Mitsubishi Electric LY2-3750-B1T Bedienungsanleitung

A180E301P02

INSTRUCTION MANUAL

SINGLE-NEEDLE LOCKSTITCH UPPER AND LOWER FEED

AUTOMATIC UNDERTRIMMER

INDUSTRIAL SEWING MACHINE

LY2-3750-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 ……………………………………………… 1

1Installationofthekneelifter ……………………………………………………… 1

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

3Lubricationcondition………………………………………………………………… 2

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

5Adjustmentoflubricationtotheuppershaft …………………………………… 2

6Adjustmentoftheoilpump………………………………………………………… 2

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

8Precautionforthebuilt-intypedetector ………………………………………… 3

9Installationofthebeltcover ……………………………………………………… 3

:Precautiononoperation …………………………………………………………… 3

HOW TO USE ……………………………………………… 4

1Installationoftheneedle …………………………………………………………… 4

2Windingofthebobbinthread……………………………………………………… 4

3Threadingoftheneedlethread…………………………………………………… 5

4Adjustmentoffeed(stitch)lengthandbackstitch……………………………… 5

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

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

7Adjustmentofthebobbinthreadtension………………………………………… 6

8Adjustmentofthepresserfootpressure………………………………………… 6

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

:Adjustmentofthefeeddoginclination…………………………………………… 7

AAdjustmentofforward/backwardstitchlength………………………………… 7

BManualPresserbarlifter…………………………………………………………… 8

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

DAdjustmentofthefeedtiming …………………………………………………… 10

EAdjustmentofthethreadtrimmerdevice ……………………………………… 10

FTherotatinghook,bobbincase,andbobbin……………………………………… 13

GAdjustmentofthegapbetweenthepulleyandthemachinehead…………… 13

SPECIFICATIONS ……………………………………………… 14

1 Installation of the knee lifter

1 . Pulloutkneeliftershafts(ontherightand

left)asfaraspossible,andsetthem.

2 . Installthedrivingcrankoneachshaft.

3 . Setalinkbetweentherightandleftdriving

crankstoconnectthem.

4 . Installthekneelifterleverontheleftdriving

crank.

5 . Theoperatingforcecanbelightenedby

connectingalinkwiththeinsidescrew Ⓐin

theleftdrivingcrankasshowninthedotted

lineofthegure.However,inthiscasethe

operationamountofthekneelifterleveris

increased.

PREPARATION FOR OPERATION

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3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.

USAGE PRECAUTION

Timingmark

Rotatingdirection

1stmark Upposition

Downposition

White

Black3rdmark

3rdmark

1stmark

Adjustingtool

later

earlier

Blackmark

Whitemark

Timingoftheneedle

Ⓐ

Ⓑ

Kneeliftershaft

Drivingcrank

Kneelifterlever

Collar

Hingedscrew

Link

screw

Ⓐ

—1 —

2 Lubrication

Filltheoilreservoirwithoilupto“H”line.

Oillevelshouldbeperiodicallychecked.Ifoillevel

isfoundbelow“L”linereplenishoilto“H”line.

Foroil,use“MC70M”speciedbyMitsubishi.

※Refer

 MC70M：Specicgravity(15℃ )=0.86(g/cm3)

  ：Viscosity(40℃ )=10.9(mm2/s)

Kneelifterpin

Drainoilscrew

Ⓗ Ⓛ

3 Lubrication condition

Checkthattheoilsplashedtheoilsightwindow.

Oilsightwindow

4 Adjustment of lubrication to the

rotating hook

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

byturningthescrew Ⓐ.

IncreaseDecrease

ScrewⒶ

5 Adjustment of lubrication to the

upper shaft

Removethefaceplate,andadjustthelubrication

amountbyturningtheuppershaftlubrication

adjustingscrew.

Increase Decrease

Crank

Uppershaft

Maximum Standard Minimum

AdjustingscrewⒶ

6 Adjustment of the oil pump

Thestandardadjustmentisasfollows:

Theadjustingplatekeepsthebypassholefully

closed.Todecreasesplashing,openthebypass

holeappropriately.

Adjustingplate

Bypasshole

USAGE PRECAUTION

—2 —

7 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.)

8 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.

9 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.

: 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

Oilpumpscreen

●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.

●Leanthemachineheadand

removeanydustand/orlinton

theoilpumpscreen.

—3 —

1 Installation of the needle

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

HOW TO USE

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.

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

—4 —

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.

