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7: HF present but no welding power
0/33)",%2%!3/.
35''%34%$2%-%$9
Incomplete welding circuit
#ONlRMTHATTHEGROUNDCLAMPISCONNECTED#HECKALLCABLECONNECTIONS#HECKTHATTHEPOWERCABLEIS
NOTSEPARATED
No gas
#HECKTHEGASISCONNECTEDANDCYLINDERVALVEOPENCHECKHOSESGASVALVEANDTORCHARENOTRESTRICTED
3ETTHEGASmOWBETWEENn#&(n,-. mOWRATE
Tungsten melting into the weld pool
#HECKTHATCORRECTTYPEOFTUNGSTENISBEINGUSED4OOMUCHCURRENTFORTHETUNGSTENSIZESOREDUCE
THEAMPSORCHANGETOALARGERTUNGSTEN
8: Arc wanders during DC welding
0/33)",%2%!3/.
35''%34%$2%-%$9
Poor gas flow
#HECKANDSETTHEGASmOWBETWEENn#&(n,-. mOWRATE
Incorrect arc length
,OWERTORCHSOTHATTHETUNGSTENISOFFOFTHEWORKPIECEnn MM
Tungsten incorrect or in poor condition
#HECKTHATCORRECTTYPEOFTUNGSTENISBEINGUSED2EMOVEMM FROMTHEWELDENDOFTHE
TUNGSTENANDRESHARPENTHETUNGSTEN
Poorly prepared tungsten
'RINDMARKSSHOULDRUNLENGTHWISEWITHTUNGSTENNOTCIRCULAR5SEPROPERGRINDINGMETHODANDWHEEL
Contaminated base metal
2EMOVECONTAMINATINGMATERIALSLIKEPAINTGREASEOILANDDIRTINCLUDINGMILLSCALEFROMBASEMETAL
Contaminated filler wire
2EMOVEALLGREASEOILORMOISTUREFROMlLLERMETAL
Incorrect filler wire
#HECKTHElLLERWIREANDCHANGEIFNECESSARY
9: Arc wanders during AC welding
0/33)",%2%!3/.
35''%34%$2%-%$9
Inadequate gas flow
3ETTHEGASmOWBETWEENn#&(n,-. mOWRATE
Incorrect arc length
3ETTHETORCHSOTHATTHETUNGSTENISOFFOFTHEWORKPIECEnn MM
Tungsten is contaminated
2EMOVEMM OFCONTAMINATEDTUNGSTENANDREGRINDTHETUNGSTEN5SEAPOINTEDTUNGSTENWITH
!#SQUAREWAVEINVERTERMACHINES4HEPOINTWILLROUNDOFFAFTERWELDING
Incorrect tungsten size and or tungsten
being used
#HECKANDCHANGETHESIZEANDORTHETUNGSTENIFREQUIRED
Excessive rectification in the base metal
)NCREASEBALANCECONTROL)NCREASETRAVELSPEED!DDlLLERWIREDURINGWELDING
Contaminated base metal
2EMOVECONTAMINATINGMATERIALSLIKEPAINTGREASEOILANDDIRTINCLUDINGMILLSCALEFROMBASEMETAL
10: Arc difficult to start or will not start DC welding
0/33)",%2%!3/.
35''%34%$2%-%$9
Incorrect machine set up
#HECKMACHINESETUPISCORRECT
No gas, incorrect gas flow
#HECKTHEGASISCONNECTEDANDCYLINDERVALVEOPENCHECKHOSESGASVALVEANDTORCHARENOTRESTRICTED
3ETTHEGASmOWBETWEENn#&(n,-. mOWRATE
Tungsten is contaminated
2EMOVEMM OFCONTAMINATEDTUNGSTENANDREGRINDTHETUNGSTEN
Incorrect tungsten size and or tungsten
being used
#HECKANDCHANGETHESIZEANDORTHETUNGSTENIFREQUIRED
Loose connection
#HECKALLCONNECTORSANDTIGHTEN
Ground clamp not connected to work
#ONNECTTHEGROUNDCLAMPDIRECTLYTOTHEWORKPIECEWHEREVERPOSSIBLE
Loss of high frequency
#HECKTORCHANDCABLESFORCRACKEDINSULATIONORBADCONNECTIONS
11: Arc difficult to start or will not start AC welding
0/33)",%2%!3/.
35''%34%$2%-%$9
Incorrect machine set up
#HECKMACHINESETUPISCORRECT
No gas, incorrect gas flow
#HECKTHEGASISCONNECTEDANDCYLINDERVALVEOPENCHECKHOSESGASVALVEANDTORCHARENOTRESTRICTED
3ETTHEGASmOWBETWEENn#&(n,-. mOWRATE
Incorrect tungsten size and or tungsten
being used
#HECKANDCHANGETHESIZEANDORTHETUNGSTENIFREQUIRED
Tungsten is contaminated
2EMOVEMM OFCONTAMINATEDTUNGSTENANDREGRINDTHETUNGSTEN5SEAPOINTEDTUNGSTENWITH
!#SQUAREWAVEINVERTERMACHINES4HEPOINTWILLROUNDOFFAFTERWELDING
Loose connection
#HECKALLCONNECTORSANDTIGHTEN
Ground clamp not connected to work
#ONNECTTHE'ROUNDCLAMPDIRECTLYTOTHEWORKPIECEWHEREVERPOSSIBLE
Loss of high frequency
#HECKTORCHANDCABLESFORCRACKEDINSULATIONORBADCONNECTIONS
GTAW (TIG) WELDING TROUBLESHOOTING
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