Operation Disturbances - Kemppi FE20 Operating Manual

4.

OPERATION DISTURBANCES

Welding performance can be effected 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.
The problems listed and the possible causes are not definitive, but serve to suggest some
NOTE!
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 flow rate
• Check gas type for application
• Check gun polarity. Example: Fe solid filler 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 fitted
• Check wire spool/hub overrun tension is correctly adjusted
• Check gun liner is not blocked. Replace if necessary
• Check correct gun liner is fitted for the filler 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 fitted
• Check gun liner is not blocked
• Check contact tip, size, type, wear
• Check filler wire diameter for correct size
High spatter volume?
• Check welding parameter values
• Check inductance/Dynamics values
• Check gas type and flow
• Check welding polarity and cable connections
• Check filler material selection
• Check filler wire delivery system
• Check power supply. Are all electrical phases present?
• Check that operator maintains correct technique/Arc length/travel speed/Gun angle
Many of these checks may be carried out by the operator. However certain checks relating to
NOTE!
mains power must be completed by an authorised trained electrician.
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