JUKI MEB-3900 User manual
MEB-3900
CAUTIONS FOR SAFETY
i
i
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 specications of your product.
The risk indications are classied 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•Thereisthepossibilitythatslighttoseriousinjuryordeathmaybecaused.
•Thereisthepossibilitythatinjurymaybecausedbytouchingmovingpart.
❷•Toperformsewingworkwithsafetyguard.
•Toperformsewingworkwithsafetycover.
•Toperformsewingworkwithsafetyprotectiondevice.
❸•BesuretoturnthepowerOFFbeforecarryingout"machine-headthreading",
"needlechanging","bobbinchanging"or"oilingandcleaning".
❸
❷
❶
Electrical-shock
dangerlabel
DANGER :
Thisindicationisgivenwherethereisanimmediatedangerofdeathorserousinjuryifthepersoninchargeoranythird
partymishandlesthemachineordoesnotavoidthedangeroussituationwhenoperatingormaintainingthemachine.
WARNING :
Thisindicationisgivenwherethereisapotentialityfordeathorseriousinjuryifthepersoninchargeoranythird
partymishandlesthemachineordoesnotavoidthedangeroussituationwhenoperatingormaintainingthemachine.
CAUTION :
Thisindicationisgivenwherethereisadangerofmediumtominorinjuryifthepersoninchargeoranythirdpar-
tymishandlesthemachineordoesnotavoidthedangeroussituationwhenoperatingormaintainingthemachine.
Itemsrequiringspecialattention.
Pictorialwarningindication
Thereisariskofinjuryifcontact-
ingamovingsection.
Pictorialwarning
indication
Beawarethatholdingthesewing
machineduringoperationcan
hurtyourhands.
Thereisariskofelectricalshockif
contactingahigh-voltagesection.
Thereisariskofentanglementin
thebeltresultingininjury.
Thereisariskofaburnifcontact-
ingahigh-temperaturesection.
Thereisariskofinjuryifyou
touchthebuttoncarrier.
Beawarethateyedeciencycan
becausedbylookingdirectlyatthe
laserbeam.
Indicationlabel
Thecorrectdirectionisindicated.
Thereisariskofcontactbetween
yourheadandthesewingma-
chine.
Connectionofaearthcableis
indicated.
TO ENSURE SAFE USE OF YOUR SEWING MACHINE
(I)Explanationofrisklevels
(II)
Explanationofpictorialwarningindicationsandwarninglabels
ii
ii
SAFETY PRECAUTIONS
1. Whenitisnecessarytoopenthecontrolboxcontainingelectricalparts,besuretoturnthepower
offandwaitforveminutesormorebeforeopeningthecoverinordertopreventaccidentleadingto
electricalshock.
Accidentmeans"tocause
personalinjuryordeathor
damagetoproperty."
DANGER
CAUTION
Basicprecaution
1. Besuretoreadtheinstructionmanualandotherexplanatorydocumentssuppliedwithaccessoriesof
themachinebeforeusingthemachine.Carefullykeeptheinstructionmanualandtheexplanatorydocu-
mentsathandforquickreference.
2. Thecontentofthissectionincludesitemswhicharenotcontainedinthespecicationsofyourproduct.
3. Besuretowearsafetygogglestoprotectagainstaccidentcausedbyneedlebreakage.
4. Thosewhouseaheartpacerhavetousethemachineafterconsultationwithamedicalspecialist.
Safetydevicesandwarninglabels
1. Besuretooperatethemachineafterverifyingthatsafetydevice(s)iscorrectlyinstalledinplaceand
worksnormallyinordertopreventaccidentcausedbylackofthedevice(s).
2. Ifanyofthesafetydevicesisremoved,besuretoreplaceitandverifythatitworksnormallyinorderto
preventaccidentthatcanresultinpersonalinjuryordeath.
3. Besuretokeepthewarninglabelsadheredonthemachineclearlyvisibleinordertopreventaccident
thatcanresultinpersonalinjuryordeath.Ifanyofthelabelshasstainedorcomeunstuck,besureto
changeitwithanewone.
Applicationandmodication
1. Neverusethemachineforanyapplicationotherthanitsintendedoneandinanymannerotherthanthat
prescribedintheinstructionmanualinordertopreventaccidentthatcanresultinpersonalinjuryor
death.JUKIassumesnoresponsibilityfordamagesorpersonalinjuryordeathresultingfromtheuseof
themachineforanyapplicationotherthantheintendedone.
