Weco Discovery 300 AC/DC User manual

Cod.006.0001.1840
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ENGLISH
WECO srl
Via S. Antonio, 22 - BE VEDERE
36056 TEZZE SU BRENTA (VICENZA) ITA Y
Tel.[phone] – Fax [phone]
www.weco.it - E-mail [e-mail]
Discovery 300 AC/DC
Instruction manual
GB

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1 INTRODUCTION ................................................................. 4
2 FRONT ANEL ................................................................... 4
3 REAR ANEL ..................................................................... 5
4 INSTALLATION .................................................................. 5
4.1 CONNECTIONS TO THE E ECTRICA MAINS NETWORK 5
4.2 PREPARING FOR MMA WE DING ..................................... 5
4.3 PREPARING FOR TIG WE DING ....................................... 6
5 USER INTERFACE ............................................................. 8
6 UNIT OWER-U ............................................................... 9
7 RESET (LOAD FACTORY SETTINGS) ............................... 9
7.1 PARTIA RESET................................................................. 9
7.2 TOTA RESET .................................................................. 10
8 SET-U (INITIAL SET-U OF THE WELDING OWER
SOURCE) ......................................................................... 10
8.1 TORCH OADING ............................................................. 12
9 ALARMS MANAGEMENT ................................................. 12
THERMA A ARM! ...............................................................................12
COO ING DEVICE A ARM..................................................................12
10 WELDING ARAMETERS ................................................ 13
Welding current ......................................................................................13
Max welding current...............................................................................13
Hot-start ..................................................................................................13
Arc-force..................................................................................................13
VRD .........................................................................................................13
ong arc voltage.....................................................................................13
Remote control .......................................................................................13
Dynamic arc ............................................................................................13
Second current Bi-level .........................................................................13
Base current ...........................................................................................13
Peak time ................................................................................................14
Base time ................................................................................................14
Pulse frequency......................................................................................14
Slope down .............................................................................................14
Final current ............................................................................................14
Post-gas ..................................................................................................14
Pre-gas....................................................................................................14
Start current ............................................................................................14
Slope up ..................................................................................................14
Spot TIG time .........................................................................................14
HF arc start .............................................................................................14
Minimum pedal current ..........................................................................14
Q-start .....................................................................................................14
Multi-tack.................................................................................................14
AC wave in mix AC-DC .........................................................................14
Extra fusion .............................................................................................14
AC frequency ..........................................................................................15
AC balance .............................................................................................15
Electrode diameter .................................................................................15
10.1 PARAMETERS ACTIVATION ............................................ 16
11 WELDING SETTINGS ....................................................... 18
11.1 E ECTRODE WE DING (MMA) ........................................ 18
11.1.1 MMA PARAMETERS SETTING (1ST EVE ) ...................................18
11.1.2 MMA PARAMETERS SETTING (2ND EVE )...................................18
11.1.3 MMA SPECIA FUNCTIONS ...............................................................18
11.2 DC TIG WE DING ............................................................. 19
11.2.1 DC TIG PARAMETERS SETTING (1ST EVE ) ...............................19
11.2.2 DC TIG PARAMETERS SETTING (2ND EVE ) ..............................19
11.2.3 DC TIG SPECIA FUNCTIONS MENU ...............................................20
11.3 AC TIG WE DING ............................................................. 21
11.3.1 AC TIG PARAMETERS SETTING (1ST EVE ) ...............................21
11.3.2 AC TIG PARAMETERS SETTING (2ND EVE )...............................21
11.3.3 AC TIG SPECIA FUNCTIONS MENU ...............................................22
12 JOBS MANAGEMENT ...................................................... 23
12.1 SAVING A JOB ................................................................. 23
12.2 OADING A USER JOB OF FACTORY SET JOB .............. 23
12.3 DE ETING A JOB ............................................................. 23
13 TORCH TRIGGER MODES ............................................... 24
13.1 2T IFT-ARC WE DING .................................................... 24
13.2 2T HF WE DING ............................................................... 24
13.3 4T IFT-ARC WE DING..................................................... 24
13.4 4T HF WE DING ............................................................... 25
13.5 BI- EVE IFT WE DING .................................................. 25
13.6 BI- EVE HF WE DING .................................................... 25
13.7 2T SPOT WE DING........................................................... 25
13.8 2T SPOT HF WE DING ..................................................... 26
13.9 PI OT ARC WE DING ....................................................... 26
14 TECHNICAL DATA............................................................ 27
15 S ARE ARTS ................................................................. 28
16 ELECTRICAL DIAGRAM ................................................... 30
16.1 DISCOVERY 300 AC/DC ................................................... 30
16.2 TORCH CONNECTOR....................................................... 32
16.3 REMOTE CONTRO ER CONNECTOR ............................ 32

