Fronius TransTig 170, Operating Instructions Manual

Page: 43 / 100

43
EN
-U
S
TIG Operating Modes
Safety
WARNING!
Danger due to incorrect operation.
This can result in severe personal injury and damage to property.
► Do not use the functions described here until you have fully read and understood the
Operating Instructions.
► Do not use the functions described here until you have fully read and understood all of
the Operating Instructions of the system components, especially the safety rules.
Follow the guidelines referring to setting, setting range, and units of measurement for the
available parameters in the "Setup Menu" section.
Symbols and ex -
planations
Pull back and hold the torch trigger | Release the torch trigger | Briefly pull back the torch trigger (< 0.5 s)
Push the torch trigger forward and hold | Release the torch trigger
I
S
Starting-current phase: the temperature is raised gently at low welding current, so
that the filler metal can be positioned correctly
t
S
Starting current duration
t
up
UpSlope phase: steady rise of the starting current to the main current (welding cur -
rent) I
1
I
1
Main current phase (welding current phase): uniform thermal input into the parent
material, whose temperature is raised by the advancing heat
I
2
Lowering current phase: intermediate lowering of the welding current to avoid local
overheating of the parent material
t
down
DownSlope phase: steady lowering of the welding current until it reaches the final
current
I
E
Final current phase: to avoid local overheating of the parent material caused by
heat accumulation at the end of welding. This prevents possible sagging of the
weld seam.
t
E
Final current duration
SPt Spot welding time