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Poor wirefeed
Cause:
Wire does not fit
Remedy:
Check the position of the wire inlet nozzle relative to the feed rollers,
and correct as necessary
Cause:
Brake force on the CMT wirefeeder set too high
Remedy:
Set the brake on the CMT wirefeeder to a looser setting
Cause:
Hole in contact tube constricted due to deposits
Remedy:
Change the contact tube
Cause:
The wire feed inner liner or wire feed insert is defective
Remedy:
Check the wire feed inner liner and wire feed insert for kinks, dirt,
etc. ; change the faulty liner or wire feed insert
Cause:
The wirefeed rollers are not suitable for the wire electrode being used
Remedy:
Use suitable wire feed rollers
Cause:
The wirefeed rollers are exerting the wrong contact pressure
Remedy:
Check the contact pressure, adjust if necessary
Cause:
The wirefeed rollers are soiled or damaged
Remedy:
Clean the wirefeed rollers or exchange them for new ones
Cause:
Inner line was kinked while being inserted
Remedy:
When inserting the inner liner, only handle it around the infeed tube
Cause:
The inner liner has been cut too short
Remedy:
Replace the inner liner and cut it to the correct length
Cause:
Welding wire worn due to heavy contact pressure at the feed rollers
Remedy:
Reduce contact pressure at the feed rollers
Cause:
Welding wire contains impurities or is corroded
Remedy:
Use high-quality welding wire with no impurities
Cause:
Contact tube without centre hole is used
Remedy:
Change the contact tube, use contact tube with centre hole.
The welding torch becomes very hot
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
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