2. Nevermodifyandalterthemachineinordertopreventaccidentthatcanresultinpersonalinjuryor
death.JUKIassumesnoresponsibilityfordamagesorpersonalinjuryordeathresultingfromthema-
chinewhichhasbeenmodiedoraltered.
Educationandtraining
1. Inordertopreventaccidentresultingfromunfamiliaritywiththemachine,themachinehastobeused
onlybytheoperatorwhohasbeentrained/educatedbytheemployerwithrespecttothemachineoper-
ationandhowtooperatethemachinewithsafetytoacquireadequateknowledgeandoperationskill.To
ensuretheabove,theemployerhastoestablishaneducation/trainingplanfortheoperatorsandedu-
cate/trainthembeforehand.
Itemsforwhichthepowertothemachinehastobeturnedoff
Turningthepoweroff: Turningthepowerswitchoff,thenremovingthepowerplugfromtheoutlet.
Thisappliestothefollowing.
1. Besuretoimmediatelyturnthepoweroffifanyabnormalityorfailureisfoundorinthecaseofpower
failureinordertoprotectagainstaccidentthatcanresultinpersonalinjuryordeath.
2. Toprotectagainstaccidentresultingfromabruptstartofthemachine,besuretocarryoutthefollow-
ingoperationsafterturningthepoweroff.Forthemachineincorporatingaclutchmotor,inparticular,
besuretocarryoutthefollowingoperationsafterturningthepoweroffandverifyingthatthemachine
stopscompletely.
2-1. Forexample,threadingthepartssuchastheneedle,looper,spreaderetc.whichhavetobethread-
ed,orchangingthebobbin.
2-2. Forexample,changingoradjustingallcomponentpartsofthemachine.
2-3. Forexample,wheninspecting,repairingorcleaningthemachineorleavingthemachine.
3. Besuretoremovethepowerplugbyholdingtheplugsectioninsteadofthecordsectioninordertopre-
ventelectrical-shock,earth-leakageorreaccident.
4. Besuretoturnthepoweroffwheneverthemachineisleftunattendedbetweenworks.
5. Besuretoturnthepoweroffinthecaseofpowerfailureinordertopreventaccidentresultingofbreak-
ageofelectricalcomponents.
iii
iii
PRECAUTIONSTOBETAKENINVARIOUSOPERATIONSTAGES
Transportation
1. Besuretoliftandmovethemachineinasafemannertakingthemachineweightinconsideration.Refer
tothetextoftheinstructionmanualforthemassofthemachine.
2. Besuretotakesufcientsafetymeasurestopreventfallingordroppingbeforeliftingormovingthe
machineinordertoprotectagainstaccidentthatcanresultinpersonalinjuryordeath.
3. Oncethemachinehasbeenunpacked,neverre-packitfortransportationtoprotectthemachineagainst
breakageresultingfromunexpectedaccidentordropping.
Unpacking
1. Besuretounpackthemachineintheprescribedorderinordertopreventaccidentthatcanresultin
personalinjuryordeath.Inthecasethemachineiscrated,inparticular,besuretocarefullychecknails.
Thenailshavetoberemoved.
2. Besuretocheckthemachineforthepositionofitscenterofgravityandtakeitoutfromthepackage
carefullyinordertopreventaccidentthatcanresultinpersonalinjuryordeath.
Installation
(I)Tableandtablestand
1. BesuretouseJUKIgenuinetableandtablestandinordertopreventaccidentthatcanresultinper-
sonalinjuryordeath.IfitisinevitabletouseatableandtablestandwhicharenotJUKIgenuineones,
selectthetableandtablestandwhichareabletosupportthemachineweightandreactionforceduring
operation.
2. Ifcastersarettedtothetablestand,besuretousethecasterswithalockingmechanismandlock
themtosecurethemachineduringtheoperation,maintenance,inspectionandrepairinordertoprevent
accidentthatcanresultinpersonalinjuryordeath.
(II)Cableandwiring
1. Besuretopreventanextraforcefrombeingappliedtothecableduringtheuseinordertoprevent
electrical-shock,earth-leakageorreaccident.Inaddition,ifitisnecessarytocableneartheoperating
sectionsuchastheV-belt,besuretoprovideaspaceof30mmormorebetweentheoperatingsection
andthecable.
2. Besuretoavoidstarburstconnectioninordertopreventelectrical-shock,earth-leakageorreaccident.
3. Besuretosecurelyconnecttheconnectorsinordertopreventelectrical-shock,earth-leakageorre
accident.Inaddition,besuretoremovetheconnectorwhileholdingitsconnectorsection.
