JUKI MF-7900D/UT59 User manual

3
CAUTIONS FOR SAFETY
MF-7900,7900D/UT59
No.00
70003572

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For the sewing machine, automatic machine and ancillary devices (hereinafter collectively referred to as
"machine"), it is inevitable to conduct sewing work near moving parts of the machine. This means that there
is always a possibility of unintentionally coming in contact with the moving parts. Operators who actually
operate the machine and maintenance personnel who are involved in maintenance and repair of the machine
are strongly recommended to carefully read to fully understand the following SAFETY PRECAUTIONS
before using/maintaining the machine. The content of the SAFETY PRECAUTIONS includes items which
are not contained in the specications of your product.
The risk indications are classied into the following three different categories to help understand the meaning
of the labels. Be sure to fully understand the following description and strictly observe the instructions.
Warning label
❶
❷
❸
❶•Thereisthepossibilitythatslighttoseriousinjuryordeathmaybecaused.
 •Thereisthepossibilitythatinjurymaybecausedbytouchingmovingpart.
❷•Toperformsewingworkwithsafetyguard.
 •Toperformsewingworkwithsafetycover.
 •Toperformsewingworkwithsafetyprotectiondevice.
❸•BesuretoturnthepowerOFFbeforecarryingout"machine-headthreading",
"needlechanging","bobbinchanging"or"oilingandcleaning".
❸
❷
❶
Electrical-shock
dangerlabel
DANGER :
Thisindicationisgivenwherethereisanimmediatedangerofdeathorserousinjuryifthepersoninchargeoranythird
partymishandlesthemachineordoesnotavoidthedangeroussituationwhenoperatingormaintainingthemachine.
WARNING :
Thisindicationisgivenwherethereisapotentialityfordeathorseriousinjuryifthepersoninchargeoranythird
partymishandlesthemachineordoesnotavoidthedangeroussituationwhenoperatingormaintainingthemachine.
CAUTION :
Thisindicationisgivenwherethereisadangerofmediumtominorinjuryifthepersoninchargeoranythirdpar-
tymishandlesthemachineordoesnotavoidthedangeroussituationwhenoperatingormaintainingthemachine.
Itemsrequiringspecialattention.
Pictorialwarningindication
Thereisariskofinjuryifcontact-
ingamovingsection.
Pictorialwarning
indication
Beawarethatholdingthesewing
machineduringoperationcan
hurtyourhands.
Thereisariskofelectricalshockif
contactingahigh-voltagesection.
Thereisariskofentanglementin
thebeltresultingininjury.
Thereisariskofaburnifcontact-
ingahigh-temperaturesection.
Thereisariskofinjuryifyou
touchthebuttoncarrier.
Beawarethateyedeciencycan
becausedbylookingdirectlyatthe
laserbeam.
Indicationlabel
Thecorrectdirectionisindicated.
Thereisariskofcontactbetween
yourheadandthesewingma-
chine.
Connectionofaearthcableis
indicated.
TO ENSURE SAFE USE OF YOUR SEWING MACHINE
(I)Explanationofrisklevels
(II) Explanationofpictorialwarningindicationsandwarninglabels

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SAFETY PRECAUTIONS
 1. Whenitisnecessarytoopenthecontrolboxcontainingelectricalparts,besuretoturnthepower
offandwaitforveminutesormorebeforeopeningthecoverinordertopreventaccidentleadingto
electricalshock.
Accidentmeans"tocause
personalinjuryordeathor
damagetoproperty."
DANGER
CAUTION
Basicprecaution
 1. Besuretoreadtheinstructionmanualandotherexplanatorydocumentssuppliedwithaccessoriesof
themachinebeforeusingthemachine.Carefullykeeptheinstructionmanualandtheexplanatorydocu-
mentsathandforquickreference.
 2. Thecontentofthissectionincludesitemswhicharenotcontainedinthespecicationsofyourproduct.
 3. Besuretowearsafetygogglestoprotectagainstaccidentcausedbyneedlebreakage.
 4. Thosewhouseaheartpacerhavetousethemachineafterconsultationwithamedicalspecialist.
Safetydevicesandwarninglabels
 1. Besuretooperatethemachineafterverifyingthatsafetydevice(s)iscorrectlyinstalledinplaceand
worksnormallyinordertopreventaccidentcausedbylackofthedevice(s).