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1INTRODUCTION
IM ORTANT!
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.
The meaning of the symbols in this manual and the associated
precautionary information are given in the "General
prescriptions for use”.
If the "General prescriptions for use" are not present, it is
mandatory to request a replacement copy from the manufacturer
or from your dealer.
Retain these documents for future consultation.
KEY
This symbol identifies an action that occurs automatically as a
result of a previous action.
This symbol identifies additional information or a reference to
a different section of the manual containing the associated
information.
§ This symbol identifies a reference to a chapter of the manual.
This symbol accompanies important information concerning
the execution of the relevant operations.
Discovery 300 AC/DC is an advanced technology single-phase
welding power source for AC and DC TIG welding operations.
AC TIG functions are ideal for aluminum, 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 ignition selection located on the front panel, it
modifies the ignition according to electrode diameter.
−Extra fusion function maximizes arc focusing for considerable thin
material in AC TIG welding.
−Mixed AC/DC increases arc penetration for thick aluminum plates.
−Pulsed AC TIG mode which prevents the risk of deformation of the
workpiece in the case of prolonged welding operations.
Up to 4,00mm diameter electrode welding is possible in MMA.
The fan is turned on only during welding, at the end of the welding
process it remains on for a fixed period of time according to welding
conditions.
The fan is nonetheless controlled by specific thermal sensors that
guarantee a correct cooling of the machine.
The welding modes and procedures available are those indicated in
the table.
MODE ROCEDURE
MMA
TIG DC
CONTINUOUS
2 STEP IFT
-
ARC (2T)
2 STEP SPOT (2T-SPOT)
+
PU SED DC TIG +
2 STEP + HF (2T HF)
2 STEP HF SPOT (2T-SPOT
HF)
+
TIG DC SYNERGIC
4 STEP IFT-ARC (4T)
+ 4 STEP + HF (4T HF)
TIG AC
CONTINUOUS
4 STEP BI
-
EVE (4T B
-
EVE )
+
PU SED AC TIG +
4 STEP BI- EVE + HF (4T B-
EVE HF)
Accessories that can be connected to the unit:
−manual remote controller for remote adjustment of the welding
current.
−foot-pedal remote controller for TIG torch arc striking and remote
adjustment of welding current.
−UP/DOWN torch or torch with potentiometer.
−liquid cooler for TIG torches.
2FRONT ANEL
1 4 3 2
1: Negative pole welding socket.
2: Positive pole welding socket.
3: Connector for logic signals of TIG torch.
4: Connector for gas feed hose:
power source  torch

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3REAR ANEL
2 3 1
4 5
1: Welding power source ON/OFF switch.
2: Remote controller connector.
3: Connector for gas feed hose:
cylinder  power source
4: Power cable.
Total length
(including internal part) 3,5 m
Number and cross section of wires
4
x 2,5 mm
2
Type of plug supplied
Not supplied
5: Cooler power feeding connector.
Voltage
230 V~
Current output
1.35 A
IP protection rating
IP20 (cap open)
IP66 (cap closed)
WARNING!
High voltage!
If the socket is not connected to any devices always close the cap:
presence of hazardous voltage levels!
4INSTALLATION
WARNING!
Lifting and positioning
Read the warnings highlighted by the following symbols in the
“General prescriptions for use”.
4.1 CONNECTIONS TO THE ELECTRICAL MAINS
NETWORK
The characteristics of the mains power supply to which the equipment
shall be connected are given in the section entitled “technical data” on
page 27.
The machine can be connected to motorgenerators provided their
voltage is stabilised.
Connect/disconnect the various devices with the machine switched
off.
4.2 RE ARING FOR MMA WELDING
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. 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 clamp plug to the following welding
socket: Positive pole welding socket.
6. Connect the earth clamp plug to the following welding socket:
Negative pole welding socket.
7. Connect the earth clamp to the workpiece being processed.
WARNING!
Electric shock hazard!
Read the warnings highlighted by the following symbols in the
“General prescriptions for use”.
8. Set the welding power source ON/OFF switch to “I” (unit
powered).
9. Select the following welding mode on the user interface: MMA
10. Set the required welding parameter values on the user interface.
When the remote controller [RC] is connected and the relative
locking screw is tightened, welding current can be adjusted using
the remote controller.
The system is ready to start welding.

