Discovery 221AC/DC Evo

Discovery 221AC/DC Evo is a revolutionary state-of-the-art 1Phase portable TIG AC/DC welding Inverter. TIG AC functions are ideal for welding aluminum, magnesium, and related alloys. Ordinary steels, stainless steel and copper can be easily welded in TIG DC.
Discovery 221AC/DC Evo is specifically designed for extremely precise welding in the construction, petrochemical, food industries and other applications that require very a high welding performance.

The new user interface (EVO) provides fast and effective access to all available functions. 50 programs can be loaded and saved in memory (JOB), All programs can be easily recalled when using an Up/Down torch. It is also possible to create different jobs´ sequences to be used on specific applications. Simple selection of the MMA mode provides a choice of the electrode-type (basic, rutile, CrNi, Alu) setting, resulting in optimizing the weldability and parameters. It is also possible to
control the polarity switch (swap) directly from the user interface, avoiding any cable disconnection. Finally the function AC (for welding in alternate current) is additionally available, this is particularly suitable for the welding of special electrodes.


Download the Catalogue Dicovery 221AC/DC Evo_ENG.PDF


Download the Manual DISCOVERY 221AC/DC EVO (EN).pdf

WECO CU-12 (EN).pdf CE Discovery 221AC/DC EVO CE CU-12




CE Discovery 221AC/DC EVO CE CU-12




1x230Vac ± 15% @ 50-60Hz
16A 25A
35% 60% 100% 40% 60% 100%
220A 180A 160A 180A 150A 120A
5A – 220A 10A – 180A
6,2KVA – 6,1KW
460 x 230 x 325mm



Weco PFC

Special Functions



Discovery 221AC/DC Evo is a high sophisticated single Phase Inverter TIG AC/DC portable welding machine. In TIG DC mode this inverter generator can easily weld ordinary steels, stainless steel and copper.

Discovery 221AC/DC Evo is particularly indicated for extremely precise constructions, in petrochemical plants, food industry and other activities which require very high welding performance.

The inner PFC W.ECO device (Power Factor Corrector) reduces harmonic current emissions according to the CE regulations. Weco Special HF control grants 100% a rapid and highly precise arc ignition.

The AC welding is here optimized thanks to:

  • The synergic arch ignition can be adjusted from the front panel by the calibration of the tungsten electrode’s diameter.
  • The EXTRA FUSION function allows to shift the waveform towards the negative part with respect to zero. This makes it possible to create a highly penetrative and precise fusion bath, so that very light gauge sheets can be welded with an electrode tip comparable to that of an electrode for DC- TIG welding.
  • The MIX AC-DC wave allows to combine the efficacy of AC TIG welding with the high penetration of DC TIG welding, thus obtaining high welding speed and creating the weld puddle rapidly on a cold work piece. It is also possible to weld heavier aluminium gauges with lower amperage compared to standard AC/DC TIG welding.
  • The PULSE AC/DC welding is besides useful when welding for long time, in order to reduce the deformation on the base material.

The DC welding is here optimized thanks to:

  •   TIG PULS up to 2,5 Khz and TIG PULS SYN (Synergic)
  • The Dynamic Arc (DYNarc) function which ensures an enhanced welding penetration, a better stability of the arc, avoiding any gluing between electrode and base metal; it allows to adjust the welding arc, just through slight torch’s movements, at any welding conditions.
  • The Q-Start function, makes the sheet tacking easier and minimize the time for it at the beginning of the welding process.
  • The Multi-Tack function, allows to minimize the heat output during the welding process and reduces the base material’s oxidation. This function permits often to avoid the post welding acid-treatments.
  • The Q-Spot function, permits to carry out very easily and precisely the sheet tacking operation, with minimum heat output and sheet deformation. It allows the positioning of the electrode on the exact tacking spot.
  • 50 programs can be loaded and saved in memory
  • Remote controls are available: for torch (UP&DOWN, potentiometer), foot pedal or remote control unit
  • Cooling unit, available