UNIMIG Cat 2017 low res

TECHNICAL NOTES
TIG
EXAMPLE 1: PULSE AC TIG WELDING - SETUP PARAMETERS:
Material = Aluminium x 3.0mm / Tungsten Electrode = 2.4mm Zirconiated / Gas = Argon
The following steps are a guide as a starting point for you to set the machine up in AC Pulse mode to give an example
of welding in AC Pulse TIG function. You can experiment by changing any of the variables to see what effect it has
over the welding and what the end result can be, but it is suggested to change only one variable at a time and then
check the welding to see what the result is, in this way you acquire a better understanding of how each variable affects
the welding current.
(1) Prepare the machine for AC TIG welding as per the AC TIG operating guide on page 23
(2) Set the Peak Current at 150 Amps
(3) Set the Base Current around 40% (Base Current is % of the Peak Current eg 40% of 150 = 60 Amps)
(4) Set the Pulse Frequency around 1Hz (pulses per second)
(5) Set the Pulse Width around 60% (the current will spend 60% at Peak Current & 40% at Base Current)
Time = 1 second
Peak
Current
150A
Base
Current
150A
Pulse Width
On
Time
150A
60%
60A 60A 60A
40%
(2) Set the Peak Current at 110 Amps
(3) Set the Base Current at 30% (4) Set the Pulse Frequency at 2 Hz
(5) Set the Pulse Width at 50%
(6) Set the Pulse Selector switch to Pulse
Example of Pulsed weld finish
298