GYS TIG 220 AC/DC, Manual, Page: 26 / 114

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TIG 220 AC/DC
EN
TIG AC WELDING PROCESSES
TIG AC STD TIG AC PULSE
• TIG AC STANDARD
This TIG AC Standard mode is recommended to weld aluminium and alloys. (Al, AlSi, AlMg, AlMn…). AC current is essential to weld aluminium.
Balance (%T_AC) : during the positive wave, oxidation is broken. During the negative wave, the electrode cools and the parts are welded (penetra -
tion). By modifying the ratio between 2 alternatives through the balance adjustment, you choose either cleaning or penetration (the default value is
30%).
Frequency (Hz AC): the frequency enables adjustment of the arc concentration. The higher the frequency, the more concentrated the arc. The lower
the frequency the wider the arc will be.
Balance : 20 % Maximium penetration 50 % 60 % Maximum cleaning (scraping)
High frequency Low frequency
• TIG AC PULSE
The TIG AC Pulse is recommended for thin metal sheets, see details in the TIG DC PULSE section.
TIG AC/DC SPECIAL WELDING PROCESSES
• Le pointage - SPOT
This mode is recommended to pre-assemble workpieces before welding.
The adjustable spot weld duration enables control of the weld time for better spot welding results and an non-oxidised spot.
TIG DC SPOT TIG AC SPOT
Settings and options
Pictogram
Designation Spot time
Value Manual, 0.1s – 20s
• Spotting - TACK (TIG DC)
This mode can also pre-assemble workpieces, but in two phases : first phase is DC pulse whcih concentrates the arc for enhanced penetration, fol -
lowed by a DC standard phase which enlarges the arc and the weld pool for a good spot.
The adjustable duration of each phase enables control of the weld time for better spot welding results and an non-oxidised spot.