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Weco Discovery 221AC/DC-VRD Evo Instruction Manual

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Translation of original instructions
Discovery
Discovery
Instruction manual
Cod. 006.0001.2000
08/03/2022 V.2.2
221AC/DC Evo
221AC/DC-VRD Evo
300AC/DC Evo
300AC/DC-VRD Evo
ENG

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Summary of Contents for Weco Discovery 221AC/DC-VRD Evo

  • Page 1 Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 221AC/DC Evo 221AC/DC-VRD Evo Discovery 300AC/DC Evo 300AC/DC-VRD Evo Instruction manual Translation of original instructions...
  • Page 2 Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH...

  • Page 3: Table Of Contents

    Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH INDEX INTRODUCTION ............................4 INTRODUCTION ............................5 INSTALLATION ............................6 CONNECTIONS TO THE ELECTRICAL MAINS NETWORK ..............6 FRONT PANEL ............................. 6 REAR PANEL ............................... 7 PREPARING FOR MMA WELDING ......................8 PREPARING FOR TIG WELDING .......................

  • Page 4: Introduction

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH INTRODUCTION IMPORTANT! This handbook must be consigned to the user prior to installation and commissioning of the unit. Read the "General prescriptions for use" handbook supplied separately from this handbook before installing and commissioning the unit.

  • Page 5: Introduction

    Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 1.1 INTRODUCTION Discovery 221AC/DC Evo/VRD Evo is an advanced technology single-phase welding power source for AC and DC TIG welding operations. Discovery 300AC/DC Evo/VRD Evo is an advanced technology three-phase welding power source for AC and DC TIG welding operations. AC TIG functions are ideal for aluminium, magnesium and related alloys welding. Mild steel, stainless steel and copper can be easily welded in DC TIG. AC TIG welding is optimized thanks to: Synergic arc strike can be selected by the user interface according to tungsten electrode diameter. Extra fusion function maximizes arc focusing for considerable thin material in AC TIG welding. Mixed AC/DC increases arc penetration for thick aluminium plates. Pulsed AC TIG mode which prevents the risk of deformation of the workpiece in the case of prolonged welding operations.

  • Page 6: Installation

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH INSTALLATION DANGER! Lifting and positioning Read the warnings highlighted by the following symbols in the “General prescriptions for use”. 2.1 CONNECTIONS TO THE ELECTRICAL MAINS NETWORK The mains power supply features to which the equipment should be connected are given in chapter “12 TECHNICAL DATA”...

  • Page 7: Rear Panel

    Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 2.3 REAR PANEL ○ Remote control connector [Item 1]. ○ Connector for gas feed hose: gas flow from the cylinder to the power source [Item 2]. ○ Cooling unit power feeding connector [Item 3]. • Voltage: 230 V a.c. • Current output: 1.35 A • IP protection rating: IP20 (cap open) / IP66 (cap closed) DANGER! High voltage! If the socket is not connected to any devices always close the cap ○...

  • Page 8: Preparing For Mma Welding

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 2.4 PREPARING FOR MMA WELDING 1. Set the welding power source ON/OFF switch to “O” (unit switched off). 2. Plug the power cable plug into a mains socket outlet. 3. Choose the electrode based on the type of material and thickness of the workpiece to be welded. 4. Insert the electrode in the electrode holder. 5. Connect the electrode holder cable to the welding socket based on the polarity requested by the type of electrode used. 6. Connect the plug of the ground clamp to the welding socket on the basis of the polarity required. 7. Connect the earth clamp to the workpiece being processed.

  • Page 9: Preparing For Tig Welding

    Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 2.5 PREPARING FOR TIG WELDING NOTE: For the cooler to power source assembly procedure refer to the cooler instruction manual. 1. Set the welding power source ON/OFF switch to “O” (unit de-energized). 2. Plug the power cable plug into a mains socket outlet. 3. Connect the gas hose from the welding gas cylinder to the rear gas socket. 4. Open the cylinder gas valve. 5. Choose the electrode based on the type of material and thickness of the workpiece to be welded.