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4.3 RE ARING FOR TIG WELDING
Installation with cooling unit
1. Set the welding power source ON/OFF switch to “O” (unit de-
energized).
2. Remove the screws from the power source cabinet.
3. oosen the screws of the upper brackets of the cooler and open
out the brackets slightly.
4. Place the power source on top of the cooler.
5. Secure the cooler brackets to the power source using the
previously removed screws.
6. Connect the plug of the cooler power cable to the cooler power
socket on the rear panel of the welding power source.
7. Set the cooler ON/OFF switch to “I” (unit powered).
8. Plug the power cable plug into a mains socket outlet.
9. Connect the gas hose from the welding gas cylinder to the rear
gas socket.
10. Open the cylinder gas valve.
11. Connect the gas hose from the welding torch to the front gas
socket.
12. Connect the torch plug to the welding socket on the basis of the
polarity required by the type of electrode in question.
13. Choose the electrode based on the type of material and thickness
of the workpiece to be welded.
14. Insert the electrode in the TIG torch.
15. Connect the plug of the ground clamp to the welding socket on the
basis of the polarity required.
16. Connect the earth clamp to the workpiece being processed.
17. Set the welding power source ON/OFF switch to “I” (unit
powered).
18. Select the following welding mode on the user interface: TIG DC /
TIG AC
19. Press the torch trigger with the torch well clear of any metal parts.
This serves to open the gas solenoid valve without striking the

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welding arc.
20. Use the flow control valve to adjust the flow of gas as required
while the gas is flowing out.
21. Set the required welding parameter values on the user interface.
When the remote control pedal is connected and the relative
locking screw is tightened the welding current will vary in relation
to the pressure exerted on the pedal.
The system is ready to start welding.

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5USER INTERFACE
CODE
SYMBOL
DESCRI TION
1
DC TIG mode: Illumination shows that the following function has been activated: Q-START
AC TIG mode: Illumination shows that the following function has been activated: AC WAVE IN MIX AC-DC
2
DC TIG mode:
Illumination shows that the following function has been activated: DYNAMIC ARC
AC TIG mode:
Illumination shows that the following function has been activated:
FUSIONE EXTRA
3
DC TIG mode: Illumination shows that the following function has been activated: MU TI TACK
AC TIG mode: When this ED illuminates the following parameter can be set: AC FREQUENCY
AC TIG mode: When this ED illuminates the following parameter can be set: AC TIG BA ANCE
AC TIG mode:
When this ED illuminates the following parameter can be set:
E ECTRODE DIAMETER
4
This ED illuminates to confirm the presence of power on the output sockets.
5
This ED illuminates to show an anomaly in the operating conditions.
See “A ARMS MANAGEMENT”(§ 9 page 12).
6
This ED illuminates to show that the following welding mode is selected: TIG
PU SED
7
DC TIG mode:
When this ED illuminates the following parameter can be set: TIG SYNERGIC PU SE
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 by angle welding.
8
Illumination shows that the following function has been activated: High frequency arc strike (HF)
9
This ED indicates that the current reference setting is impose
d by the remote controller.
10
Illumination shows that the following function has been activated: 2 times procedure
§ 13.1 page 24 / § 13.2 page 24
A flashing signal means the following function is activated: 2 times procedure
§ 13.7 page 26 / § 13.8 page 26
11
Illumination shows that the following function has been activated: 4 times procedure
§ 13.3 page 24 / § 13.4 page 25
12
Illumination shows that the following function has been activated: 4 times Bi
-
level procedure
§ 13.5 page 25 / § 13.6 page 25
13
This ED illuminates to show that the following welding mode is selected: MMA
14
This ED illuminates to show that the following welding mode is selected: TIG CONTINUOUS
15
This ED illuminates to show that the following welding mode is selected: AC TIG
D1
arameters/functions setting:
The displays show the value of the following parameter: WE DING CURRENT
Welding:
The
display shows the effective amperes value during welding.
HOLD function:
The display shows the latest measured current value.

