GT Trans Pocket 4000 CEL Mode D'emploi page 91

TIG welding 6.
(continued)
7.
8.
a) Place gas nozzle on
Fig.28 Arc ignition
9.
Welding current
50 A
100 A
150 A
200 A
250 A
300 A
350 A
400 A
10. To finish the welding operation, take off the TIG gas-valve torch from the compo-
11. At the end of the welding operation, wait the gas post-flow time
12. Close the gas shut-off valve on the TIG gas-valve torch
All parameter command values that have been set by means of the adjusting dial (1) will
remain stored until the next time they are changed. This is true even if the power source
is switched off and on again in the meantime.
Place the the gas nozzle on the ignition location so that there is a gap of 2 -3 mm
between the tungsten tip and the workpiece (Fig.28a)
Gradually tilt up the welding toch until the tungsten tip touches the workpiece
(Fig.28b)
Raise the torch and pivot it into the normal position - the arc ignites (Abb.28c)
workpiece
Start welding
NOTE! When the weld is finished, the gas post-flow time required to protect the
tungsten electrode and the weld depends on the welding current
nent, untill arc extinguishes.
b) Touch down tungsten tip to
ignite arc
23
c) Arc is ignited
gas post-flow time
6 s
7 s
8 s
9 s
12 s
13 s
14 s
16 s