Fronius TransTig 170, Operating Instructions Manual

Page: 54 / 100

54
Special functions
Arc Break Moni -
toring Function
If the arc breaks and no current flow takes place during the time set in the Setup menu, the
power source automatically switches off. The control panel displays the service code "no |
Arc".
Press any button on the control panel or the torch trigger to restart the welding process.
The "2nd Level Setup Menu" section describes how to set the arc break monitoring (Arc)
setup parameters.
Ignition Time-Out
Function
The power source has an ignition time-out function.
If the torch trigger is pressed, gas pre-flow begins immediately. Then the ignition procedure
is initiated. If no arc emerges during the period of time set in the Setup menu, the power
source automatically switches off. The control panel displays the service code "no | IGn".
Press any button on the control panel or the torch trigger to launch a further attempt.
The "2nd Level Setup Menu" section describes how to set the "ignition time-out function"
(Ito) parameter.
TIG pulsing The welding current set at the start of welding may not always be optimum for the entire
welding process:
- If the amperage is too low, the parent material will not be melted enough
- If overheating occurs, there is a danger that the liquid weld pool may drip.
The TIG pulsing function is able to help with this (TIG welding with a pulsing welding cur -
rent):
A low base current I-G rises steeply to a significantly higher pulse current I1 and falls again,
after the set time dcY (duty cycle), to the base current I-G.
During TIG pulsing, small sections of the welding point are quickly melted and then allowed
to quickly solidify again.
During manual applications, the welding wire is applied in the maximum current phase
during TIG pulsing (only possible in the low frequency range from 0.25 - 5 Hz). Higher pulse
frequencies are mostly used in automated applications and mainly serve to stabilize the
arc.
TIG pulsing is used to weld steel pipes when welding out-of-position or to weld thin sheet
metal.