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D2
Data setting: The display shows the various welding menus relative to the selected processes.
The display shows the selected parameter.
S1
AC TIG mode:
Press the button to select the parameter to be set. Possible choices:
Extra Fusion
AC Frequency
AC Balance
S2
Press the button once to open the JOB upload menu.
Hold down the button for 3 seconds to gain access to the JOB save/delete menu.
S3
Press the button once to select the parameters of the first level menu.
Hold down the button for 3 seconds to gain access to the second level menu.
Hold down the button at the time of power-on to gain access to the SETUP menu.
S4
This button selects the torch trigger procedure.
§ 13 page 24
S5
This button selects the welding mode.
E1
arameters/functions setting:
The encoder provides the facility to alter the selected parameter.
Welding:
The encoder allows the welding current to be modified.
6UNIT OWER-U
Set the welding
power source ON/OFF switch to “I” to switch on the unit.
300
AC/DC
Fx.x The message appears on the following displays: D2
x.x=
software version
First power
-
up or power
-
ups following a RESET procedure
The welding power source sets up for welding with the factory presets.
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.
7RESET (LOAD FACTORY SETTINGS)
The reset procedure involves complete restoration of the default values, parameters and memory settings set in the factory.
The reset procedure is useful in the following cases:
−Too many changes made to the welding parameters so user finds it difficult to restore defaults.
−Unidentified software problems that prevent the welding power source from functioning correctly.
7.1 ARTIAL RESET
The reset procedure involves restoration of the parameter values and settings, except the following settings:
−settings of the SETUP menu
−saved JOBS
−set language
Set the welding power source ON/OFF switch to “O” to switch the unit off.
S3
S5
Hold down both buttons simultaneously.
Set the welding power source ON/OFF switch to “I” to switch on the unit.
SIMU TANEOUS ACTIONS
RECALL ARTIAL SETU ?
The message appears on the following displays: D2
Exit without confirmation
Press any button (except S2).
This action will automatically close the menu.
Exit with confirmation
S3
Press the
button.
This action will automatically close the menu.
Wait for the memory clear procedure to terminate.

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7.2 TOTAL RESET
The reset procedure involves complete restoration of the default values, parameters and memory settings set in the factory.
All memory locations will be reset and hence all your personal welding settings will be lost!
Set the welding power source ON/OFF switch to “O” to switch the unit off.
S3
S5
Hold down both buttons simultaneously.
Set the welding power source
ON/OFF switch to “I” to switch on the unit.
SIMU TANEOUS ACTIONS
RECALL ARTIAL SETU ?
The message appears on the following displays: D2
E1
Select the following setting with the encoder:
RECALL FACTORY SETU ?
Exit without confirmation
Press any button (except S2).
This action will automatically close the menu.
Exit with confirmation
S3
Press the button.
MEMORY RESETTING NOW........
The message appears on the following displays: D2
This action will automatically close
the menu.
Wait for the memory clear procedure to terminate.
8SET-U (INITIAL SET-U OF THE WELDING OWER SOURCE)
Set the welding power source ON/OFF switch to “O” to switch the unit off.
S3
Hold down the button.
Set the welding power source
ON/OFF switch to “I” to switch on the unit.
SIMU TANEOUS ACTIONS
SET U
The message appears for a few seconds on the following displays: D2
SELECT LANGUAGE:
The message appears on the following displays: D2
S3
Use this button to scroll the
settings to edit.
E1
Using the encoder, edit the value of the selected setting.
Press any key (except S3) to save the setting and quit the menu.
Tab. 1 - Setup settings
SETTING
MIN
DEFAULT
MAX
SE ECT ANGUAGE:
ITA IANO
ENG ISH
FRANÇAIS
DEUTSCH
ESPAÑO
DUTCH
PORTUGUES
SUOMI
CESKY
PO SKI
DANSK
COO ER ACTIVATION
OFF
AUT
ON
START CURRENT
%
A
A
*1
FINA CURRENT
%
A
A
*1
CURRENT HF
20 A
SYN
30
0 A
HF TIME
0.5 s
2.0 s
3.0 s
KIND OF PU SE
S OW
(*2)
S OW
FAST (*3)
PI OT ARC
OFF
OFF
ON
*1: The value of this parameter can be set as a percentage of the welding current or as an absolute value expressed in Amperes.
*2: This setting enables slow pulsed mode.
*3: This setting enables fast pulsed mode.

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Cooler activation
−ON= The cooler is always running when the power source is switched on. This mode is preferable for heavy duty and automatic welding
procedures.
−OFF= The cooler is always disabled because an air-cooled torch is in use.
−AUT= When the unit is switched on the cooler is switched on for 16 s. During welding procedures the cooler runs constantly. When welding is
terminated the cooler continues to run for 90 s + a number of seconds equivalent to the average current value shown using the HO D
function.
Current HF
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 preset welding current value.
Consequences of a higher value:
−Arc striking is facilitated, even on very dirty workpieces.
−Risk of piercing excessively thin gauge workpieces.
ilot arc
The function enables the output of a low current between the 1st and 2nd times of the torch trigger to shield the mask in advance and avoid the
risk of blinding flashback caused by the welding current.

