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long resulting in intense heating of the tungsten electrode. The duty cycle should be
readjusted.
7.6. Oxide Layer on Aluminium Weld.
Duty-cycle setting is not long enough and needs readjustment or the secondary
inverter is faulty.
Maintenance
Safe operation of the machine is dependent on regular maintenance and the
replacement of worn and defective parts where necessary.
1. Daily Precautionary Checks
1.1. For any abnormal vibrations, sounds or odours.
1.2. For any sign of overheating on cable connections.
1.3. Whether the power switch is operational and the fan operates smoothly when
the machine is switched on.
1.4. Whether cables are correctly connected, insulated and in sound order.
1.5. Torch consumables are subject to wear and tear and should be replaced when
worn..
2. Three to Six Monthly Check List
2.1. Dust Removal
Remove the side cover plate and clean off all parts with dry compressed air. Since
the effective cooling of the machine is dependent on a designed air flow pattern, it is
important to return the side cover plate after the cleaning operation. Not paying
attention to this detail, will result in over-heating of and consequent damage to the
transformer and semi-conductor parts.