 2. Ifanyofthesafetydevicesisremoved,besuretoreplaceitandverifythatitworksnormallyinorderto
preventaccidentthatcanresultinpersonalinjuryordeath.
 3. Besuretokeepthewarninglabelsadheredonthemachineclearlyvisibleinordertopreventaccident
thatcanresultinpersonalinjuryordeath.Ifanyofthelabelshasstainedorcomeunstuck,besureto
changeitwithanewone.
Applicationandmodication
 1. Neverusethemachineforanyapplicationotherthanitsintendedoneandinanymannerotherthanthat
prescribedintheinstructionmanualinordertopreventaccidentthatcanresultinpersonalinjuryor
death.JUKIassumesnoresponsibilityfordamagesorpersonalinjuryordeathresultingfromtheuseof
themachineforanyapplicationotherthantheintendedone.
 2. Nevermodifyandalterthemachineinordertopreventaccidentthatcanresultinpersonalinjuryor
death.JUKIassumesnoresponsibilityfordamagesorpersonalinjuryordeathresultingfromthema-
chinewhichhasbeenmodiedoraltered.
Educationandtraining
 1. Inordertopreventaccidentresultingfromunfamiliaritywiththemachine,themachinehastobeused
onlybytheoperatorwhohasbeentrained/educatedbytheemployerwithrespecttothemachineoper-
ationandhowtooperatethemachinewithsafetytoacquireadequateknowledgeandoperationskill.To
ensuretheabove,theemployerhastoestablishaneducation/trainingplanfortheoperatorsandedu-
cate/trainthembeforehand.
Itemsforwhichthepowertothemachinehastobeturnedoff
Turningthepoweroff: Turningthepowerswitchoff,thenremovingthepowerplugfromtheoutlet.
Thisappliestothefollowing.
 1. Besuretoimmediatelyturnthepoweroffifanyabnormalityorfailureisfoundorinthecaseofpower
failureinordertoprotectagainstaccidentthatcanresultinpersonalinjuryordeath.
 2. Toprotectagainstaccidentresultingfromabruptstartofthemachine,besuretocarryoutthefollow-
ingoperationsafterturningthepoweroff.Forthemachineincorporatingaclutchmotor,inparticular,
besuretocarryoutthefollowingoperationsafterturningthepoweroffandverifyingthatthemachine
stopscompletely.
 2-1. Forexample,threadingthepartssuchastheneedle,looper,spreaderetc.whichhavetobethread-
ed,orchangingthebobbin.
 2-2. Forexample,changingoradjustingallcomponentpartsofthemachine.
 2-3. Forexample,wheninspecting,repairingorcleaningthemachineorleavingthemachine.
 3. Besuretoremovethepowerplugbyholdingtheplugsectioninsteadofthecordsectioninordertopre-
ventelectrical-shock,earth-leakageorreaccident.
 4. Besuretoturnthepoweroffwheneverthemachineisleftunattendedbetweenworks.
 5. Besuretoturnthepoweroffinthecaseofpowerfailureinordertopreventaccidentresultingofbreak-
ageofelectricalcomponents.

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PRECAUTIONSTOBETAKENINVARIOUSOPERATIONSTAGES
Transportation
 1. Besuretoliftandmovethemachineinasafemannertakingthemachineweightinconsideration.Refer
tothetextoftheinstructionmanualforthemassofthemachine.
 2. Besuretotakesufcientsafetymeasurestopreventfallingordroppingbeforeliftingormovingthe
machineinordertoprotectagainstaccidentthatcanresultinpersonalinjuryordeath.
 3. Oncethemachinehasbeenunpacked,neverre-packitfortransportationtoprotectthemachineagainst
breakageresultingfromunexpectedaccidentordropping.
Unpacking
 1. Besuretounpackthemachineintheprescribedorderinordertopreventaccidentthatcanresultin
personalinjuryordeath.Inthecasethemachineiscrated,inparticular,besuretocarefullychecknails.
Thenailshavetoberemoved.
 2. Besuretocheckthemachineforthepositionofitscenterofgravityandtakeitoutfromthepackage
carefullyinordertopreventaccidentthatcanresultinpersonalinjuryordeath.
