Tig Operating Modes; General Remarks; Symbols And Their Explanations - Fronius TransTig 2200 Operating Instructions Manual

TIG operating modes

General remarks

Please see the section headed "The Set-up menu: Level 1" for information on the
settings, setting range and units of measurement of the available parameters.
Symbols and
their
explanations
Push forward and hold the
Symbol
GPr
I
S
t
up
I
1
I
2
t
down
I
E
SPt
G-H/G-L
Warning! Operating the equipment incorrectly can cause serious injury and
damage. This section explains the operating modes. Do not use the functions
described here until you have read and completely understood the whole of the
"Operating Instructions" manual.
Pull back and hold the
torch trigger
torch trigger
Explanation
Gas pre-flow time
Starting-current phase: The temperature is raised gently, at low welding
amperage, so that the filler metal can be positioned correctly
Upslope phase: The starting current is continuously increased, until it
reaches the welding amperage
Welding-current phase: Uniform thermal input into the base metal, whose
temperature is raised by the advancing heat
Reduced-current phase: Intermediate lowering of the welding amperage,
in order to prevent any local overheating of the base metal
Downslope phase: The welding current is continuously lowered, until it
reaches the final current.
End-crater (final-current) phase: To prevent any local overheating of the
base metal due to heat build-ups towards the end of welding. This
eliminates any risk of weld drop-through.
Spot-welding time
Gas post-flow time
G-H Gas post-flow time at maximum welding amperage
G-L Gas post-flow time at minimum welding amperage
Release the torch trigger
Release the torch trigger
27
Briefly pull back the
torch trigger (< 0.5 s)