Arc Ignition; Liftarc; Operating Modes (Functional Sequences); Explanation Of Signs And Functions - EWM Control HP-XQ Operating Instructions Manual

Functional characteristics
TIG welding
5.5.2

Arc ignition

5.5.2.1

Liftarc

The arc ignites through contact with the workpiece:
a) Carefully place the torch gas nozzle and tungsten electrode tip against the workpiece (lift arc current
flows independent of the set main current)
b) Angle the torch above the torch gas nozzle until the distance between electrode tip and workpiece is
approx. 2–3 mm (arc ignites, current increases to the set main current).
c) Lift the torch off and bring into normal position.
Complete the welding task: Remove the torch from the workpiece so that the arc extinguishes.
5.5.3

Operating modes (functional sequences)

5.5.3.1

Explanation of signs and functions

Symbol Meaning
Press torch trigger
Release torch trigger
Tap torch trigger (press briefly and release)
Shielding gas flowing
I Welding output
Gas pre-flows
Gas post-flows
Non-latched
Special, non-latched
Latched
Special, latched
t Time
P Ignition program
START
P Main program
A
P Reduced main program
B
P End program
END
tS1 Slope duration from PSTART to PA
56
Figure 5-42
099-00HPXQ-EW501
07.05.2021