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8.1 TORCH LOADING
WARNING!
Make sure the torch in use is correctly sized in relation to the welding current required and for the available and selected cooling type. This
prevents the risk of burns to which the operator is potentially exposed, potential faults, and irreversible damage to the torch and the system.
If a torch is installed or replaced while the unit is running, the circuit of the newly installed must be filled with coolant to avoid the risk of damage
to the torch in the case of high voltage arc strikes without any liquid in the circuit.
ower-up with operation of the cooler set to "ON" or "AUT" mode
A check is performed automatically of the presence of liquid in the cooling circuit and the cooler is switched on for 15 seconds.
If the coolant circuit is full, the power source sets up in the most recent stable welding configuration.
If the coolant circuit is not full, all functions are inhibited and there will be no output power present.
COOLING DEVICE ALARM
The message appears on the following displays: D2
(any)
Press the button or torch trigger to repeat
the checking procedure for an additional 15 seconds.
If the problem persists rectify the cause of the alarm.
ower-up with operation of the cooler set to "OFF"
Operation of the cooler and the cooler alarm are disabled.
Welding is performed
without liquid cooling of the torch.
Torch change-over with operation of the cooler set to "ON"
Press and release the torch trigger.
This serves to start the cooler for 15 seconds to fill the torch cooling circuit.
9ALARMS MANAGEMENT
This ED
illuminates if an incorrect operating condition occurs.
An alarm message appears on the following display: D2
Tab. 2 - Alarm messages
MESSAGE
MEANING
EVENT
CHECKS
THERMA
A ARM!
Overheating alarm
Indicates tripping of the welding power
source thermal protection.
eave the unit running so that the
overheated components cool as rapidly as
possible.
When the unit has cooled, the welding
power source will reset automatically.
All functions disabled.
Exceptions:
-cooling fan.
-cooler (if switched on).
-
Make sure that the power required by the
welding process is lower than the maximum
rated power output.
-Check that the operating conditions are in
compliance with the welding power source
data plate specifications.
-Check for the presence of adequate air
circulation around the welding power source.
COO ING
DEVICE
A ARM
Cooler alarm
Indicates insufficient pressure in the torch
liquid cooling circuit.
All functions disabled.
Exceptions:
-cooling fan.
The alarm message persists on the display until the first operation is
performed on the user interface.
Cooler ON
: the alarm is signalled as long as the unit alarm is active and
the cooler presence signal persists.
Cooler OFF: the alarm is never signalled, irrespective of the
circumstances.
Cooler AUT: the alarm is signalled at the times in which the unit is
running; the alarm signal occurs as long as the unit presence signal
persists.
-Check that the connection to the cooler is
correct.
-Check that the O/I switch is set to I and that it
illuminates when the pump is running.
-Check that the cooler is filled with coolant.
-Check that the cooling circuit is liquid tight,
notably the torch hoses and the internal
connections of the cooler.

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10 WELDING ARAMETERS
For a better understanding of the parameter functions described in the table, refer to the following diagram.
(I1)
TIG WE DING CURRENT
(I2)
BASE CURRENT
(I3)
FINA CURRENT
(I4)
STARTING CURRENT
(t1)
UP S OPE TIME
(t2)
PEAK TIME
(t3)
BASE TIME
(t4)
DOWN S OPE TIME
(1/t2+t3)
PU SED CURRENT FREQUENCY
Welding current
Output current value during welding.
Max welding current
Maximum output current value that can be achieved with remote
controller external reference.
Hot-start
This parameter aids electrode melting at the time of arc striking.
Consequences of a higher value:
−Easier arc strike.
−Increased spatter at welding start.
−Increase of strike area.
Consequences of a lower value:
−More difficult arc strike.
−ess spatter at welding start.
−Smaller strike area.
Arc-force
This parameter helps to avoid electrode sticking during welding.
Consequences of a higher value:
−Fluidity during welding.
−Welding arc stability.
−Greater electrode fusion in workpiece.
−More welding spatter.
Consequences of a lower value:
−The arc is extinguished more easily.
−ess welding spatter.
VRD
This parameter reduces the potential across the welding sockets
when welding is not in progress.
The arc strike procedure is as follows:
−Touch the workpiece with the electrode tip.
−Raise the electrode.
Power is released for several seconds.
−Touch the workpiece with the electrode tip.
The welding arc will strike.
Long arc voltage
This parameter inhibits power output when the potential between
electrode and workpiece exceeds the preset threshold level.
Consequences of a higher value:
−The welding arc persits even with a significant distance between
the electrode and the workspiece.
Consequences of a lower value:
−Faster exit from weld.
Remote control
This parameter enables the unit to receive the current reference
signal from a remote control.
Dynamic arc
Welding power remains constant even when the distance between
electrode and workpiece changes.
Consequences of a higher value:
−The welding arc concentration remains unchanged.
−Prevents electrode sticking.
−Thin workpieces may become deformed more easily.
Second current Bi-level
With a rapid press and release (less than 0.5 seconds) of the torch
trigger during welding, the output current value switches to the value
set by means of the “bi-level second current” parameter.
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.
In AC TIG welding the parameter is useful to change the heat output
during welding; when the workpiece heats up to the point at which
there is a risk of deformation, the current value (= heat) can be
reduced simply by pressing the torch trigger.
Base current
Pulsed wave minimum current.
Consequences of a higher value:
−Faster creation of weld pool.
−Increase of heat-affected zone.

