Yijing Electric YJHB-2 User manual

MANUAL
YJHB-2MicroRepairWelder
We appreciate that youhave chosenourYJHB-2Micro RepairWelder.Customer
satisfactionisourpriority. Westrive toprovidethemostefficientmachine,andagood
after-salesservice.
Kindlycontactus, if youneedanyassistanceinoperatingthemachine.We welcomeall
suggestionsthatcanimprovethemachineperformance.
Beforeusingthewelder,plsreadthroughthismanual,toenableyouasmoothstartanda
satisfactoryperformance.
ContactInformation:
YuyaoYijing Electric Co.,Ltd.
SimenWestIndustrialEstate,YuyaoCity,
315470,ZhejiangProvince,P.R.China
Tel: [phone]
Fax:[phone]
E-mail: [e-mail]
Website: http://www.chinayijing.com

Preface
WARNINGS
Misuseoftheweldermaycausedangertotheusers.Therefore,theequipmentwill beusedonlyin
compliancewithrelevantsafetyregulations. Specialattentionshouldbepaidtothefollowing:
ElectricShock:
-Weldingequipmentmustbeinstalledproperly.
-Isolateyourselffromthegroundandweldthetopic(eguseof footwearwithrubbersole).
-Ensurepropermaintenanceofweldingequipment.Neverworkwith damagedcablesorinsulation.
-Repairandmaintenanceoftheequipmentshall bemadebyapersonwiththenecessarytechnical
insight.
StrongArcLight:
-Protectyoureyes.Usethesuppliedweldingscreenorthelike,whichcanprotect youreyesfromthe
blazinglight.Evenabriefexposurecancausepermanentdamagetoeyesight.PlsBECAREFUL
-Protectyourbodyagainstthelightfromthearcwhiletheskincanbedamagedbyradiation. Use
protectiveclothingthatcoversallpartsofthebody.
-Ifpossible,shieldedthetotalworkingarea,toprotect othersfromthelightfromthearc;atleastwarn
them.
WeldingFumesandGas
-Smokeandgasesgeneratedbyweldingisdangeroustobreathe.Ensureappropriateexhaustand
ventilation.
Fire
-Radiationfromthearcandsparkscancausefires.Flammableobjectsareremovedfromthewelding
site.
-Workclothesshouldalsobeprotectedfromsparksandsplashesfromthearc.
Pleasereviewthismanualcarefullybeforeequipmentisinstalledandputintouse!

Page1
Generalintroduction
YJHB-2isamicro repairwelderwithTIG-likeweldingpulses. Theweldercangeneratevery
preciseweldingpulsetoproducefine-sizedand positionedweldingspots.
Themachinecanweldavarietyofmaterialsincl.all typesofsteelandiron,Aluminum,copper,
brass,bronze.
Itcanweldevenvery small detailswithvery thinfillers, andweldfastwiththickerfillers.
Althoughthemachineiseasy touse,itstill requiressomemanualdexterity.We recommendyou
usesometimetopractice, withsupportfromthetips inthismanual.
Technicaldata
1: ThemachinecanweldinFe,Cu,Al. Themachinecannotbeusedfor welding: Sn,Zn.
2: Themachinecanbeused:
•Repairofwornandfaultydetails intheformtoolfor pressurecasting,injectionmolding, blow
molding,etc..
•Defectsincastings,suchaspinhole,sandholesetc..
•Othersmall andprecisewelding tasksasanormalTIGweldercannotperform.
3: Electric Input: 220V,50Hz.
4: Powerconsumption10-1000W.
5:Maximuminstantoutputis 40kW.
6:Mode: •TIGpowermode1-4. Pulsepower(current): 1-99,Pulsetime(hours):1-99.
•SetFillermode:Pulsepower(current): 1-99,Fillerdiameterof0.1-1mm.
7:Pulsens frequency: 1Hz(mode4),2Hz(mode3), 3Hz(Mode2),5Hz(Mode1)
7:Machinedimensions: 380x150x220 mm.
8: Weight:9kg.
WeldingScreen
Theweldingscreeniscontrolledbytheweldermachineandcanshieldthearclight
simultaneously. Youneedtoinstall thescreenasshowninthepictureblowandplugitswireon
theback ofthemachine.
YoumustTESTthescreenbeforewelding.