  • Page 10: User Interface

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH USER INTERFACE Discovery 221AC/DC Evo/VRD Evo - Discovery 300AC/DC Evo/VRD Evo Menu Menu E1/S5 MIX ac/dc MIX ac/dc DYN arc M-TACK Q-SPOT CODE SYMBOL DESCRIPTION DC TIG mode: illumination shows that the following parameter can be set: Q-START MIX ac/dc MIX ac/dc AC TIG mode: illumination shows that the following parameter can be set: MIX AC/DC DYN arc...
  • Page 11 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH CODE SYMBOL DESCRIPTION This LED illuminates to show that the following welding mode is selected: CONTINUOUS DC This LED illuminates to show that the following welding mode is selected: CONTINUOUS AC This LED illuminates to show that the following welding mode is selected: SYNERGIC PULSED DC TIG When this is on, it means that the synergic mode is active and that the operator can set just the welding current while the other parameters are automatically regulated by the machine. The synergy is optimised for angle welding. This LED illuminates to show that the following welding mode is selected: PULSED DC TIG This LED illuminates to show that the following welding mode is selected: PULSED AC TIG DC TIG mode: Press the button to select the DC TIG special functions. Possible choices: Q-START - DYNAMIC ARC - MULTI TACK - ELECTRODE DIAMETER AC TIG mode: Press the button to select AC TIG special functions. Possible choices: MIX AC - EXTRA FUSION - AC FREQUENCY – AC BALANCE - ELECTRO- DE DIAMETER Press the button to access the JOB MENU. AC TIG mode / DC TIG mode: This button selects the torch trigger procedure.

  • Page 12: Unit Power-Up

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH UNIT POWER-UP Set the welding power source ON/OFF switch to “I” to switch on the unit. The message appears on the following display: D1. FX.X = software version 300AC/DC 300AC/DC-VRD F.X.X F.X.X First power-up or power-ups following a RESET procedure The welding power source sets up for welding with the factory pre-sets. Subsequent power-ups The welding power source sets up for welding in the latest stable welding configuration that was active at the time of power-off. RESET (LOAD FACTORY SETTINGS) Menu Menu ACTIVATION SET-UP (14/15) ----------------------------------------------------- E1/S5 MIX ac/dc MIX ac/dc MAX CORR.UP SELECTION...
  • Page 13 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH PARTIAL RESET The reset procedure involves restoration of the parameter values and settings, except the following settings: - Settings of the SETUP menu. - Saved JOBS. TOTAL RESET The reset procedure involves complete restoration of the default values, parameters and memory set- tings set in the factory.

  • Page 14: Set Up (Initial Set-Up Of The Welding Power Source)

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH SET UP (INITIAL SET-UP OF THE WELDING POWER SOURCE) Menu Menu ACTIVATION SET-UP (1/15) E1/S5 ----------------------------------------------------- MIX ac/dc MIX ac/dc LANGUAGE SELECTION DYN arc COOLING TYPE M-TACK STARTING CURRENT Q-SPOT OUTPUT...
  • Page 15 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH HF CURRENT 20 A 200 A HF TIME 0.5 s 2.0 s 3.0 s PULSED TYPE SLOW FAST FAST PILOT ARC ENABLE READ I. TORCH TYPE PEDAL TYPE MAX CURR.
  • Page 16 Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH - STARTING CURRENT ○ The value of this parametercan be set as a percentage of the welding current or as an absolute value expressed in Amperes. - FINAL CURRENT ○ The value of this parameter can be set as a percentage of the welding current or as an absolute value expressed in Amperes. - HF CURRENT ○ This parameter establishes the current value during HF discharge. The value of this parameter can be set as an absolute value or in SYN. ○ With SYN setting the HF current value is calculated automatically on the basis of the pre-set weld- ing current value. Consequences of a higher value: • Arc striking is facilitated, even on very dirty workpieces. •...
  • Page 17 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH - MAX CURR. UP When the parameter is set to ON, the maximum value of the welding current that can be set with the UP / DOWN torch is the current set by the encoder in the front panel of the welding power source. When the parameter is set to OFF, the maximum value of the welding current that can be set with the UP / DOWN torch is the maximum current that can be supplied by the welding power source. - OPERATING HOUR COUNTER ○ The menu page shows the processing hour counters. • POWER ON = Total number of hours while the machine has been on (mains powered). • T.ARC ON = Total number of hours with welding arc on. • P.ARC ON = Partial number of hours with welding arc on. Keep the S5 button pressed for 3 seconds to reset the partial P.ARC ON. SET UP The reading is carried out as follows: 7 hours and (0.2x60) POWER ON...

