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Cause:
Wirefeed components do not match the diameter of the wire electro-
de/wire electrode material
Remedy:
Use the correct wirefeed components
Poor wirefeeding
Cause:
Depending on the system, brake force in wirefeeder or power source
set too high
Remedy:
Reduce the brake force
Cause:
Hole in the contact tip is displaced
Remedy:
Change the contact tip
Cause:
The inner liner or wire-guide insert is defective
Remedy:
Check the inner liner and wire-guide insert for kinks, dirt, etc.
Change the defective inner liner or wire-guide insert
Cause:
The feed rollers are not suitable for the wire electrode being used
Remedy:
Use suitable wirefeeder rollers
Cause:
Wirefeeder rollers have the wrong contact pressure
Remedy:
Optimise contact pressure
Cause:
The wirefeeder rollers are soiled or damaged
Remedy:
Clean or replace wirefeeder rollers
Cause:
Inner liner wrongly fitted or kinked
Remedy:
Replace inner liner
Cause:
The inner liner has been cut too short
Remedy:
Replace the inner liner and cut the new inner liner to the correct
length
Cause:
Wire electrode worn due to excessive contact pressure on the wire-
feeder rollers
Remedy:
Reduce contact pressure on the wirefeeder rollers
Cause:
Wire electrode contains impurities or is corroded
Remedy:
Use high-quality wire electrode with no impurities
Cause:
For steel inner liners: use of uncoated inner liner
Remedy:
Use a coated inner liner
Cause:
Clamping nipple in wire entry and wire exit area deformed (oval, kno-
cked out), shielding gas escaping at clamping nipple
Remedy:
Replace clamping nipple to ensure a gas-tight seal
The gas nozzle becomes very hot
Cause:
No thermal dissipation as the gas nozzle is too loose
Remedy:
Screw on the gas nozzle as far as it will go
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