(III)Grounding
1. Besuretohaveanelectricalexpertinstallanappropriatepowerpluginordertopreventaccidentcaused
byearth-leakageordielectricstrengthvoltagefault.Inaddition,besuretoconnectthepowerplugtothe
groundedoutletwithoutexceptions.
2. Besuretogroundtheearthcableinordertopreventaccidentcausedbyearthleakage.
(IV)Motor
1. Besuretousethespeciedratedmotor(JUKIgenuineproduct)inordertopreventaccidentcausedby
burnout.
2. Ifacommerciallyavailableclutchmotorisusedwiththemachine,besuretoselectonewithanentan-
glementpreventivepulleycoverinordertoprotectagainstbeingentangledbytheV-belt.
Beforeoperation
1. Besuretomakesurethattheconnectorsandcablesarefreefromdamage,dropoutandloosenessbe-
foreturningthepoweroninordertopreventaccidentresultinginpersonalinjuryordeath.
2. Neverputyourhandintothemovingsectionsofthemachineinordertopreventaccidentthatcanresult
inpersonalinjuryordeath.
Inaddition,checktobesurethatthedirectionofrotationofthepulleyagreeswiththearrowshownon
pulley.
3. Ifthetablestandwithcastersisused,besuretosecurethetablestandbylockingthecastersorwith
adjusters,ifprovided,inordertoprotectagainstaccidentcausedbyabruptstartofthemachine.
Duringoperation
1. Besurenottoputyourngers,hairorclothingclosetothemovingsectionssuchasthehandwheel,
handpulleyandmotororplacesomethingnearthosesectionswhilethemachineisinoperationinorder
topreventaccidentcausedbyentanglementthatcanresultinpersonalinjuryordeath.
2. Besurenottoplaceyourngersnearthesurroundareaoftheneedleorinsidethethreadtake-uplever
coverwhenturningthepoweronorwhilethemachineisinoperationinordertopreventaccidentthat
canresultinpersonalinjuryordeath.
3. Themachinerunsatahighspeed.Neverbringyourhandsnearthemovingsectionssuchaslooper,
spreader,needlebar,hookandclothtrimmingknifeduringoperationinordertoprotectyourhands
againstinjury.Inaddition,besuretoturnthepoweroffandchecktobesurethatthemachinecomplete-
lystopsbeforechangingthethread.
4. Becarefulnottoallowyourngersoranyotherpartsofyourbodytobecaughtbetweenthemachine
andtablewhenremovingthemachinefromorreplacingitonthetableinordertopreventaccidentthat
canresultinpersonalinjuryordeath.
iv
iv
5. Besuretoturnthepoweroffandchecktobesurethatthemachineandmotorcompletelystopbeforere-
movingthebeltcoverandV-beltinordertopreventaccidentcausedbyabruptstartofthemachineormotor.
6. Ifaservomotorisusedwiththemachine,themotordoesnotproducenoisewhilethemachineisatrest.
Besurenottoforgettoturnthepoweroffinordertopreventaccidentcausedbyabruptstartofthemotor.
7. Neverusethemachinewiththecoolingopeningofthemotorpowerboxshieldedinordertopreventre
accidentbyoverheat.
Lubrication
1. BesuretouseJUKIgenuineoilandJUKIgenuinegreasetothepartstobelubricated.
2. Iftheoiladheresonyoureyeorbody,besuretoimmediatelywashitoffinordertopreventinamma-
tionorirritation.
3. Iftheoilisswallowedunintentionally,besuretoimmediatelyconsultamedicaldoctorinordertopre-
ventdiarrheaorvomiting.
Maintenance
1. Inpreventionofaccidentcausedbyunfamiliaritywiththemachine,repairandadjustmenthastobe
carriedoutbyaservicetechnicianwhoisthoroughlyfamiliarwiththemachinewithinthescopedened
intheinstructionmanual.BesuretouseJUKIgenuinepartswhenreplacinganyofthemachineparts.
JUKIassumesnoresponsibilityforanyaccidentcausedbyimproperrepairoradjustmentortheuseof
anypartotherthanJUKIgenuineone.
2. Inpreventionofaccidentcausedbyunfamiliaritywiththemachineorelectrical-shockaccident,besure
toaskanelectricaltechnicianofyourcompanyorJUKIordistributorinyourareaforrepairandmainte-
nance(includingwiring)ofelectricalcomponents.