  • Page 18: Alarm Management

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH ALARM MANAGEMENT S T O P This symbol is shown if an incorrect operating condition occurs. An alarm message appears on the following display: D1. Tab. 2 - Alarm messages MESSAGE MEANING EVENT CHECKS • Make sure that the power re- Overheating alarm quired by the welding process is Indicates tripping of the welding lower than the maximum rated power source thermal protection.
  • Page 19 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH MESSAGE MEANING EVENT CHECKS Torch button alarm Indicates that when the power • Make sure the torch trigger is source was powered up a short All functions disabled. not pressed, jammed, or short circuit was detected on the torch T O R C H...

  • Page 20: Mma Welding

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH MMA WELDING 8.1 MMA WELDING - FIRST LEVEL MENU Menu Menu SETTING E1/S5 MIX ac/dc MIX ac/dc SELECTION DYN arc M-TACK Q-SPOT Menu Menu ACTIVATION E1/S5 ○ Press the S4 button to activate the MMA mode.
  • Page 21 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH Tab. 3 - Parameters of the 1st level menu: MMA SETTING DEFAULT NOTES WELDING CURRENT MAX: Maximum value of welding 10 A 80 A MAX A MAXIMUM CURRENT WITH REMOTE CONTROLLER current HOT-START *SYn...

  • Page 22: Mma Welding -Second Level Menu

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 8.2 MMA WELDING -SECOND LEVEL MENU Menu Menu SECOND LEVEL (1/4) E1/S5 ----------------------------------------------------- MIX ac/dc MIX ac/dc ELECTRODE TYPE SETTING DYN arc M-TACK ARC VOLTAGE Q-SPOT OUTPUT Menu Menu ○...
  • Page 23 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH Tab. 4 - Parameters of the 2nd level menu: MMA mode SETTING DEFAULT NOTES bAS= basic rUt= rutile Crn= chromium/nick- ELECTRODE TYPE Only MMA ALU= aluminium MMA POLARITY The value is permanently OUTPUT VOLTAGE REDUCTION set to “ON” in VRD series...

  • Page 24: Mma Welding - Special Functions

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 8.3 MMA WELDING - SPECIAL FUNCTIONS Menu Menu SETTING E1/S5 MIX ac/dc MIX ac/dc DYN arc M-TACK Q-SPOT OUTPUT ○ Press the S1 button to activate the special function. - The setting to edit and its value are shown in the display D1. Menu Menu ○...

