Juki LY2-3750-B1T Bruksanvisning

Juki Symaskin LY2-3750-B1T

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A181E09 P013

SINGLE-NEEDLE LOCKSTITCH UPPER AND LOWER FEED

AUTOMATIC UNDERTRIMMER

INDUSTRIAL SEWING MACHINE

MODEL

LY2- -B1T 3750

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 industrial sewing machine.

Please read this instruction manual before operating the sewing machine. Please read also

“Safety Manual”, “Instruction manual for LIMISERVO” 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

Produktspecifikationer

Varumärke:	Juki
Kategori:	Symaskin
Modell:	LY2-3750-B1T

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