Fronius Robacta MTG 2500 Bedienungsanleitung Seite 41

Remedy: Check leak-tightness of blow-through line and blow-through valve.
Check closure seal of blowthrough line (push-on nipple)
Poor wirefeed
Cause: Braking force set too high
Remedy: Set the brake to a looser setting
Cause: Hole in contact tube is dislocated
Remedy: Exchange the contact tube
Cause: The wire feed inner liner or wire feed insert in the welding torch is de-
fective
Remedy: Check the wire fee inner liner and wire feed insert for kinks, dirt etc.
Cause: The wirefeed rollers are not suitable for the wire electrode being used
Remedy: Use suitable wirefeed rollers
Cause: The wirefeed rollers are exerting the wrong contact pressure
Remedy: Optimise the contact pressure
Cause: The wirefeed rollers are soiled or damaged
Remedy: Clean the wirefeed rollers, or exchange them for new ones
Cause: Inner liner or wire feed insert dislocated or kinked
Remedy: Exchange the inner liner or wire feed insert
Cause: The inner liner, the wire feed insert or wire inlet nozzle are of the
wrong dimension
Remedy: Ensure that the inner liner, wire feed insert or wire inlet nozzle are
correctly dimensioned
Cause: The inner liner was kinked while being inserted
Remedy: When inserting the inner liner, only touch and hold it near the infeed
tube
Cause: After being cut to length, the inner liner is too short
Remedy: Exchange the inner liner and shorten it to the correct length
Cause: The wire is being abraded due to excessive contact pressure on the
wirefeed rollers
Remedy: Reduce the contact pressure on the wirefeed rollers
Cause: Welding wire is dirty / slightly rusty
Remedy: Use only high-quality wires that are free of contaminants
The welding torch becomes very hot
Cause: The torch has been operated beyond its maximum amperage rating.
Remedy: Lower the welding power or use a higher-capacity torch
Cause: The design dimensions of the torch are not sufficient for this task
Remedy: Respect the duty cycle and loading limits
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