24
Cause:
Only on water-cooled machines: water flow is insufficient
Remedy:
Check water level, water flow rate and cleanliness, routing of hosepack, etc.
Contact tubes only give a short service life
Cause:
Incorrect wirefeed rollers
Remedy:
Use correct wirefeed rollers
Cause:
Wire electrode worn due to excessive contact pressure at the wirefeed rollers
Remedy:
Reduce contact pressure at the wirefeed rollers
Cause:
Wire electrode contains impurities/corroded
Remedy:
Use high-quality wire electrode with no impurities
Cause:
Uncoated wire electrode
Remedy:
Use wire electrode with suitable coating
Cause:
Wrong dimension of contact tube
Remedy:
Use a contact tube of the correct dimensions
Cause:
Duty cycle of welding torch has been exceeded
Remedy:
Shorten the duty cycle or use a higher capacity torch
Cause:
Contact tube has overheated. No thermal dissipation as the contact tube is too loose
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.
Lock washer is not clamping the gas nozzle
Cause:
Dirty lock washer, twisted lock washer
Remedy:
Clean off any dirt, turn the lock washer to tighten, push the gas nozzle down at the front while
tightening
Weld-seam porosity
Cause:
Spatter build-up in the gas nozzle causing inadequate gas-shielding of the weld seam
Remedy:
Remove welding spatter
Cause:
Either the protective gas shield hose has holes in it, or the hose is not connected properly
Remedy:
Replace protective gas shield hose
Cause:
The O-ring seals on the connection points have been cut through or are faulty
Remedy:
Replace the O-ring seals
Cause:
Moisture/condensation in the protective gas shield line
Remedy:
Dry protective gas shield line
Cause:
Protective gas shield flow is either too high or too low
Remedy:
Correct the protective gas shield flow
Cause:
Insufficient protective gas shield flow rate when welding starts or finishes
Remedy:
Increase gas pre-flow and gas post-flow
Cause:
Rusty or poor quality wire electrode
Remedy:
Use high-quality wire electrode with no impurities
Cause:
For gas-cooled welding torches: protective gas is escaping through a non-insulated inner liner
Remedy:
Use only insulated inner liners with gas-cooled welding torches
Cause:
Too much parting agent applied
Remedy:
Remove excess parting agent/apply less parting agent
Содержание Robacta MTG 3500
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Страница 104: ...1 Spare parts list MTG 3500 5000 MTW 3500 5000...
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