Installation
(I)Tableandtablestand
 1. BesuretouseJUKIgenuinetableandtablestandinordertopreventaccidentthatcanresultinper-
sonalinjuryordeath.IfitisinevitabletouseatableandtablestandwhicharenotJUKIgenuineones,
selectthetableandtablestandwhichareabletosupportthemachineweightandreactionforceduring
operation.
 2. Ifcastersarettedtothetablestand,besuretousethecasterswithalockingmechanismandlock
themtosecurethemachineduringtheoperation,maintenance,inspectionandrepairinordertoprevent
accidentthatcanresultinpersonalinjuryordeath.
(II)Cableandwiring
 1. Besuretopreventanextraforcefrombeingappliedtothecableduringtheuseinordertoprevent
electrical-shock,earth-leakageorreaccident.Inaddition,ifitisnecessarytocableneartheoperating
sectionsuchastheV-belt,besuretoprovideaspaceof30mmormorebetweentheoperatingsection
andthecable.
 2. Besuretoavoidstarburstconnectioninordertopreventelectrical-shock,earth-leakageorreaccident.
 3. Besuretosecurelyconnecttheconnectorsinordertopreventelectrical-shock,earth-leakageorre
accident.Inaddition,besuretoremovetheconnectorwhileholdingitsconnectorsection.
(III)Grounding
 1. Besuretohaveanelectricalexpertinstallanappropriatepowerpluginordertopreventaccidentcaused
byearth-leakageordielectricstrengthvoltagefault.Inaddition,besuretoconnectthepowerplugtothe
groundedoutletwithoutexceptions.
 2. Besuretogroundtheearthcableinordertopreventaccidentcausedbyearthleakage.
(IV)Motor
 1. Besuretousethespeciedratedmotor(JUKIgenuineproduct)inordertopreventaccidentcausedby
burnout.
 2. Ifacommerciallyavailableclutchmotorisusedwiththemachine,besuretoselectonewithanentan-
glementpreventivepulleycoverinordertoprotectagainstbeingentangledbytheV-belt.
Beforeoperation
 1. Besuretomakesurethattheconnectorsandcablesarefreefromdamage,dropoutandloosenessbe-
foreturningthepoweroninordertopreventaccidentresultinginpersonalinjuryordeath.
 2. Neverputyourhandintothemovingsectionsofthemachineinordertopreventaccidentthatcanresult
inpersonalinjuryordeath.
  Inaddition,checktobesurethatthedirectionofrotationofthepulleyagreeswiththearrowshownon
pulley.
 3. Ifthetablestandwithcastersisused,besuretosecurethetablestandbylockingthecastersorwith
adjusters,ifprovided,inordertoprotectagainstaccidentcausedbyabruptstartofthemachine.
Duringoperation
 1. Besurenottoputyourngers,hairorclothingclosetothemovingsectionssuchasthehandwheel,
handpulleyandmotororplacesomethingnearthosesectionswhilethemachineisinoperationinorder
topreventaccidentcausedbyentanglementthatcanresultinpersonalinjuryordeath.
 2. Besurenottoplaceyourngersnearthesurroundareaoftheneedleorinsidethethreadtake-uplever
coverwhenturningthepoweronorwhilethemachineisinoperationinordertopreventaccidentthat
canresultinpersonalinjuryordeath.
 3. Themachinerunsatahighspeed.Neverbringyourhandsnearthemovingsectionssuchaslooper,
spreader,needlebar,hookandclothtrimmingknifeduringoperationinordertoprotectyourhands
againstinjury.Inaddition,besuretoturnthepoweroffandchecktobesurethatthemachinecomplete-
lystopsbeforechangingthethread.
 4. Becarefulnottoallowyourngersoranyotherpartsofyourbodytobecaughtbetweenthemachine
andtablewhenremovingthemachinefromorreplacingitonthetableinordertopreventaccidentthat
canresultinpersonalinjuryordeath.

iv
iv
5. Besuretoturnthepoweroffandchecktobesurethatthemachineandmotorcompletelystopbeforere-
movingthebeltcoverandV-beltinordertopreventaccidentcausedbyabruptstartofthemachineormotor.
 6. Ifaservomotorisusedwiththemachine,themotordoesnotproducenoisewhilethemachineisatrest.
Besurenottoforgettoturnthepoweroffinordertopreventaccidentcausedbyabruptstartofthemotor.