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eak time
Time for which the current pulse is at the maximum value.
Consequences of a higher value:
−Greater weld penetration.
−Facility to make deeper cuts.
Consequences of a lower value:
−Reduction of heat-affected zone.
−Difficult to create a weld pool.
Base time
Time during which current output is at the base value.
Consequences of a higher value:
−The filler material is spread more evenly.
−Increase of heat-affected zone.
ulse frequency
Consequences of a higher value:
−Slower melt speed.
−Reduction of heat-affected zone.
Slope down
Time during which the current changes from the welding value to the
end value by means of a slope.
Final current
During electrode welding the parameter makes it possible to obtain a
uniform deposit of filler material 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.
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 trigger (4Th
time).
ost-gas
Time of post gas delivery when the welding arc is extinguished.
Consequences of a higher value:
−More effective pickling (improved appearance of workpiece at the
end of the welding pass).
−Higher gas consumption.
Consequences of a lower value:
−ower gas consumption.
−Oxidation of electrode tip (more difficult arc strike).
re-gas
Time of gas delivery before the arc strike.
Consequences of a higher value:
−This parameter allows a shielded environment to be created,
thereby eliminating contaminants at the start of the welding pass.
Start current
Unit current output value immediately after the arc strike.
Slope up
Time during which the current changes from the starting value to the
welding value by means of a slope.
Spot TIG time
When the torch trigger is pressed the welding arc persists for the time
set in the parameter.
Press the torch trigger again to resume the welding process.
The arc strike procedure is as follows:
Positioning of the torch with the electrode on the workpiece.
Press the torch trigger and keep it pressed.
ift the torch slightly.
As soon as the electrode is lifted then the HF ignition starts.
The arc ignites for few hundredths of a second (time can be set up).
The result of this is a very precise, not oxidized welding spot without
any plastic deformation of the sheet.
HF arc start
This parameter enables the arc strike in the TIG welding procedure by
means of a high frequency (HF) current discharge.
The parameter prevents the inclusion of impurities at the start of the
weld pass.
This parameter can harm electronic boards when welding is
performed on equipment that incorporates such devices.
Minimum pedal current
Minimum output current value with foot pedal controller external
reference.
The current is set as a percentage with respect to the "maximum foot
pedal current" parameter.
Q-start
This parameter allows the unit to start in synergic pulsed TIG mode
for the preset time interval, before switching automatically to the
welding procedure selected on the interface panel.
The parameter creates a weld pool faster with respect to the standard
starting procedure.
This parameter is useful when spot welding thin gauge sheet.
Multi-tack
This parameter allows thin gauge sheet to be welded without
deformation.
Consequences of a higher value:
−Welding of thinner gauge sheet without deformation.
−ess melting of material, slower welding process.
AC wave in mix AC-DC
This parameter serves to set the AC wave percentage with respect to
the DC current output.
Consequences of a higher value:
−Greater weld penetration.
−ess deformation.
−Faster creation of the weld pool.
−Reduced cleanliness of the workpiece.
−oss of arc.
Extra fusion
This parameter establishes the percentage of the positive current
wave (pickling) that is subtracted and added to the negative current
(fusion).

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The following picture shows the positive wave interval ∆I that, if
subtracted and added to the negative wave, forms the new form of
broken line wave.
Consequences of a higher value:
−Tighter arc.
−Greater weld penetration.
−Reduced pickling.
−oss of arc.
−ess deformation of the electrode.
AC frequency
The picture below shows the example where the wave on the second
graph has a double frequency compared with the first.
Consequences of a higher value:
−Arc concentration.
−Reduction of heat-affected zone.
−Reduction of heat-affected zone.
−Slower melt speed.
AC balance
This parameter establishes the positive wave vs. negative wave time
ratio.
The following figure shows two graphs with different balance value:
the first graph represents the curve of the current with a negative
value balance (more penetration) in which it can be seen that there is
a low percentage of positive wave compared with the negative.
In the second graph the current curve is shown with a positive value
balance (more cleaning); in this case the percentage of the positive
wave is greater than the negative one.
Consequences of a higher value:
−Greater weld penetration.
−ess cleanliness.
Electrode diameter
The parameter optimizes the AC TIG welding arc strike on the basis
of the diameter of the chosen electrode.

