UNIMIG Cat 2017 low res

TECHNICAL NOTES
TIG
EXAMPLE 1 OF PULSE DC TIG WELDING - SETUP PARAMETERS:
Material = Stainless Steel x 2.0mm / Tungsten Electrode = 1.6mm 2% Thoriated / Gas = Argon
The following steps are a guide as a starting point for you to set the machine up in Pulse mode to give an example of
welding in Pulse mode 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 DC TIG welding as per the DC HF TIG operating guide on page 18­
(2) Set the Peak Current at 110 Amps
(3) Set the Base Current around 30% (Base Current is % of the Peak Current eg 30% of 110 = 33 Amps)­
(4) Set the Pulse Frequency around 2Hz (pulses per second)­
(5) Set the Pulse Width around 50% (the current will be 50% at Peak Current and 50% at Base Current)
Time = 1 second
Peak Current
Base
Current
110A
Pulse Width
On
Time
110A
50%
33A 33A 33A
50%
(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 Pulse vs Non Pulse weld finish
EXAMPLE 2 OF PULSE DC TIG WELDING - SETUP PARAMETERS:
Material = Mild Steel x 4.0mm / Tungsten Electrode = 2.4mm 2% Thoriated / Gas = Argon
(1) Set the Peak Current at 150 Amps
(2) Set the Base Current around 20% (Base Current is % of the Peak Current eg 40% of 180 = 72 Amps)
(3) Set the Pulse Frequency around 1Hz (pulse per second)
(4) Set the Pulse Width around 80% (the current will spend 80% at Peak Current and 20% at Base Current)
Time = 1 second
Peak
Current
180A
Base
Current
180A
Pulse Width
On
Time
180A
80%
72A 72A 72A
20%
NOTE: Do not use a tugsten electrode that has been used on mild steel or stainless steel as it can
contaminate the welding material
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