Kemppi FE20 - 4 Operation Disturbances

EN
4. OPERATION DISTURBANCES
Welding performance can be eected by a number of issues, including the welding gun and/
or other parts of the welding system. The following information will help you to check, identify
and rectify possible causes of welding malfunction.
NOTE! The problems listed and the possible causes are not denitive, but serve to suggest some
standard and typical situations that may present during normal use when using the MIG/MAG
process.
Dirty, poor quality weld?
• Checkthatspatterisnotblockingthenozzleorcontacttipadapter
• Checkshieldinggassupply
• Checkandsetgasowrate
• Checkgastypeforapplication
• Checkgunpolarity.Example:Fesolidllerwire:Earthreturnsocketshouldbeconnectedtothe-pole,wirefeed/Gun
connectiontothe+pole
• Checkpowersupply–Phasedown?
Variable welding performance?
• Checkwirefeedmechanismiscorrectlyadjusted
• Checkcorrectdriverollsaretted
• Checkwirespool/huboverruntensioniscorrectlyadjusted
• Checkgunlinerisnotblocked.Replaceifnecessary
• Checkcorrectgunlineristtedforthellerwiresizeandtype
• Checkcontacttipforsize,typeandwear
• Checkgunisnotoverheatingfortheapplication
• Checkcableconnectionsandearthreturnclamp
• Checkweldingparametersettings.
Filler wire won’t feed?
• Checkwirefeedmechanism.Adjustasnecessary
• Checkweldinggunswitchfunction.
• Checkeurogunconnectoriscorrectlytted
• Checkgunlinerisnotblocked
• Checkcontacttip,size,type,wear
• Checkllerwirediameterforcorrectsize
High spatter volume?
• Checkweldingparametervalues
• Checkinductance/Dynamicsvalues
• Checkgastypeandow
• Checkweldingpolarityandcableconnections
• Checkllermaterialselection
• Checkllerwiredeliverysystem
• Checkpowersupply.Areallelectricalphasespresent?
• Checkthatoperatormaintainscorrecttechnique/Arclength/travelspeed/Gunangle
NOTE! Many of these checks may be carried out by the operator. However certain checks relating to
mains power must be completed by an authorised trained electrician.
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