Design and function
Shielding gas supply (shielding gas cylinder for welding machine)
099-000159-EW501
16.08.2016
39
5.10.8.3 Latched mode
Figure 5-22
1
st
cycle
• Press torch trigger 1; 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 set ignition current
(search arc at minimum
setting). HF switches off.
2
nd
cycle
• Release torch trigger 1.
• The welding current ramps up to the main current
(AMP) in the selected up-slope time
.
Switching from the main current AMP to secondary current
(
AMP%
)
:
• Press torch trigger 2 or
• Tap torch trigger 1 (torch modes 1–4).
3
rd
cycle
• Press torch trigger 1.
• The main current decreases to the end-crater current
within the set down-slope time
.
4
th
cycle
• Release torch trigger 1; arc is extinguished.
• Set gas post-flow time
runs.
Ending the welding process immediately without a down-slope or end-crater current:
• Press the 1
st
torch trigger briefly > 3
rd
and 4
th
cycles (torch modes 11–14).
Current drops to zero and the gas post-flow time begins.
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.
A double-digit torch mode (11-x) needs to be set at the welding machine control to use the
alternative welding start (tapping start). The number of torch modes available depends on the
machine type.
