate.Nut Ⓐ

P

Set screw Ⓐ Bracket Stitch length adjusting pin

Presser bar lifter

HOW TO USE

— 9 —

D Adjustment of the feed foot and the presser foot

1 . Adjustment of alternating movement( 1 ) Thealternatingmovementonthefeedfoot

andthepresserfootcanbeadjustedbyusingtheadjustingdiallocatedonthetopcover.

( 2 ) Facethedesirednumberprintedonthedialtothematchingmarklocatedonthetopcover.

( 3 ) Thenumberprintedonthedialrepresentsthepossibleprotrusionofthefeedfootandpresserfootfromthethroatplatewhenthealternatingmovementsontheseareevenlyset.

( 4 ) Ifthealternatingmovementsareevenlyset,theycanbereadjustedupto2.0to5.0mm.

2 . To change the balance of the alternating movements between the feed foot and presser foot( 1 ) Forexample,toincreasetheriseofthefeed

foot,anddecreasetheriseofthepresserfoot.①Removetherubberpluglocatedonthetopcover.②Turnthepulleyuntilthepresserfootisslightlyraisedfromthethroatplate.③LoosenthesetscrewⒶ(ontherightside)locatedonthefeedliftingrockshaftcrank(right).④Thebuilt-inspringpullsdownthepresserfootuntilitmakescontactwiththethroatplate.Then,tightenthesetscrewⒶ.⑤Thiscompletestheadjustment,i.e.,theprotrusionofthepresserfoothasbeendecreasedbyasetdistance.And,theverticalmotionofthefeedfoothasbeenincreasedbythatsamedistance.

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

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

Thisdecreasestheriseofthefeedfoot.

Alternating movement adjusting dialMatching mark

Presser foot

Feed foot

2.0 to 5.0 mm

Rubber plug

Set Screw Ⓐ

Feed lifting rock shaft crank (right)

HOW TO USE

— 10 —

HOW TO USE

3 . Installing the feed regulator bracketShoulditbenecessarytodismountandthefeedregulatorbracketanditsrelatedparts,usetheprocedureexplainedbelow.Note:Ifthefeedregulatorbracketispoorlypositioned,theresultantalternatingmovementsmaybetooshortorlong,causingdefectivemachineoperation.( 1 ) SettheclearancebetweenspecialscrewⒶlocatedontheregulatorstudandthesidewallofthemachinearmto26.5mmasillustratedtotheleft.(Usea26.5mmspacerbetweentheseparts.Thisfacilitatestheoperation.)

( 2 ) Withthefeedregulatorstudheldasexplainedinstep( 1 )above,adjustthefeedregulatorbracket.Thisadjustmentshouldinsureaclearanceof12mmbetweentheperipheryofpinⒷlocatedonthefeedregulatorbracketandthetopcovermountingfacelocatedonthearm.TightenscrewsⒸ.

4 . Feed pitch adjustment of feed footTheratiooftheupperfeedamount(ofthefeedfoot)tothelowerfeedamount(ofthefeeddog)hasbeenadjustedto1:1.However,thefeedfootfeedingamountcanbeincreasedordecreaseddependingontheoperatingconditions.( 1 ) Loosenthenutlocatedontheupperfeed

rockshaftcrank(left),andshifttoadjustthepositionofthesquareblockupwardordownward.

Upperposition:Feedpitch→Small Lowerposition:Feedpitch→Large

Ⓑ

Ⓒ ⒶFeed regulator bracket

Feed regulator stud

26.5 mm

12 mm

Nut

Upper feed rock shaft crank (left)

— 11 —

E Adjustment the feed timing (feed upper / lower position)( 1 ) Removethepartsintheorderoftheuppercylindercover,throatplate,eccentricshaft,feedbarsupportscrew,feedbar,hookcover,throatplaterest,andhook.

( 2 ) Next,removethescrewsfixingthepresserplate,spacer,andspecialplate.( 3 ) Aligntheneedlebartothelowestposition,andthenturnthepulleyforwardtoraisetheneedlebar.Alignthelineetchedatthebottomoftheneedlebarwiththelowerendoftheneedlebarmetal.

( 4 ) Assemblesothatthematchmarkonthefeeddrivingcamiswithinthe20°rangeshowninthedrawing.Note:Ifthematchmarkisonetoothtotherightfromthe20°rangeinthedrawing,theneedlewill

puncturethefabricafterthefeediscompletelysunken,orafterthefabricisfed.Thus,thisissuitableforsewingthickfabrics.

