Hf Ignition - Fronius TransTig 2200 Instructions De Service

HF ignition

For details of how to adjust the set-up parameter "HFt", please refer to the section
headed "The set-up menu: - sub-section "TIG set-up parameters".
Use the HFt parameter to set the time interval of the HF impulses to the required value
(setting range: 0.01 to 0.4 sec).
Compared with touchdown ignition, HF ignition eliminates the risk of contamination of
the electrode and of the workpiece.
To ignite the arc, proceed as follows:
Fig.10 Placing the gas nozzle
Fig.11 Non-contact HF ignition
Fig.12 Welding
Note! If there are problems with sensitive equipment in the immediate vicinity,
increase the HFt parameter to a maximum of 0.4 s.
HF status indicator: Remains lit up as long as a value is specified for the HFt para-
meter.
- Place the gas nozzle down on the
ignition location in such a way that
there is a gap of approx. 2 to 3 mm
(0.08 to 0.12 in.) between the tungs-
ten electrode and the workpiece.
- Increase the tilt angle of the torch,
and actuate the torch trigger in the
sequence required for the operating
mode you have selected
(see the section headed "TIG opera-
ting modes")
- The arc ignites, without the electrode
touching down on the workpiece
- Tilt the torch back into the normal
position
28