  • Page 25: Tig Welding

    Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH - Consequences of a higher value: • Arc concentration. • Reduction of heat-affected zone. • Slower melt speed. TIG WELDING 9.1 TIG WELDING - FIRST LEVEL MENU Menu Menu SELECTION E1/S5 MIX ac/dc MIX ac/dc SETTING DYN arc...
  • Page 26 Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH Tab. 6 - Parameters of the 1st level menu: TIG DC, CONTINUOUS and TIG AC mode: SETTING DEFAULT MAX USEFUL ADVICE PRE-GAS TIME 0.0 s 0.1 s 10.0 s Recommended value 0-3s 50 A...
  • Page 27 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH For a better understanding of the parameter functions described in the table, refer to the following diagram. (I1) WELDING CURRENT (I2) BASE CURRENT (I3) FINAL CURRENT (I4) STARTING CURRENT (t1) UP SLOPE TIME (t2) PEAK TIME (t3) BASE TIME...
  • Page 28 Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH - SECOND CURRENT B-LEVEL ○ With a rapid press and release (less than 0.5 seconds) of the torch trigger during welding, the out- put current value switches to the value set by means of the “B-level second current” parameter. ○ This function makes it possible to avoid interrupting the welding process when the geometry of the workpiece changes; alternatively, the welding current can be reduced to decrease heating of the part if it becomes too hot during execution of the welding process. ○ In DC TIG welding, the parameter is useful when welding different gauge workpieces during the same pass; when moving between different gauges the output current can be changed simply by pressing the torch trigger. - BASE CURRENT ○ Pulsed wave minimum current. - Consequences of a higher value: •...
  • Page 29 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH - FINAL CURRENT ○ During electrode welding the parameter makes it possible to obtain a uniform deposit of filler ma- terial from the start to the end of the welding process, closing the deposition crater with a current such as to deposit a final droplet of filler material. ○ The value of this parameter can be set as a percentage of the welding current or as an absolute value expressed in Amperes. ○ The parameter is displayed but it is not used during the welding process when the following set- ting is present: MULTI TACK = ON ○ By keeping the torch trigger pressed during the 3rd time, the crater filler current is maintained thereby ensuring optimal crater filling, until the post gas time is started by releasing the torch trig- ger (4th time). - POST GAS TIME ○ Time of post gas delivery when the welding arc is extinguished. - Consequences of a higher value: •...

  • Page 30: Tig Welding - Second Level Menu

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 9.2 TIG WELDING - SECOND LEVEL MENU Menu Menu ACTIVATION SECOND LEVEL (1/2) E1/S5 ----------------------------------------------------- MIX ac/dc MIX ac/dc HF STRIKE SELECTION DYN arc REMOTE CONTROL SETTING M-TACK Q-SPOT OUTPUT...
  • Page 31 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH Tab. 8 - Parameters of the 2nd level menu: DC TIG mode SETTING DEFAULT MAX NOTES SPOT TIME 0.01s 0.01s 10.0s Solo con 2 Tempi SPOT Only with 2 STROKE SPOT PAUSE TIME 0.01s OFF 10.0s...
  • Page 32 Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH SINUSOIDAL WAVE: ○ Benefits: • Good energy transmitted on the weld workpiece. • Appearance of a bright, clean weld bead. • Good execution speed and optimum penetration. • Low level of welding arc noise. ○ Disadvantages: • Slightly lower performance than with a Square wave. TRIANGULAR WAVE: ○ Benefits: • Low energy transmitted to the weld workpiece and therefore suitable for materials or alloys with low melting points.
  • Page 33 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH HF ARC IGNITION PROCEDURE Position the tungsten electrode on the ignition point, so that there is a distance of about 2-3mm between the electrode and the workpiece Press the torch button according to the mode selected. The voltaic arc ignites without touching the weld workpiece. • LIFT-ARC: This type of arc blow is derived from a short low-amperage circuit (to avoid elec- trode damage) that the operator created between the electrode tip and the workpiece and the consequent rise of the electrode tip that maintains the current flow by creating the so-called electric arc. It is advisable to use LIFT-ARC priming in applications such as maintenance of machinery in operation, welding close to printed circuits or soldering near computers.

