User Manual
Version 1.0k of 11.06.2019
Original manual
PONTIG 202 AC/DC MOST
-18-
8.4 TIG AC Pulse welding
tc - positive electrode time, tp - AC current period
Tp - pulse peak time, T - pulse period
Figure 14: TIG AC current flow with additional pulse
To choose the method press button (
12
), the diode (
8
) lights up (see figure 4).
The TIG AC welding with an additional pulse is distinguished by a different waveform AC and
additional values of the peak current and the background current. Preset peak current
and the background current is respectively the peak value of the low frequency pulse (average
value) and background value (average value). The settings are similar to those described in the
chapter 8.2 (AC welding with a square wave). To set the frequency of the current pulse and the
duration of the pulse you can refer to the values as for TIG DC pulse welding. Frequency of AC
(1 / T) pulses can be adjusted in the range from 0.2 to 200 Hz. Pulse duration ratio (Tp / T)
can be adjusted from 1-99%.
9. Operating mode available on the TIG torch trigger
The TIG operating mode determines the operation of the torch trigger in the TIG method. The
operating mode can be connected to the remote control in the grip handle.
The operating mode of the TIG torch should be selected in accordance with the welding tech-
nology and welding preferences at the workplace. All TIG operating modes for this device are
listed in this chapter.
Notes on the operation of the torch trigger
2-stroke operation mode (2T): Press
the torch trigger to start welding
2-stroke operation mode (2T): Rele-
ase the torch trigger to stop welding
4-stroke operation mode (4T): Press
the torch trigger, and then release
release it at any time, the welding
current stays on without having to hold
the trigger
4-stroke operation (4T): to stop
welding again press the torch trigger,
the current will start to fall to the final
value.