Design and function
TIG welding
099-000124-EW501
29.07.2011
31
5.6.8.3
Latched mode
I
I
start
AMP
I
end
t
Up
t
Down
t
AMP%
1.
2.
3.
4.
Figure 5-11
Step 1
• Press torch trigger 1, the gas pre-flow time elapses.
• HF ignition pulses jump from the electrode to the workpiece, the arc ignites.
• Welding current flows and immediately assumes the ignition current value set (search arc at minimum
setting). HF is switched off.
Step 2
• Release torch trigger 1.
• The welding current increases with the set up-slope time to the main current AMP.
Switching from main current AMP to secondary current AMP%:
• Press torch trigger 2 or
• Tap torch trigger 1
The slope times can be set (see chapter "Advanced settings", section "Setting slope times for
secondary current AMP% or pulse edges".
Step 3
• Press torch trigger 1.
• The main current drops with the set down-slope time to the end-crater current I
end
(minimum current).
Step 4
• Release torch trigger 1, the arc extinguishes.
• The set gas post-flow time begins.
Immediate termination of the welding procedure without down-slope and end-crater current:
• Briefly press the 1st torch trigger (3rd and 4th step).
The current drops to zero and the gas post-flow time begins.
NOTE
When the
foot-operated remote control
RTF is connected, the machine switches
automatically to non-latched operation.
The up- and down-slopes are switched off.
The user can initiate the welding operation also by lightly tipping the torch trigger. This
function is available from torch mode 11 (see chapter "Torch mode setting)."