Page2
FrontPanel
1:Modebuttons.
2: SetFillerModebutton
3: apulseorcontinuouslybypressing thefootpedalswitch.
4: Pulsecurrencydisplay andsetting.
5: Pulsetimedisplay andsetting.
6: On-Off.
7:Footpedalconnection.
8: TIGWelding torchconnections.
9: Groundcableconnections.
10: Set-Fillerwelding cableconnections.
1
2
3
4
5
6
7
8
9
10

Page3
TungstenTip
Intheweldingtorch,thereisamountedtip, whichismadeoftungsten.Thedesignofthetip
varies as theweldingtask changes. Plssee thefollowing pictures.
*NOTE:
1.Dull pinisthemoststableshapeoftungstenpin.We suggesttheuseofthisshapeasmuchas
possible.
2.Ifthedull pincannotfit,trythesharppin.
3. Theprotectglueisaspecial-madeheat-resistanceglue.Itcanprotectthetungstenpinand
prolong itsservicelife.
4. Theroundpinbestpreventpin-stuck.Itishighly recommendedfor welding ofaluminum,
copperandbrass.
5. Normally,weusepinsof 1.6mm.Ifrepairinglargeoutput,changethepinto 2.0mm, to
prolong itsservicelife.
Filler
We generallyrecommendthatyouusefillerofthesametypeastheworkpiecethatisweldedon.
For iron,werecommendfillerwithlowWc%.
Set FillerMode
Thisfunctionisaveryusefulaid,whenyouneedweldonverydelicate,complicatedpositions.
Youcanpre-weldthefillerwithsetfillermode,andthenyouusetheTIGmodetore-weldthe
fillerthoroughly ontotheposition.
Thisfunctioncanfree yourhandfromthetraditionaltiresomewayoffeedingthefillers. Youcan
stabletheTIGwelding torchby bothyourhands andgetmuchbetterweldingquality.
This functioncanalsobeusedtopreventpotentialdamagetosurroundingareas.
To useSet-FillerMode,youmustmakesure:
1)Thegroundcableis firmlyfastenedonthefrontpanel;
2)Thegroundplateis ingood contactwiththeworkpiece;
3)Theareatobeweldediscleanandfree ofstain,grease, etc..
Duringsettingfillers, youneedtopressdownhardonthefiller.Forfillerdia.of0.3mm,we
suggestpulsecurrencyvalue30.Forfillerdia. of1.0mm,wesuggestpulsecurrencyvalue99.

Page3
Weldingon Flat Surface
Theoreticallythearcisformedbetweenthetungstentipandtheworkpiece,whilethenearbyfiller
is meltanddrawntocoverthespot.
So itisimportantthatthetungstentipisinapreciseposition, anditshouldalwaysbeclosertothe
surfaceandfartherfromthefiller. Pls see thefollowing pictures.
MachineSettings:
Filler
DIA(mm) TIG MODE Pulse Currency
Pulse
Time V mm L mm
0.3 1 06 06 0.3 0.4
0.4 1 10 10 0.4 0.5
0.5 1 12 12 0.5 0.6
0.6 2 15 15 0.6 0.8
0.7 2 20 20 0.8 1.0
0.8 3 25 25 0.9 1.2
1.0 3 30 30 1.1 1.3
1.2 4 38 38 1.2 1.4
1.6 4 55 55 1.3 1.6

Page4
Welding multipleseams
Thepin-fillerdistanceshouldbeaboutthefillerdiameter.
Thefillershouldbeputtightlyagainsttheprivousseam.
SetFillerFunction:
To getanevenandflatwelded
surface,wecanpre-weldthe
fillers, asshownintheleft
picture.
Thereshouldbeadistanceabout
thefillerdiameter,betweentwo
neighboring fillers.
DuringTIGwelding,thefillers
will meltandfill thespot
betweentwoneighboring fillers.
Weldingon CornersandEdges
TheStartofaCorner
Weldingoncornersandedgesis
amoredifficulttaskthanto
weld onaflat. Themost
commonproblemisthatthereis
undercut(workpiecemoltmore
thanweldedon) atstartup.We
shallgiveafewguidelinesthat
canbeused.

Page5
TherestofaCorner
SetFillerFunction:
To getanmorestableweldingresult,we
suggestthatyouusetheSetFillerFunctionto
pre-weldthefillerpreciselyontopoftheedge
ofthecorner.
Henceyoucanfree yourhandfromstabilizing
thefillerandespeciallyhelpsifthespaceis
narrow.
MachineSettings:
Filler
DIA(mm) TIG MODE Pulse Currency Pulse Time L mm
0.3 1 03 8 0.4
0.4 1 05 11 0.5
0.5 2 08 13 0.6
0.6 2 10 15 0.8
0.7 2 14 20 1
0.8 2 18 25 1.2
1.0 2 22 30 1.3
WeldinginInteriorCorners
Whenweldingininterior corners, weneedtousesharptungstenpin.
Firstofall,weneedTIGweldwithoutanyfillers. Thisistopreparefor thenextsteps.Whenthe
interior corners isround, itismucheasytoweld.
Set-fillerFunctionis alsoveryusefulhere,especially whenthespaceislimited.
Usingset-filler,wecanskiptheTIG-weld-withou-any-filler-step.We directlypre-weldthefiller
intothecornerandthenTIGthefillerthoroughly
Plssee thepicturesnextpage.

MachineSettings:
Howmuchneedsto
berepaired(mm) TIG MODE Pulse Currency Pulse Time V mm
0.3MM 1 05 5 0.2
0.5MM 1 10 15 0.3
0.8MM 2 18 20 0.4
1.2MM 2 22 25 0.5
1.6MM 3 25 30 0.6
2.0MM 3 28 30 0.8