Fronius MTG 250d Manual De Instrucciones página 61

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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