 7. Neverusethemachinewiththecoolingopeningofthemotorpowerboxshieldedinordertopreventre
accidentbyoverheat.
Lubrication
 1. BesuretouseJUKIgenuineoilandJUKIgenuinegreasetothepartstobelubricated.
 2. Iftheoiladheresonyoureyeorbody,besuretoimmediatelywashitoffinordertopreventinamma-
tionorirritation.
 3. Iftheoilisswallowedunintentionally,besuretoimmediatelyconsultamedicaldoctorinordertopre-
ventdiarrheaorvomiting.
Maintenance
 1. Inpreventionofaccidentcausedbyunfamiliaritywiththemachine,repairandadjustmenthastobe
carriedoutbyaservicetechnicianwhoisthoroughlyfamiliarwiththemachinewithinthescopedened
intheinstructionmanual.BesuretouseJUKIgenuinepartswhenreplacinganyofthemachineparts.
JUKIassumesnoresponsibilityforanyaccidentcausedbyimproperrepairoradjustmentortheuseof
anypartotherthanJUKIgenuineone.
 2. Inpreventionofaccidentcausedbyunfamiliaritywiththemachineorelectrical-shockaccident,besure
toaskanelectricaltechnicianofyourcompanyorJUKIordistributorinyourareaforrepairandmainte-
nance(includingwiring)ofelectricalcomponents.
 3. Whencarryingoutrepairormaintenanceofthemachinewhichusesair-drivenpartssuchasanaircyl-
inder,besuretoremovetheairsupplypipetoexpelairremaininginthemachinebeforehand,inorderto
preventaccidentcausedbyabruptstartoftheair-drivenparts.
 4. Besuretocheckthatscrewsandnutsarefreefromloosenessaftercompletionofrepair,adjustment
andpartreplacement.
 5. Besuretoperiodicallycleanupthemachineduringitsdurationofuse.Besuretoturnthepoweroff
andverifythatthemachineandmotorstopcompletelybeforecleaningthemachineinordertoprevent
accidentcausedbyabruptstartofthemachineormotor.
 6. Besuretoturnthepoweroffandverifythatthemachineandmotorstopcompletelybeforecarryingout
maintenance,inspectionorrepairofthemachine.(Forthemachinewithaclutchmotor,themotorwill
keeprunningforawhilebyinertiaevenafterturningthepoweroff.So,becareful.)
 7. Ifthemachinecannotbenormallyoperatedafterrepairoradjustment,immediatelystopoperationand
contactJUKIorthedistributorinyourareaforrepairinordertopreventaccidentthatcanresultinper-
sonalinjuryordeath.
 8. Ifthefusehasblown,besuretoturnthepoweroffandeliminatethecauseofblowingofthefuseand
replacetheblownfusewithanewoneinordertopreventaccidentthatcanresultinpersonalinjuryor
death.
 9. Besuretoperiodicallycleanuptheairventofthefanandinspecttheareaaroundthewiringinorderto
preventreaccidentofthemotor.
Operatingenvironment
 1. Besuretousethemachineundertheenvironmentwhichisnotaffectedbystrongnoisesource(electro-
magneticwaves)suchasahigh-frequencywelderinordertopreventaccidentcausedbymalfunctionof
themachine.
 2. Neveroperatethemachineinanyplacewherethevoltageuctuatesbymorethan"ratedvoltage±10%"
inordertopreventaccidentcausedbymalfunctionofthemachine.
 3. Besuretoverifythattheair-drivendevicesuchasanaircylinderoperatesatthespeciedairpressure
beforeusingitinordertopreventaccidentcausedbymalfunctionofthemachine.
 4. Tousethemachinewithsafety,besuretouseitundertheenvironmentwhichsatisesthefollowing
conditions:
  Ambienttemperatureduringoperation 5°Cto35°C
  Relativehumidityduringoperation 35%to85%
 5. Dewcondensationcanoccurifbringingthemachinesuddenlyfromacoldenvironmenttoawarmone.
So,besuretoturnthepoweronafterhavingwaitedforasufcientperiodoftimeuntilthereisnosign
ofwaterdropletinordertopreventaccidentcausedbybreakageormalfunctionoftheelectricalcompo-
nents.
 6. Besuretostopoperationwhenlightningashesforthesakeofsafetyandremovethepowerplugin
ordertopreventaccidentcausedbybreakageormalfunctionoftheelectricalcomponents.