3. Whencarryingoutrepairormaintenanceofthemachinewhichusesair-drivenpartssuchasanaircyl-
inder,besuretoremovetheairsupplypipetoexpelairremaininginthemachinebeforehand,inorderto
preventaccidentcausedbyabruptstartoftheair-drivenparts.
4. Besuretocheckthatscrewsandnutsarefreefromloosenessaftercompletionofrepair,adjustment
andpartreplacement.
5. Besuretoperiodicallycleanupthemachineduringitsdurationofuse.Besuretoturnthepoweroff
andverifythatthemachineandmotorstopcompletelybeforecleaningthemachineinordertoprevent
accidentcausedbyabruptstartofthemachineormotor.
6. Besuretoturnthepoweroffandverifythatthemachineandmotorstopcompletelybeforecarryingout
maintenance,inspectionorrepairofthemachine.(Forthemachinewithaclutchmotor,themotorwill
keeprunningforawhilebyinertiaevenafterturningthepoweroff.So,becareful.)
7. Ifthemachinecannotbenormallyoperatedafterrepairoradjustment,immediatelystopoperationand
contactJUKIorthedistributorinyourareaforrepairinordertopreventaccidentthatcanresultinper-
sonalinjuryordeath.
8. Ifthefusehasblown,besuretoturnthepoweroffandeliminatethecauseofblowingofthefuseand
replacetheblownfusewithanewoneinordertopreventaccidentthatcanresultinpersonalinjuryor
death.
9. Besuretoperiodicallycleanuptheairventofthefanandinspecttheareaaroundthewiringinorderto
preventreaccidentofthemotor.
Operatingenvironment
1. Besuretousethemachineundertheenvironmentwhichisnotaffectedbystrongnoisesource(electro-
magneticwaves)suchasahigh-frequencywelderinordertopreventaccidentcausedbymalfunctionof
themachine.
2. Neveroperatethemachineinanyplacewherethevoltageuctuatesbymorethan"ratedvoltage±10%"
inordertopreventaccidentcausedbymalfunctionofthemachine.
3. Besuretoverifythattheair-drivendevicesuchasanaircylinderoperatesatthespeciedairpressure
beforeusingitinordertopreventaccidentcausedbymalfunctionofthemachine.
4. Tousethemachinewithsafety,besuretouseitundertheenvironmentwhichsatisesthefollowing
conditions:
Ambienttemperatureduringoperation 5°Cto35°C
Relativehumidityduringoperation 35%to85%
5. Dewcondensationcanoccurifbringingthemachinesuddenlyfromacoldenvironmenttoawarmone.
So,besuretoturnthepoweronafterhavingwaitedforasufcientperiodoftimeuntilthereisnosign
ofwaterdropletinordertopreventaccidentcausedbybreakageormalfunctionoftheelectricalcompo-
nents.
6. Besuretostopoperationwhenlightningashesforthesakeofsafetyandremovethepowerplugin
ordertopreventaccidentcausedbybreakageormalfunctionoftheelectricalcomponents.
7. Dependingontheradiowavesignalcondition,themachinemaygeneratenoiseintheTVorradio.Ifthis
occurs,usetheTVorradiowithkeptwellawayfromthemachine.
8. Inordertoensuretheworkenvironment,locallawsandregulationsinthecountrywherethesewing
machineisinstalledshallbefollowed.
Inthecasethenoisecontrolisnecessary,anearprotectororotherprotectivegearshouldbewornac-
cordingtotheapplicablelawsandregulations.
9. Disposalofproductsandpackagesandtreatmentofusedlubricatingoilshouldbecarriedoutproperly
accordingtotherelevantlawsofthecountryinwhichthesewingmachineisused.
v
1. To prevent accidents caused by electric shock, never open the control box cover or
touch the components inside the control box while the power switch is ON.
2. Do not lift the sewing machine for any purpose other than for installation, repair or ad-
justment in order to prevent accidents resulting in personal injuries due to pinching. In
addition, the sewing machine has to be lifted for repair or adjustment only by a mainte-
nance technician who is familiar with the machine.
3.Ifyoundthe sewingmachineistoo heavytolift, thegasspringmay havemalfunc-
tioned due to outgassing.
Never lift the sewing machine in such a state since the machine can drop to pinch
hands,ngersandarmsresultinginseriousinjury.
4. Do not raise/return the sewing machine from/to its home position with two or more
workers in order to prevent an accident that can result in personal injury.
5. Do not hold the sewing machine in its raised position by hand in order to prevent an
accident that can result in personal injury.