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10.1
ARAMETERS ACTIVATION
The welding parameters are available in accordance with the selected
welding mode and procedure.
Certain parameters are available only after other parameters or functions of the unit have been enabled or set.
The table shows the settings required to enable each parameter.
2: Available with "REMOTE CONTRO "= ON and remote
controller connected
5: Available with "KIND OF PU SE"= S OW
1
3

4



6
5
4
1
3

4


6
5
4
1
2
3

4


6
5
4
1
2
3

4


6
5
4
1
3

4

4
1
3

4
4
1
2
3

4
4
1
2
3

4
4
1: Available with the user interface reference active
4: Not available with "MU TI TACK" active
1
3

4



6
5
4
1
3

4


6
5
4
1
2
3

4


6
5
4
1
2
3

4


6
5
4
1
3

4



6
5
4
1
3

4


6
5
4
1
2
3

4


6
5
4
1
2
3

4


6
5
4
: always available
3: Available when "HF ARC START" parameter =ON
6: Available with "KIND OF PU SE"= FAST
1
3

4

4
1
3

4
4
1
2
3

4
4
1
2
3

4
4
1
2


MODE 
ROCEDURE 
ARAMETER 
WE DING CURRENT
MAX WE DING CURRENT
HOT-START
ARC-FORCE
PRE-GAS
START CURRENT
S OPE UP
SECOND CURRENT BI-
EVE
BASE CURRENT
PEAK TIME
PU SE FREQUENCY
BASE TIME
S OPE DOWN
MENU

1°
1°
1°
1°
1°
1°
1°
1°
1°
1°
1°
1°
1°

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

4









4









4
2









4
2









4









4









4

2









4
2









4



4

3


4

2



4
2

3


4

3 + 4


4

3 + 4
4
3


4

2



4
2

3 + 4
4
3


4

3 + 4


4

3 + 4
4
3


4

2



4
2

3 + 4
4
3




MODE 
ROCEDURE 
ARAMETER 
POST-GAS
VRD
ONG ARC VO TAGE
REMOTE CONTRO
FINA CURRENT
SPOT TIG TIME
MINIMUM PEDA
CURRENT
HF ARC START
AC WAVE + FORM
Q-START
DYNAMIC ARC
MU TI-TACK
AC WAVE IN MIX AC-DC
EXTRA FUSION
AC FREQUENCY
AC BA ANCE
E ECTRODE DIAMETER
MENU

1°
2°
2°
2°
2°
2°
2°
2°
2°
SPECIA
SPECIA
SPECIA
SPECIA
SPECIA
SPECIA
SPECIA
SPECIA

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11 WELDING SETTINGS
11.1 ELECTRODE WELDING (MMA)
S5
This
button serves to select the following welding mode:
MMA
11.1.1 MMA ARAMETERS SETTING (1ST LEVEL)
S3
Press this button to scroll the list of settings to edit.
The selected parameter and its value are shown on the following displays: D2
E1
Using
the encoder, edit the value of the selected setting.
The value is saved automatically.
Press any key (except S3) to save the setting and quit the menu.
Tab. 3 - Parameters of the 1st level menu in MMA mode
ARAMETER
MIN
DEFAULT
MAX
WE DING CURRENT
10 A
80 A
30
0 A
HOT
-
START
0 %
50 %
100 %
*1
ARC
-
FORCE
0 %
30 %
100 %
*1
*1: This parameter is set as a percentage referred to the value of the following parameter: WE DING CURRENT
11.1.2 MMA ARAMETERS SETTING (2ND LEVEL)
S3
Hold down the button for 3 seconds to gain access to the 2nd level menu.
L.2
The message appears on the following displays:
D1
.2= EVE .2= 2ND EVE MENU
The selected parameter and its value are shown on the following displays: D2
S3
Press
this button to scroll the list of settings to edit.
E1
Using the encoder, edit the value of the selected setting.
The value is saved automatically.
Press any key (except S3) to save the setting and quit the menu.
Tab. 4 - Parameters of the 2nd level menu in MMA mode
ARAMETER
MIN
DEFAULT
MAX
VRD
OFF
OFF
ON
*3
ONG ARC VO TAGE
37
SYN
65
*4
REMOTE CONTRO
OFF
OFF
ON
*2
*2: The activation is suitable for the following welding modes:
−MMA
−DC TIG
−AC TIG
Compatible remote control types:
−manual remote controller.
*3: The activation is suitable for the following welding modes:
−MMA
*4: SYN: This code indicates that parameters control is synergic. The optimal value of this parameter is set automatically by the microprocessor
on the basis of the preset welding current value. This value can be displayed but it is not user-adjustable.
11.1.3 MMA S ECIAL FUNCTIONS
S1
Press this button to scroll the list of settings to edit.
The selected parameter and its value are shown on the
following displays: D2
E1
Using the encoder, edit the value of the selected setting.
The value is saved automatically.
Press any key (except S1) to save the setting and quit the menu.

