ims PRO PROTIG 201 AC/DC Mode D'emploi page 25

Translation of the original instructions
(e. g. : The welding current I is set to 100A and % (I_Cold) = 50%, i.e. a cold current = 50% x 100A = 50A. F(Hz) is set to 10 Hz, the signal period
will be 1/10 Hz = 100 ms. Every 100ms, a 100A pulse then a 50A pulse will succeed each other.
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
1,6 mm
2,4 mm
3,2 mm
4,0 mm
With this mode, the frequency value is related to the welding current value as follows :
Current (A)
10 > 40
41 > 90
91 > 140
141 > 170
171 > 200
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
The AC/DC current-frequency characteristic: In AC, the value of the welding current and its frequency are linked by the function below :
PROTIG 201 AC/DC - 201L AC/DC
I I
min max
10 A 80 A
45 A 120 A
60 A 180 A
75 A 200 A
Frequency (Hz)
117
100
79
70
60
Low frequency
Penetration and cleaning
30 %
37 %
43 %
50 %
EN
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