The choice of frequency
• If thin plate without TIG electrodes (< 0.8 mm), F(Hz) > 10Hz,
• If special metal requiring a welding pool sweep for degassing, then F(Hz) 5 < 100Hz.
The frequency adjustment in TIG DC pulsed is done by pressing and releasing the pulse frequency adjustment button and then operating the
main incremental encoder. Frequency value increases when the incremental encoder is operated clockwise and decreases when it is operated anti-
clockwise. This frequency ranges from 0.1 Hz to 2 KHz.
Example :
= 1 KHz.
Once the setting has been done, press the frequency setting button again or wait 2 seconds for the power source to return to the main menu. Pulsed
DC welding is available for the "TIG HF" and "TIG LIFT" processes and the "2T" and "4T" trigger modes.
TIG AC WELDING
•
TIG AC - Easy
This mode allows a quick use of AC welding by adjusting the electrode diameter (the selected value is indicated by the different LEDs on the HMI).
With this mode, "Balance" and "Frequency" settings parameters are unchangeable. The choice of the electrode diameter affects the welding current
and the scraping values as follows :
Electrode diameter
I
min
I
max
Penetration and cleaning
1,6 mm
10 A
80 A
30 %
2,4 mm
45 A
120 A
37 %
3,2 mm
60 A
180 A
43 %
4,0 mm
75 A
200 A
50 %
With this mode, the frequency value is related to the welding current value as follows :
Current (A)
Frequency (Hz)
10 > 40
117
41 > 90
100
91 > 140
79
141 > 170
70
171 > 200
60
When switching from "AC - Easy" to "AC" mode, the last welding parameters "AC - EASY" are retained and can be used as a basis for further
refinement in "AC" (e.g. : welding frequency and balance).
•
TIG AC - Standard
This TIG AC - Standard welding mode is dedicated to welding aluminium and its alloys (Al, AlSi, AlMg, AlMg, AlMn...). Alternating current (AC) includes
a cleaning phase which is essential for aluminium welding.
The balance: It allows the part to be cleaned during welding. The balance: It allows the part to be cleaned during welding.
The frequency: the frequency is used to adjust the concentration of the arc. A high frequency generates a concentrated arc. A low frequency
generates a wider arc.
High frequency
Low frequency
The AC/DC current-frequency characteristic: In AC, the value of the welding current and its frequency are linked by the function below :
Current
AC Current as a function
of Frequency
Fréquence (Hz)
Courant (A)
0
50
150
100
200
150
200
Frequency
Up to 100 Hz it is possible to weld at a welding
current of 200 A. Between 100 Hz and 200
Hz, the maximum value of the welding current
decreases from 200 A to 150 A.
25
EN
Translation of the original instructions
PROTIG 201 AC/DC - 201L AC/DC