*Besuretolockthehingestopperwhenraisingthesewingmachinetormlysecurethe
machine in its raised position.
6. Do not hold any part of the sewing machine other than the rib on the bed periphery on
the near side in order to prevent an accident that can result in personal injury.
7. Do not use the sewing machine when the gas spring is not installed, in order to prevent
an accident that can result in personal injury.
8. The cloth trimming knife trims the material with an extremely strong pressure.
Never allow hands and ngers to move near the cloth trimming knife when the cloth
trimming hammer is in operation in order to prevent a pinching accident that can result
in personal injury.
9. To prevent an accident causing electrical shock, turn the power off and stop using the
sewing machine if the power cord and/or motor cord conductors are exposed.
10.To prevent an accident causing electrical shock, be sure to turn the power off in prior in
the case it is necessary to open the power switch.
1. Toavoidpersonalinjuries,neveroperatethemachinewithanyofthebeltcover,nger
guard, eye guard or safety devices removed.
2. Toavoidpersonalinjuries,neverbringyourngersnearneedle,clothcuttingknifeand
bobbin thread cutting knife when turning ON the power or during operating the sewing
machine.
3. Toavoidpersonalinjuries,neverbringyourngersintotheneedlebarcoverwhilethe
machine is running.
4. To avoid personal injuries and prevent the breakdown of the sewing machine, make
sure that there is no person or thing around the sewing machine when raising the
machine head.
1. To avoid personal injuries, when returning the machine head from the raised state to
thehomeposition,returnittothehomepositionafterconrmingthatthereisnotool
or component under the gas spring.
2. To avoid personal injuries or damage of the sewing machine, take care not to allow the
tool or components to damage the rod section of gas spring in the bottom cover.
3. To avoid personal injuries, immediately replace the gas spring with a new one when
therodsectionofgasspringdoesnotfunctionproperlywithaaworthelike,oritis
judged as a defective one. For the judgment standard of defectiveness, refer to the item
of "Standard of replacing time of the gas spring". [Do not use anything other than JUKI
genuine gas spring (Part No. : 40100390).]
4. To protect against personal injury and sewing machine breakage, keep hair, accesso-
ries, etc. away from the thread take-up lever of the sewing machine during sewing since
they can be entangled in the lever.
DANGER
WARN-
ING
CAU-
TION
PRECAUTIONS TO BE TAKEN SO AS TO USE THE MEB-3900
MORE SAFELY
vi
CAU-
TION
1. Never operate the sewing machine unless the machine head has been lubricated.
2. Remove dust gathered in the respective sections of the sewing machine when the work is over.
3. Connect the power suitable for the voltage and phase of the sewing machine.
4. The standard patterns are prepared beforehand in the pattern Nos. 88 to 99. Sewing speed and
thread tension can be changed, however, shape cannot be changed. When changing the shape,
copy the shape in another pattern No. to change.
5. Temperature in the control box is constantly monitored to run/stop the cooling fan according to
the changes in temperature.
It is therefore necessary to periodically inspect the ventilation hole and the area surrounding the
wiring.
6. Do not operate the sewing machine with the materials to be sewn stacked on your lap. The
materials can be pinched between the feed base and the bed, resulting in the sewing machine
seizure.
7. Do not operate the cloth cutting knife without the knife guard installed since the knife arm and
the oscillating shaft can interfere to cause breakage.
CAUTIONS IN OPERATION
5. To avoid personal injuries, do not use the sewing machine with the gas spring removed.
6. To prevent accidents caused by abrupt start of the sewing machine, turn OFF the power
switch when the machine is tilted or covers are removed.
7. The motor does not produce the noise while the machine is stopped. To prevent
accidents caused by abrupt start of the sewing machine, be sure to turn OFF the power
switch when you stop the machine.
8. To prevent accidents caused by electric shock, do not operate the machine with the
ground wire removed.
9. To prevent accidents caused by electric shock and damage of the electrical
components, turn OFF the power switch in advance in case of inserting or removing
the connectors or the power plug.
10. Be careful of handling this product so as not to pour water or oil, shock by dropping,
and the like since this product is a precision instrument.
11. Toprotectagainstpersonalinjury,keephandsandngersawayfromtheworkclamp
while it is in operation.
12. Toprotectagainstpersonalinjury,keephandsandngersawayfromthethreaddrawer
and thread take-up lever while the sewing machine is in operation.
13. To protect against personal injury and sewing machine breakage, do not place hands
in the opening section in the front face of the bed while the sewing machine is in
operation.