 7. Dependingontheradiowavesignalcondition,themachinemaygeneratenoiseintheTVorradio.Ifthis
occurs,usetheTVorradiowithkeptwellawayfromthemachine.
 8. Inordertoensuretheworkenvironment,locallawsandregulationsinthecountrywherethesewing
machineisinstalledshallbefollowed.
Inthecasethenoisecontrolisnecessary,anearprotectororotherprotectivegearshouldbewornac-
cordingtotheapplicablelawsandregulations.
 9. Disposalofproductsandpackagesandtreatmentofusedlubricatingoilshouldbecarriedoutproperly
accordingtotherelevantlawsofthecountryinwhichthesewingmachineisused.

v
CAUTION BEFORE OPERATION
• BesuretolltheoilholewithoildesignatedbyJUKIbeforeuse.
• Cleanthesewingmachinethoroughlybeforeusingitforthersttime.
• Removealldustcollectedonthesewingmachineduringthetransportation.
• Conrmthatthevoltageandphasearecorrect.
• Conrmthatthepowerplugisproperlyconnected.
• Neverusethesewingmachineinthestatewherethevoltagetypeisdifferentfromthedesignatedone.
• Thedirectionofrotationofthesewingmachineisclockwiseasobservedfromthepulleyside.Becareful
nottorotateitinreversedirection.
• Whenoperatingthesewingmachine,turnONthepowerswitchafterproperlysettingtheheadonthetable.
• Fortherstmonthafterset-up,usethemachineatareducedsewingspeedof5,000sti/minorless.
(4,000sti/minorlessfortheMF-7900/UT59)
• Operatethepulleyafterthesewingmachinehastotallystopped.
WARNING :
Toavoidmalfunctionanddamageofthemachine,conrmthefollowing.
Precautionstobetakensoastouse
theMF-7900/UT59moresafely
 1. To prevent accidents caused by electric shock, never open the motor control box cover or
touchthecomponentsinsidethecontrolboxwhilethepowerswitchisON.
 1. Never bring your ngers under the needle whenthe power switch is turned ON or the ma-
chineisinoperation.
 2.Neverbringyourngers,hairorclothesclosetothepulleyandneedleorplaceanythingon
thepulleyandundertheneedlewhilethemachineisinoperation.
 3.Neveroperatethemachinewiththesafetydevicessuchasbeltcover,needlebarthreadtake-
upcover,ngerguard,eyeguardcover,etc.removed.
 4. Besuretoturn OFFthepowerandperform theworkafter ascertainingthatthesewingma-
chinedoesnotrunevenwhenthestartingpedalisdepressedincaseofchecking,adjusting,
cleaning,threadingorreplacingtheneedleofthesewingmachine.
 5. Neveroperatethesewingmachinewiththegroundwireforthepowersupplyremovedsoas
toensuresafety.
 6. BesuretoturnOFFthepowerswitchinadvanceincaseofinserting/removingthepowerplug.
 7. Intimeofthunderandlightning,stopyourworkanddisconnectthepowerplugfromthere-
ceptaclesoastoensuresafety.
 8. Whenyoumovethesewingmachinefromacoldplacedirectlytoawarmplace,dewconden-
sationmayresult.TurnONthepowertothemachineafteryouhaveconrmedthatthereisno
fearofdewcondensation.
 9. Incaseofmaintenance,inspection,orrepair,besuretoturnOFFthepowerswitchandcon-
firm that the sewing machine and the motor have completely stopped before starting the
work.(Incaseof the clutch motor,itcontinues rotating for a while bytheinertiaeven after
turningOFFthepowerswitch.So,becareful.)
 10. ThisInstructionManualistheInstructionManualforMF-7900/UT59.RefertotheInstructionMan-
ualfortheMF-7900(D)andUT57fortheoperatingprocedurewhichisnotincludedinthismanual.
 11. Thisproductisaprecisioninstrument,andbeverycarefulnottosplashwateroroilonit,or
giveashocktoitbydropping.
Inaddition,beawarethatthesafetydevicessuchasthe"eyeprotectioncover"and"ngerguard"aresome-
timesomittedinthesketches,illustrationsandguresincludedintheInstructionManualfortheexplanation's
sake.Inthepracticaluse,neverremovethosesafetydevices.
CAUTION