Jasic MIG SERIES - MIG Welding Problems; MIG Welding Defects and Prevention

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MIG WELDING PROBLEMS
Before starng any welding acvity ensure that you have suitable eye protecon and
protecve clothing. Also take the necessary steps to protect any persons within the welding
area.
MIG welding defects and prevenon methods
Defect Possible cause Acon
Porosity (within or outside the bead) Poor material
Insucient shield gas ow
Gas ow too low/high
Leaking hoses
Faulty gas valve
Working in open area with dras
Check the material is clean
Check hoses and MIG torch for blockages
Check the regulator seng or that it is not frozen
due to a high ow
Check all hoses for leaks
Call a service engineer
Put screens up around the weld area
Poor or inconsistent wire feed Incorrect pressure on wire drive
causing burn back to contact p or
bird nesng at the feed roll
Damage to torch liner
Welding wire contaminated or rusty
Worn welding p
Readjust the upper feed pressure
Increase the pressure to eliminate burn back to
p
Decrease pressure to eliminate bird nesng
Replace torch liner
Replace wire
Check and replace welding p
No operaon when the torch switch
is operated
Torch switch faulty
Fuse blown
Faulty PCB inside the equipment
Check the torch switch connuity and replace if
faulty
Check fuses and replace if necessary
Call a service engineer
Low output current Loose or defecve work clamp
Loose cable plug
Power source faulty
Tighten/replace clamp
Re-x plug
Call a service engineer
No operaon No operaon and mains lamp not lit
Faulty power source
Check mains fuse and replace if required
Call a service engineer
Excessive spaer Wire feed speed too high or
welding voltage too low
Reset the parameters according to the weld
to be made
Excessive penetraon, the weld
metal is below the surface level of
the material and hangs below
Heat input too high
Poor weld technique
Reduce the amperage or use a smaller electrode
and lower amperage
Use correct welding travel speed