Shutdown; Maintenance; Inspection And Service - ESAB MobileFeed 301 AVS Instruction Manual

6 MAINTENANCE

NOTE!
It is NOT RECOMMENDED to use the CV switch setting when using a CC power
source. Extreme wire feed speed sensitivity exists that makes it difficult to set
stable welding condition. The arc stability is very dependant on maintaining
constant "Tip To Work" (TTW) distance which is almost impossible to control
when welding manually. CV setting is only recommended for use with CV power
sources.
Typical welding voltages for 5000 Aluminum are between 21 and 25 volts which
limits the wire feed speed of the MobileFeed especially if trying to weld with 035"
diameter 5356 alloy. Welding with wire diameters ≤3/64" and/or below 22 arc
volts could cause problems with limited wire feed speed and the inability to
achieve a good welding condition.
NOTE!
On many CV power sources the actual welding arc voltage is less than the "Open
Circuit Voltage" (OCV) set on the power source front panel. Therefore, an extra 3
to 6 volts may be added to the power source front panel setting to achieve the
actual arc voltage needed or shown in the tables.
5.3.6

Shutdown

1. Release the torch trigger switch to break the arc.
2. When leaving the equipment unattended, always turn off and disconnect all power to the
equipment and turn off the shielding gas supply at source.
6 MAINTENANCE
WARNING!
Make sure that the branch circuit or main disconnect switch is OFF or electrical
input circuit fuses are removed from the power source main supply before
attempting any inspection or work on the inside of the wire feeder. Placing the
power switch on the welding machine in the OFF position does not remove all
power from inside of the equipment.
WARNING!
Inspection, troubleshooting, and repair of this equipment should be undertaken
by a competent individual having at least general experience in the maintenance
and repair of semi-conductor electronic equipment. Maintenance or repair should
not be undertaken by anyone not having such qualifications.
6.1

Inspection and service

Keep equipment in clean and safe operating condition, free of oil, grease, liquid and metallic
particles which can cause short-circuits.
Regularly check cylinder valves, regulators, hoses and gas connections for leaks with soap
solution.
Check for and tighten loose hardware including electrical connections. Loose power
connections overheat during welding.
Immediately replace all worn or damaged power cables and connectors. Check for frayed
and cracked insulation, particularly in areas where conductors enter equipment.
0558 012 634 - 22 - © ESAB AB 2015