14. High-pressure air is exhausted from the solenoid valve. To prevent an unexpected
accident, keep away from the exhaust port of the solenoid valve while the sewing
machine is in operation.
15. To prevent diminished vision, do not directly look into the LED lamp.
16. In order to prevent personal injury, be sure to close the front cover before staring the
sewing machine and while the sewing machine is in operation.
17. In a domestic environment this product may cause radio interference, in which case the
user may be required to make corrective actions.
vii
Inaddition,beawarethatthesafetydevicessuchasthe"eyeprotectioncover"and"ngerguard"aresometimes
omittedinthesketches,illustrationsandguresincludedintheInstructionManualfortheexplanation'ssake.
In the practical use, never remove those safety devices.
CAUTION
Warning label
(Refer
to the
warn-
ing la-
bel on
page i.)
The label gives the
minimum precau-
tions to be taken
when operating the
sewing machine.
Needle bar cover
This is a cover for
preventing con-
tact between the
human body and
the needle bar.
Temporary stop switch
Press this switch to stop
the sewing machine
when you need to stop it
while it is in operation.
Eye protection cover
This is a cover for protect-
ing eyes from being in-
jured by a broken needle.
Finger guard
This is a cover for pre-
venting contact between
ngersandtheneedle.
Power switch
This switch is used for dis-
connecting the power unit of
the sewing machine from the
power supply. It is also used as
the emergency stop switch.
Electri-
cal-shock
danger
label (Refer to
"Electri-
cal-shock
danger
label" on
page i.)
(EU
type)
In order
to protect
against elec-
trical shock,
safety pre-
cautions to
be taken to
avoid danger
are written
on this label.
Turning gear cover
Cover to prevent
human body from
coming in contact
with turning gear.
SAFETY DEVICES AND WARNING LABELS
Warning label
against pinching
This is the warning
label to prevent
pinching of hands
between the bed
and the sewing
machine when re-
turning the latter to
its home position.
Looper cam cover
This cover prevents pinch-
ingofngersorhandsinthe
moving part of the looper
mechanism while the sewing
machine is in operation.
Front cover
This cover is provided
for preventing contact
between the human
body and the looper
driving mechanism.
Warning label against
pinching
This is the caution label
for preventing pinching of
ngersandhandsbetween
the looper mechanism
located inside the opening
in front of the bed and
the bed while the sewing
machine is in operation.
Warning label against
pinching
This is the caution label
to prevent pinching of
ngersandhandsin
the feed base while the
sewing machine is in op-
eration. (Two locations
on the right and left)
Gas spring
This is the part for reducing the sewing ma-
chine weight to ensure safety when raising/
returning the sewing machine from/to its home
position.
The sewing machine is very heavy. Raising the
sewing machine when the gas spring is not
functioning can pose a risk of personal injury.
* Carefully read the description given in IN-
STRUCTION MANUAL for MEB-3900 "10-14.
(6) Standard of replacing time of the gas
spring" and "10-14. (7) Replacing the gas
spring" before using the sewing machine.
viii
Hinge stopper
This part is used when raising the sewing
machine for its installation, repair or adjust-
ment, and is used for locking the sewing
machine in its raised position so as to
prevent the sewing machine drop accident
resulting in personal injury.
In addition, the part is also used as a stop-
per for holding the sewing machine in its
intermediate position so as to protect the
operator against being pinched by the ma-
chine accidentally when returning the raised
sewing machine to its home position.
Warning label
against pinching
This is the warning label
to prevent pinching of
ngersandhandsinthe
cloth trimming knife.
Holding prohibition label
This is the warning
label to indicate the part
which should not be
held by hand when rais-
ing the sewing machine
from its home position.
(Two locations on the
right and left)
Warning
label against
pinching
This is the
warning label
to prevent
pinching of
fingers and
hands in the
hinge stopper.
Sewing machine up/down
lock
This is the part for locking
the sewing machine in order
to prevent the machine from
being lifted carelessly except
in the case of installation,
repair or adjustment, thereby
protecting against the sew-
ing machine drop accident.
Warning label against
pinching
This is the caution label
for preventing pinching
ofngersandhands
between the thread
take-up lever and the
thread drawer while the
sewing machine is in
operation.
Warning label against
pinching
This is the caution
label for preventing
pinchingofngersor
hands in the moving
part of the looper
bracket mechanism
while sewing machine
is in operation.
Warning
label against
pinching
This is the
warning
label to
prevent
pinching
ofngers
and hands
in the hinge
stopper.
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