Poor wirefeed
Cause:
The inner liner has been cut too short
Remedy:
Replace the inner liner and cut it to the correct length
Cause:
Wire electrode worn due to heavy contact pressure at the feed rollers
Remedy:
Reduce contact pressure at the feed rollers
Cause:
Wire electrode contains impurities or is corroded
Remedy:
Use high-quality wire electrode with no impurities
The welding torch becomes very hot
Cause:
Union nut on torch neck connection loose
Remedy:
Tighten the union nut
Cause:
The welding torch has been operated beyond its maximum duty cycle.
Remedy:
Lower the welding power or use a higher-capacity torch; observe the duty cycle and loading limits
Cause:
Coolant flow rate too low
Remedy:
Check coolant level, coolant through-flow, cleanliness of coolant, arrangement of hosepack, etc.
Contact tube only has a short service life
Cause:
Wire electrode worn due to heavy contact pressure at the feed rollers
Remedy:
Reduce contact pressure at the feed rollers
Cause:
Wrong dimension of contact tube
Remedy:
Use a contact tube of the correct dimension
Cause:
Duty cycle of welding torch has been exceeded
Remedy:
Shorten the ON times or use a higher-capacity torch
Cause:
Contact tube has overheated. No thermal dissipation, as the contact tube is fitted too loosely
Remedy:
Tighten the contact tube
NOTE! When using CrNi, the contact tube may be subject to a higher degree of wear due to the
nature of the surface of CrNi welding wire.
Weld seam porosity
Cause:
Soiled gas nozzle, causing inadequate gas-shielding of the weld seam
Remedy:
Remove welding spatter
Cause:
Either the shielding gas hose has holes in it, or the hose is not connected properly
Remedy:
Change the shielding gas hose, ensure the hose is connected properly
Cause:
The O-ring seals on the connection points are faulty
Remedy:
Change the O-ring seals
Cause:
Moisture/condensation in the shielding gas hose
Remedy:
Dry the shielding gas hose
Cause:
Shielding gas flow is either too high or too low
Remedy:
Correct the shielding gas flow
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