H&S HSM250 - §6.2 MIG Wire Feed - Trouble Shooting

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5
Excessive
Penetration −
weld metal
melting
through base
metal
Too much heat
Select a lower voltage range
and /or adjust the wire speed
to suit Increase travel speed
6
Lack of
Penetration −
shallow fusion
between weld
metal and base
metal
Poor in incorrect joint
preparation
Material too thick. Joint
preparation and design needs
to allow access to bottom of
groove while maintaining
proper welding wire extension
and arc characteristics. Keep
the arc at the leading edge of
the weld pool and maintain the
gun angle at 5 & 15° keeping
the stick out between 5-10mm
Not enough heat input
Select a higher voltage range
and /or adjust the wire speed
to suit reduce travel speed.
Contaminated base metal
Remove materials like paint,
grease, oil, and dirt, including
mill scale from base metal
§6.2 MIG Wire Feed - Trouble Shooting
The following chart addresses some of the common WIRE FEED problems during MIG
welding. In all cases of equipment malfunction, the manufacturer’s recommendations
should be strictly adhered to and followed.
NO.
Trouble
Possible Reason
Suggested Remedy
1
No wire
feed
Wrong mode selected
Check that the TIG/MMA/MIG
selector switch set to MIG position