  • Page 34: Tig Dc Welding - Special Functions Menu

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 9.3 TIG DC WELDING - SPECIAL FUNCTIONS MENU Menu Menu SETTING E1/S5 MIX ac/dc MIX ac/dc DYN arc M-TACK Q-SPOT OUTPUT ACTIVATION ○ Press the S1 button to activate the special function.
  • Page 35 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH Tab. 12 - Special functions in DC TIG mode - summary of the combinations MODE→ PROCEDURE ↓ with MULTI- TACK > 0 s DYN arc M-TACK M-TACK M-TACK with remote M-TACK control...
  • Page 36 Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH Tab. 13 - Recommended Q-START parameters CORNER/BUTT JOINT Sheet thickness (mm) Current (A) Q start value (seconds) 35A - 50A 1.0mm 2.0mm 50A - 80A 0.5 - 1.0 3.0mm 80A - 140A 4.0mm...
  • Page 37 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH Tab. 14 - Recommended DYNAMIC ARC parameters ANY TYPE OF JOINT Sheet thickness (mm) Current (A) DnyArc Value (Amperes) 1.0 mm 35A - 50A 5 - 10 2.0 mm 50A - 80A 10 - 15...
  • Page 38 Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 170A - 180A 1.0 - 1.5 3.0 mm 180A - 200A 1.5 - 2.0 ○ It is recommended that a preflow time of between 0.3 - 0.5 seconds be used in order to have optimum protection right from the start, thus avoiding the oxidation of the initial part of the weld. This is also the same for the final part where it is recommended that a post gas time of not less than 3 seconds is used. - ELECTRODE DIAMETER ○ The parameter optimizes the DC TIG welding arc strike on the basis of the diameter of the chosen electrode.

  • Page 39: Tig Ac Welding - Special Functions Menu

    Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 9.4 TIG AC WELDING - SPECIAL FUNCTIONS MENU Menu Menu SETTING E1/S5 MIX ac/dc MIX ac/dc DYN arc M-TACK Q-SPOT OUTPUT ACTIVATION ○ Press the S1 button to activate the special function. - The setting to edit and its value are shown in the display D1.
  • Page 40 Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH - MIX AC ○ This feature allows you to vary the welding current alternating a TIG AC weld with a TIG DC weld -. This allows the effectiveness of the TIG AC welding to combine with the penetration of the TIG DC welding, obtaining high welding speeds and creating more quickly the weld pool for cold-piece welding. ○ It is also possible to weld thicker gauges with modest amperages since the DC- portion is much higher than using a completely AC waveform. ○ The operator adjustable parameter is the percentage of AC wave compared to the DC- wave over the entire period ranging from 10% to 80%. - Consequences of a higher value: •...
  • Page 41 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH - EXTRA FUSION ○ This feature allows for a move towards the negative side waveform with respect to zero. It is therefore possible to create a penetrating and precise weld pool, which will allow for very thin gauge sheets to be welded using an electrode tip comparable to that of an electrode for TIG DC welding -.
  • Page 42 Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH - AC INVERSION FREQUENCY ○ The frequency in TIG AC is the number of inversions by DC + to DC- as a unit of time (T1) and adjusted in Hertz (Hz). The reduction in the frequency value of the electric arc inversion tends to widen its size, therefore it is advisable to use low frequencies for the welding of relatively large thicknesses or for filling passes in multipass bevels. Conversely, in increasing the inversion fre- quency value, the arc size tends to decrease and therefore increases the concentration of the pool and the precision of the welding. It is therefore advisable to use high values of frequency for the welding of very thin thickness or for facings on edges of moulds - Consequences of a higher value: • Arc concentration. • Reduction of heat-affected zone. • Slower melt speed. INVERSION FREQUENCY LOW FREQUENCY T1 (s) T1(s)
  • Page 43 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH - AC BALANCE ○ This parameter establishes the positive wave vs. negative wave time ratio. The following figure shows graphs with waves with different AC balance values: “0” BALANCE represents the optimum ratio between “Cleanliness and Penetration” “+” BALANCE represents the curve of the current curve with an AC Balance with a positive value (cleaner); in this case the percentage of the positive wave is greater than the negative one. “-” BALANCE represents the curve of the current with a negative value AC balance (more penetration) in which it can be seen that there is a low percentage of positive wave when compared with the negative. - Consequences of a higher value: •...

