Tig Modes; Symbols And Their Explanations; 2-Step Mode - Fronius AccuPocket 150/400 TIG Operating Instructions Manual

TIG modes

Symbols and
their explana-
tions
Adjustable parameters:
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Fixed parameters:
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2-step mode

See the section on page for details on how to activate 2-step mode.
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2
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Pull back and hold the torch trigger
Release the torch trigger forwards
Push forward and hold the torch trigger
Release the torch trigger backwards
GPo: Gas post-flow time
I-S: Starting-current phase - the temperature is raised gently at low welding
current, so that the filler metal can be positioned correctly
I-E: Final current phase - to prevent crater cracks or cavitations
I-1: Main current phase (welding-current phase) - uniform thermal input into
the base material, whose temperature is raised by the continuous heat
I-2: Reduced current phase - intermediate lowering of the welding current in
order to prevent any local overheating of the base material
GPr: Gas pre-flow time
t : UpSlope phase - the welding current is continually increased
up
Duration = 0.5 seconds
t : DownSlope phase - the welding current is continually decreased
down
Duration = 0.5 seconds
t : Starting current duration
S
t : Final current duration
E
I
GPr
t
up
1 2
Place the tungsten electrode onto the workpiece and then pull the torch trig-
ger back and hold => shielding gas flows
Raise the tungsten electrode => arc ignites
I-1
t
down
3
t
GPo