6
Installation and commissioning 45
Minimum equipment needed for welding task............................................................................................ 47
General ................................................................................................................................................. 47
TIG AC welding..................................................................................................................................... 47
TIG DC welding..................................................................................................................................... 47
MMA welding ........................................................................................................................................ 47
Before installation and commissioning....................................................................................................... 48
Safety.................................................................................................................................................... 48
Utilisation for intended purpose ............................................................................................................ 48
Setup regulations .................................................................................................................................. 48
Mains connection .................................................................................................................................. 48
Generator-powered operation (MW 1700 / 2200, TT2200)................................................................... 49
Connecting up the mains cable on US power sources .............................................................................. 50
General ................................................................................................................................................. 50
Stipulated mains cables and strain-relief devices ................................................................................. 50
Safety.................................................................................................................................................... 50
Connecting the mains cable.................................................................................................................. 50
Replacing the strain-relief device.......................................................................................................... 51
Start-up ...................................................................................................................................................... 53
Safety.................................................................................................................................................... 53
Remarks on the cooling unit ................................................................................................................. 53
General ................................................................................................................................................. 53
Connecting the gas cylinder.................................................................................................................. 53
Establishing a ground (earth) connection to the workpiece .................................................................. 54
Connecting the welding torch................................................................................................................ 54
Welding 55
TIG modes ................................................................................................................................................. 57
Safety.................................................................................................................................................... 57
Symbols and their explanations ............................................................................................................ 57
2-step mode .......................................................................................................................................... 58
4-step mode .......................................................................................................................................... 58
Special 4-step mode: variant 4 ............................................................................................................. 59
Cap shaping and cap overloading ............................................................................................................. 60
Cap shaping.......................................................................................................................................... 60
TIG welding................................................................................................................................................ 61
Safety.................................................................................................................................................... 61
Welding parameters.............................................................................................................................. 61
Preparation ........................................................................................................................................... 62
TIG welding........................................................................................................................................... 62
Igniting the arc ........................................................................................................................................... 64
General ................................................................................................................................................. 64
Igniting the arc using high frequency(HF ignition)................................................................................. 64
Touchdown ignition ............................................................................................................................... 65
End of welding ...................................................................................................................................... 66
Special functions and options .................................................................................................................... 67
Arc break watchdog function................................................................................................................. 67
Ignition time-out function....................................................................................................................... 67
Tacking function.................................................................................................................................... 67
MMA welding ............................................................................................................................................. 69
Safety.................................................................................................................................................... 69
Preparation ........................................................................................................................................... 69
Manual metal arc welding ..................................................................................................................... 69
Hotstart function.................................................................................................................................... 70
Anti-stick function.................................................................................................................................. 71
Setup settings 73
The Setup menu ........................................................................................................................................ 75
General ................................................................................................................................................. 75
Overview ............................................................................................................................................... 75
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