  • Page 44: Torch Trigger Procedure

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 10 TORCH TRIGGER PROCEDURE Menu Menu E1/S5 MIX ac/dc MIX ac/dc DYN arc M-TACK Q-SPOT SELECTION Menu Menu ○ Press the S3 button to select the desired PULSED TORCH mode. E1/S5 2 STROKE 4 STROKE...
  • Page 45 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH Tab. 16 - Pulsed Torch button mode table. → PROCEDURE ↓ Q-SPOT Q-SPOT MODE 2T HF 4T HF 4T B-L 4T B-L HF 2T Q-SPOT 2T Q-SPOT HF √...
  • Page 46 Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH - 2 STROKE + HF ○ Bring the torch up to the work until the electrode tip is approximately 2 or 3 mm away. ○ Press (1T) and keep the torch trigger pressed. ○ The arc strikes without contact with the workpiece and the voltage discharges (HF) cease auto- matically. ○ The welding current reaches the pre-set value, by way of an up slope time, if programmed. ○ Release (2T) the trigger to start the weld completion procedure. ○ The current reaches the end current value in the time set in the down slope time parameter. ○ The arc is extinguished. ○...
  • Page 47 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH - 4 STROKE LIFT: ○ Touch the workpiece with the torch electrode. ○ Press (1T) and keep the torch trigger pressed. ○ Slowly lift the torch to strike the arc. ○ The arc strikes, the welding current assumes the pilot current value. (if activated from the SET UP menu.) ○ Release (2T) the torch trigger. ○...
  • Page 48 Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH - 4 STROKE + HF ○ Bring the torch up to the work until the electrode tip is approximately 2 or 3 mm away. ○ Press (1T) and keep the torch trigger pressed. ○ The arc strikes without contact with the part and the voltage discharges (HF) cease automatically, the welding current will assume the pilot current value. (if activated from the SET UP menu.) ○ Release (2T) the torch trigger. ○ The welding current reaches the pre-set value, by way of an up slope time, if programmed. ○...
  • Page 49 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 4 STROKE B-LEVEL LIFT: ○ Touch the workpiece with the torch electrode. ○ Press (1T) and keep the torch trigger pressed. ○ Slowly lift the torch to strike the arc. ○ The arc strikes, the welding current assumes the pilot current value. (if activated from the SET UP menu.) ○ Release (2T) the torch trigger. ○ The welding current reaches the pre-set value, by way of an up slope time, if programmed. ○...
  • Page 50 Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH - 4 STROKE B-LEVEL: ○ Bring the torch up to the work until the electrode tip is approximately 2 or 3 mm away. ○ Press (1T) and keep the torch trigger pressed. ○ The arc strikes without contact with the part and the voltage discharges (HF) cease automatical- ly, the welding current will assume the pilot current value. (if activated from the SET UP menu.) ○ Release (2T) the torch trigger. ○ The arc strikes without contact with the workpiece and the voltage discharges (HF) cease automatically.

  • Page 51: Stroke Spot - Q-Spot Function

    Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 10.1 2 STROKE SPOT - Q-SPOT FUNCTION Menu Menu ACTIVATION E1/S5 MIX ac/dc MIX ac/dc SELECTION/ DYN arc SETTING M-TACK Q-SPOT ACTIVATION OUTPUT ○ Press the S3 button to select the TORCH 2 STROKE SPOT BUTTON mode.
  • Page 52 Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH - Q-SPOT: ○ This function, only present in 2 STROKE SPOT, facilitates spot-welding: • It allows the exact positioning of the electrode at the point to be joined. The electrode is con- veniently placed at the desired location. • Only after lifting of the electrode, the machine emits pulse welding for the stipulated time. • It considerably reduces the risk of contamination of the joint with the electrode. • While pressing the torch button, the process may be repeated as many times as required. ○...
  • Page 53 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH - 2 STROKE SPOT HF: ○ Bring the torch up to the work until the electrode tip is approximately 2 or 3 mm away. ○ Press (1T) the torch trigger. ○ The arc strikes without contact with the workpiece and the voltage discharges (HF) cease auto- matically. ○ Release (2T) the torch trigger. ○ The welding current reaches the pre-set value, by way of an up slope time, if programmed. ○ The welding procedure continues, at the pre-set current, for the time set with the spot time pa- rameter. ○...
  • Page 54 Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 1. Position the torch 2. Press the torch Lift torch 4. The arc ignites for 5. The result of this with the electrode on trigger and keep it slightly. A few hundredths of is a very precise, the workpiece.
  • Page 55 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH Tab. 19 - Table showing enabled Welding Parameters MODE → MENU PROCEDURE Q-SPOT Q-SPOT Q-SPOT ↓ → PARAMETER ↓ WELDING 1° √ √ √ √ √ √ √...
  • Page 56 Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH Tab. 19 - Table showing enabled TIG AC Welding Parameters MODE → MENU PROCEDURE Q-SPOT Q-SPOT ↓ → PARAMETER ↓ WELDING CURRENT 1° 1° HOT-START 1° ARC-FORCE PRE-GAS TIME 1°...