5 Balance of threads tension

HOW TO USE

①

②

③

④

⑤

⑥

⑦

⑧

⑨

⑩

⑪

Leadthethreadrightward

PUSHlever

Feedlength

settingdial

Reversesewing

lever

Thread

③

④

⑤

⑥

⑧

Touchbackswitch

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

—5 —

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.

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.

HOW TO USE

Tighten

Loosen

Threadtensionnut

ScrewⒶ

Threadtensionspring

Loosen

Tighten

Strengthen

Weaken

Standard

30mm

〈Presserfootpressure〉

Standard

20mm

Weaken Strengthen

〈Feedfootpressure〉

—6 —

9 Adjustment of the feed dog

height

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

wherethefeedliftingrockshaftcrankswings

totheinnermostposition.

2 . LoosenthescrewⒶ.

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

rockshaftcrankinthelateraldirection.

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

feedliftingrockshaftforkandmovingthe

feedbar.

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

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

Throatplate

Feedliftingrockshaftfork

1.0mm

Feedbar

Feeddog

Feedliftingrockshaftcrank ScrewⒶ

: Adjustment of the feed dog

inclination

Thefeeddoghasbeensettostandard

(horizontally).Ifnecessary,adjusttheinclination

accordingtothematerialtobesewnasfollows.

1 . SlightlyloosenscrewⒶ.

2 . Whilepressingthegroovelocatedinthe

eccentricpinbyusingascrewdriver,turn

theeccentricpinclockwise(tolowerthefront

end)orcounterclockwise(toliftthefrontend).

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

Mark

Eccentricpin

Screwdriver

ScrewⒶ

A Adjustment of forward/

backward stitch length

1 . LoosenfoursetscrewsⒶ.

2 . Turnthestitchlengthadjustingpinuntilthe

desiredlengthisreachedasfollows:

( 1 ) Clockwise:Increasesthestitchlengthin

forwardsewing,anddecreasesthestitch

lengthinbacksewing.

( 2 ) Counterclockwise:Decreasesthestitch

lengthinforwardsewing,andincreasesthe

stitchlengthinbacksewing.

HOW TO USE

SetscrewⒶ Bracket Stitchlengthadjustingpin

Positionofmarkon

theeccentricpin Feeddog

Horizontal Standard

Rightabove Frontup

(MAX.)

Rightbelow Frontdown

(MAX.)

—7 —

Inhaltsverzeichnis

Andere Mitsubishi Electric Nähmaschine Handbücher

Mitsubishi Electric

Mitsubishi Electric LY2-3310-B1T Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric PLK-G4030R Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric PLK-G2516 Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric PLK-J-CU-20S Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric PLK-J10050R Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric PLK-G5050R Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric PLK-G1010 Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric PLK-G2008H-BTRM Technisches Handbuch

Mitsubishi Electric

Mitsubishi Electric LU2-4400-B0B Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric LT2-2220-B0B Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric MP-G10-AH Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric PLK - G Series Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric PLK-J2516-YU Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric PLK-G4030 Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric MP-G10-EX Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric DY-253 Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric PLK-J10050R3 Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric PLK-J2516R-YU Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric PLK-G2010R Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric PLK-J4040R Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric MP-G10-AO Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric PLK-G3040R Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric PLK-G5050 Bedienungsanleitung

Mitsubishi Electric

Mitsubishi Electric PLK-G-CU-20 Bedienungsanleitung

Beliebte Nähmaschine Handbücher anderer Marken

Riccar

Riccar RL634DE Bedienungsanleitung

Pfaff

Pfaff 3307-1 SERIES Bedienungsanleitung

Siruba

Siruba C007JP Bedienungsanleitung

Husqvarna Viking

Husqvarna Viking Designer SE Bedienungsanleitung

Singer

Singer 148-5 Bedienungsanleitung

IKEA

IKEA SY Bedienungsanleitung

Pfaff

Pfaff 571 Bedienungsanleitung

Singer

Singer 15-91 Bedienungsanleitung

Brother

Brother BB370 Bedienungsanleitung

Pegasus

Pegasus WT100 Series Bedienungsanleitung

Reliable

Reliable 7100DB Bedienungsanleitung

Pfaff

Pfaff 937 Bedienungsanleitung

Singer

Singer 6038 Bedienungsanleitung

Singer

Singer 413K Bedienungsanleitung

Pfaff

Pfaff 1471 E1 Bedienungsanleitung

Kenmore

Kenmore 16677 - Serger Sewing Machine Bedienungsanleitung

HIGHLEAD

HIGHLEAD GC2008-M Bedienungsanleitung

Singer

Singer 400W4 Bedienungsanleitung