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INITIAL OPERATION
Secondary errors during TIG welding
Safety disconnection
Cause: During 4-times trigger operation, welders
sometimes start a welding sequence and
then put the torch down by accident. In
such circumstances the machine will
retain voltage in the torch, and HF and the
gas valve will remain active, which is
dangerous for the welder concerned.
Reaction: If the arc is not initiated within 2 seconds,
the welding cycle stops.
Torch lift
Cause: During welding the welder may lift the TIG
torch away from the workpiece by acci-
dent, which results in the extinction of the
torch arc.
Reaction: The machine is initiated for 2 seconds,
after which the welding cycle stops.
Fixed functions
Antifreeze
MMA function
During electrode welding, electrodes sometimes stick
to the workpiece. The machine registers the fact that
the electrode has stuck onto the workpiece, and will
reduce the welding current to 5 A. This leads to the
hardening of the pool crater, and the electrode can
then be broken off. Welding can then be resumed in
normal fashion.
Arc power
MMA function
The arc power function is used to stabilise the arc
during electrode welding. This can be achieved by in-
creasing the welding current during short-circuits. This
function is only available when using coated elec-
trodes.
Pre-flow
TIG function – Gas pre-flow time
The gas pre-flow time is the time that elapses
between the activation of the torch trigger (which
establishes a gas supply) and the establishment of
the welding current.
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