  • Page 57: Jobs Management

    Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 11 JOBS MANAGEMENT Personalised welding settings, or JOBs, can be saved in memory locations and subsequently uploaded. Up to 50 JOBS can be saved (j01-j50). JOBs can be managed only when the unit is not in welding mode. The SETUP menu settings cannot be saved by means of the JOBs. When a JOB is loaded and an UP/DOWN torch is installed, press the torch triggers to select the saved JOBS. If there are no JOBS loaded, the UP/DOWN buttons on the torch serve to adjust the welding current. 11.1 SAVING A JOB Menu Menu SELECTION JOB MENU E1/S5 ----------------------------------------------------- MIX ac/dc MIX ac/dc CONFIRMATION --->> SAVE DYN arc MENU to confirm M-TACK...

  • Page 58: Deleting A Job

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 11.2 DELETING A JOB Menu Menu SELECTION JOB MENU E1/S5 ----------------------------------------------------- MIX ac/dc MIX ac/dc --->> DELETE CONFIRMATION DYN arc MENU to confirm M-TACK Q-SPOT ACTIVATION OUTPUT ○...

  • Page 59: Loading A Job

    Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 11.3 LOADING A JOB Menu Menu SELECTION JOB MENU E1/S5 ----------------------------------------------------- MIX ac/dc MIX ac/dc --->> LOAD CONFIRMATION DYN arc MENU to confirm M-TACK Q-SPOT ACTIVATION OUTPUT ○...

  • Page 60: Exporting/Importing Jobs (Through A Usb Memory Stick)

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 11.4 EXPORTING/IMPORTING JOBs (through a USB memory stick) By using a USB memory stick, the JOBs saved on the panel can be exported and imported into another panel. When a USB memory stick is connected, the JOB MENU will display the items related to the importing and exporting procedure. WARNING! The JOBs are exported to the USB memory stick with the name of the location where they are saved on the panel. If the file names of the JOBs saved onto the USB memory stick are changed by using a PC, after they are imported into the destination panel, they will still be saved in their original location. This means that, if the destination panel already contains JOBs saved in the same location as those exported to the memory stick, they will be overwritten. We recommend not to change the name of the files exported to the USB memory stick. The file extension (.bin) must never be changed.
  • Page 61 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH Menu Menu ○ Use the encoder E1 , to select USB EXPORT. Menu Menu ○ Press the S5 button to confirm. - Wait for the JOB export procedure to terminate. ○...

  • Page 62: Selecting Jobs Using The Torch Buttons

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH Menu Menu ○ Use the encoder E1 to select USB IMPORT. Menu Menu ○ Press the S5 button to confirm. - Wait for the JOB import procedure to terminate. - If no valid JOB file is present, the “IMPORT FAILED” message is displayed ○...

  • Page 63: Technical Data

    Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 12 TECHNICAL DATA Waste electrical and electronic equipment (WEEE) Electromagnetic compatibility (EMC) Directives applied Low voltage (LVD) Restriction of the use of certain hazardous substances (RoHS) Construction standards EN 60974-1; EN 60974-3; EN 60974-10 Class A Equipment compliant with European directives in force Equipment suitable in an environment with increased hazard of electric shock Conformity markings Equipment compliant with WEEE directive Equipment compliant with RoHS directive...