Note:Ifthematchmarkisonetoothtotheleftfromthe20°rangeinthedrawing,thefabricwillbefedwhilethebalancetightensthethread,sothethreadtighteningwillimprove.

HOW TO USE

Hook cover

Throat plate rest

Throat plate

Feed dog Feed bar

Eccentric shaft

Screw

Lower shaft

Feed driving cam holder

Feed driving camSpecial plate

SpacerPresser plate

Rotating hook

Lower shaft

20°

Feed driving cam

Matching mark

— 12 —

I Adjustment of the gap between the pulley and the machine head

Thedetector’sreflectionplateisinstalledontheinnersideofthepulley.Soacorrectdistancemustbekeptwiththedetectorbody.Thegapbetweenthepulleyandthemachineheadmustbe6.5mm.

H The rotating hook, bobbin case, and bobbin

1 . Alargehookforautomaticlubricationisused.2 . Also,useabobbincasewhosebottomhasspringⒶacapableofpreventingracing.

3 Thebobbinprovidedinthepackagecanbeused.

Detector body

6.5 mmAdjusting tool (Enclosed in the accessary box)

Pulley

HOW TO USE

Ⓐ

Rotating hook

Bobbin case

F Adjustment of the feed timing1 . Thestandardpositionoftheeccentricfeedcamandeccentricfeedliftingcamareillustratedtotheright.

2 . Toadjusttheposition,firstopenthetopcover.Properlyslidetheeccentriccam.

3 . Theeccentricfeedcamcanalsobeadjustedbyremovingtherubberpluglocatedonthetopcover,andtheuppereccentricfeedliftingcamcanalsobeadjustedbyremovingtherubberpluglocatedonthearm.

Inthelattercase,however,thebuilt-inbevelgearisconcealed;careshouldbetakenwhenadjusting.

G Adjustment of the feed dog’s forward / backward position

1 . Setthefeedadjustmentdialtothemaximumsetting.

2 . Tiltthesewingmachineunittotheback.3 . Graduallyturnthepulleytowardthefront,andloosenandadjustthefeedrockshaftcrankscrew①sothatthefeeddoesnotcontactthefrontandbackofthethroatplategrooveduringforwardandreversefeed.

4.Afteradjusting,tightenscrew①

1st screw 2nd screw 1st screwUpper shaft

Upper eccentric feed lifting cam Eccentric feed camBevel gear for

upper shaft

Top coverRubber plug

Rubber plug

①

— 13 —

ADDENDIX

R10 535

300

290

66

33

38

41

220

83

86 109

170

145 220

14 106

9

41090

100

90

32

50

4-φ11

3-φ8.5

300A-A

1200

A

R10

R10

R10R10

R10

R10

R2

R2

R10

R10

R2

φ32

φ40

R10

60

159

3-φ26V-groove (60°depth 1)

57

23

124.7

φ1815

A

φ19

2315

10

R2

41

Table shape

— 14 —

LY3-6840-B0T Specifications

ModelSpecifications

LY3-6840-B0T

Application Heavymaterial

Max.sewingspeed(rpm) 2,000

Stitchlength(mm) 0to7

Needlebarstroke(mm) 38.0

Threadtake-upleverstroke(mm) 75.8

Alternatingmovement(mm) 2.0to5.0(feedfoot)

Alternatingmovementchangingsystem Dial(One-touch)

Feeddogheight(mm) 1.2

Presserfootstroke(mm)Hand 6.0

Knee 15.0

Needle DP × 17#22(DB× 1#22)

Hook(verticalrotatinghook) Large

Bobbincase Withracingpreventionspring

Lubricationsystem Automaticlubrication

Touchback ○

Materialhandingarea(mm) Width335 ×Height145

Cylinderbeddiameter(mm) φ 47

Dimensiononleftsideofneedledrop(mm) 6.5

Note:●Thebobbinshouldbeofhighqualityfreefromdeformation. ●Somematerialsand/orsewingconditionsmayrequirespecificationsotherthanthoselisted

above. ●Thesespecificationsaresubjecttochangeformachineimprovement.

SPECIFICATIONS

— 15 —

Printed in Japan