  • Page 64: Discovery 221Ac/Dc Evo

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 12.1 DISCOVERY 221AC/DC EVO Supply voltage 1 x 230V ~± 15 % / 50-60 Hz Mains protection 25 A Delayed Compliant with EN 61000-3-12 Zmax Hook-up not dependent on the supply network Dimensions ( L x D x H ) 460 x 230 x 325 mm Weight 19 kg Insulation class...

  • Page 65: Discovery 300Ac/Dc Evo

    Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 12.2 DISCOVERY 300AC/DC EVO Supply voltage 3 x 400 Va.c. ± 15 % / 50-60 Hz Mains protection 20 A Delayed This equipment complies with IEC 61000-3-12 provided that the maximum permis- sible system impedance is less than or equal to 55 mΩ at the interface point between the user’s supply and the public system. Zmax It is the responsibility of the installer or user of the equipment to ensure, by consulta- tion with the distribution network operator if necessary, that the equipment is con- nected only to a supply with maximum permissible system impedance less than or equal to 55 mΩ...

  • Page 66: Electrical Diagram

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 13 ELECTRICAL DIAGRAM 13.1 DISCOVERY 221AC/DC EVO 9 8 7 6 4 3 2 1...

  • Page 67: Discovery 300Ac/Dc Evo

    Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 13.2 DISCOVERY 300AC/DC EVO...

  • Page 68: Torch Connector (Front Panel)

    Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 13.3 TORCH CONNECTOR (front panel) INTERNAL VIEW cod. 021.0004.3360 Torch UP/DOWN torch UP & DOWN T ORCH TORCH P. T. P. T. P. T. P. T. N.C. N.C.

  • Page 69: Spare Parts

    Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 14 SPARE PARTS 14.1 DISCOVERY 221AC/DC EVO...
  • Page 70 Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH N° CODE DESCRIPTION N° CODE DESCRIPTION 014.0002.0002 KNOB 41 011.0008.0029 LATERAL PLATE FRONT PANEL LABEL (221AC/DC 42 015.0001.0006 HEAT SINK 013.0012.1701 EVO) (221AC/DC-VRD EVO) 43 041.0004.0301 HALL SENSOR COMPLETE LOGIC FRONT PA- AMPHENOL CONN.

  • Page 71: Discovery 300Ac/Dc Evo

    Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH 14.2 DISCOVERY 300AC/DC EVO...
  • Page 72 Cod. 006.0001.2000 Discovery 221AC/DC Evo/VRD Evo 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH N° CODE DESCRIPTION N° CODE DESCRIPTION 014.0002.0002 KNOB 43 041.0004.0301 HALL SENSOR FRONT PANEL LABEL (300AC/DC 44 050.0001.0076 AMPHENOL CONN. BOARD 013.0012.1801 EVO) (300AC/DC-VRD EVO) 45 011.0002.0036 SOLENOID VALVE BLOCK 050.0003.0038 DIODE BRIDGE BOARD...
  • Page 73 Discovery 221AC/DC Evo/VRD Evo Cod. 006.0001.2000 08/03/2022 V.2.2 Discovery 300AC/DC Evo/VRD Evo ENGLISH N° CODE DESCRIPTION TORCH CONNECTORS COMPLETE 021.0000.0001 SLEEVE HOSE ADAPTER FOR 016.5001.0822 RUBBER HOSE 016.0007.0001 HOSE CLAMP Ø=11-13 016.0007.0709 HOSE CLAMP Ø=07-09 SLEEVE HOSE ADAPTER FOR 016.5001.0821 RUBBER HOSE M10 AMPHT3360-001 M/5V.
  • Page 74 Cod. 006.0001.2000 08/03/2022 V.2.2 www.weco.it...

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