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Tab. 5 - Spe ial fun tions in MMA mode
ARAMETER
MIN
DEFAULT
MAX
DYNAMIC ARC
OFF
OFF
ON
11.2 DC TIG WELDING
S5
Use this button to select one of the following welding modes:
DC TIG
PU SED DC TIG
SYNERGIC PU SED DC T
IG
S4
Use this button to select
one of the following torch trigger procedures:
2 STEP
2T SPOT
4 STEP
4 STEP BI
-
EVE
11.2.1 DC TIG ARAMETERS SETTING (1ST LEVEL)
S3
Press this button to scroll the list of settings to edit.
The selected parameter and its value are shown on the
following displays: D2
E1
Using the encoder, edit the value of the selected setting.
The value is saved automatically.
Press any key (except S3) to save the setting and quit the menu.
Tab. 6 - 1st level menu parameters in DC TIG mode
ARAMETER
MIN
DEFAULT
MAX
WE DING CURRENT
5 A
80 A
300
A
MAX WE DING CURRENT
5 A
80 A
300
A
SECOND CURRENT BI
-
EVE
10 %
50 %
200 %
*1
BASE CURRENT
1 %
40 %
200 %
SYN
SYN
SYN
*3
PEAK TIME
0.1 s
5.0 s
5.0 s
*5
1 %
50 %
99 %
*4
SYN
SYN
SYN
*3
BASE TIME
0.1 s
5.0 s
5.0 s
*5
PU SE FREQUENCY
0.1 Hz
100 Hz
2.5 kHz
*4
0.1 Hz
5.0 Hz
5.0 Hz
*5
SYN
SYN
SYN
*3
S OPE DOWN
0.0 s
0.0 s
25.0 s
FINA CURRENT
5 %
5 %
80 %
*2
5 A
5 A
300
A
*2
POST
-
GAS
0.0 s
10.0 s
25.0 s
PRE
-
GAS
0.0 s
0.1 s
10.0 s
START CURRENT
2 %
50 %
200 %
5 A
50 A
300
A
S OPE UP
0.0 s
0.0 s
25.0 s
*1: This parameter is set as a percentage referred to the value of the following parameter: WE DING CURRENT
*2: The value of this parameter can be set as a percentage of the welding current or as an absolute value expressed in Amperes.
*3: SYN: This code indicates that parameters control is synergic. The optimal value of this parameter is set automatically by the microprocessor
on the basis of the preset welding current value. This value can be displayed but it is not user-adjustable.
*4: Available when "KIND OF PU SE" parameter= FAST
*5: Available when "KIND OF PU SE" parameter= S OW
11.2.2 DC TIG ARAMETERS SETTING (2ND LEVEL)
S3
Access the 2nd level menu by holding the button down for 3 seconds.
L.2
The message appears on the following displays: D1
.2= EVE .2= 2ND EVE MENU
S3
Press this button to scroll the list of settings to edit.
The selected parameter and its
value are shown on the following displays: D2
E1
Using the encoder, edit the value of the selected setting.
The value is saved automatically.
Press any key (except S3) to save the setting and quit the menu.
Tab. 7 - 2nd level menu parameters in DC TIG mode

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ARAMETER
MIN
DEFAULT
MAX
SPOT TIG TIME
0.01 s
0.1 s
10.0 s
HF ARC START
ON
ON
OFF
REMOTE CONTRO
OFF
OFF
ON
*1
MINIMUM PEDA CURRENT
1 %
50 %
90 %
*2
*1: The activation is suitable for the following welding modes:
−MMA
−DC TIG
−AC TIG
Compatible remote control types:
−manual remote controller.
−UP/DOWN or potentiometer TIG torch.
−foot pedal controller.
The maximum and minimum TIG welding current values can be set with the foot pedal controller.
The up slope and down slope cannot be controlled via the foot pedal.
The following welding procedures can be selected with the foot pedal:
+
+
2T IFT-ARC
2T HF
2T SPOT
2T SPOT + HF
If both remote controllers are connected, the foot pedal assumes priority over the UP/DOWN or potentiometer TIG torch.
When this function is active welding is performed without the following parameters:
−S OPE UP
−S OPE DOWN
−All special functions
*2: This parameter is set as a percentage referred to the value of the following parameter: WE DING CURRENT
11.2.3 DC TIG S ECIAL FUNCTIONS MENU
S1
Press this button to scroll the list of settings to edit.
The selected parameter and its value are shown on the following displays: D2
E1
Using the encoder, edit the value of
the selected setting.
The value is saved automatically.
Press any key (except S1) to save the setting and quit the menu.
Tab. 8 - Spe ial fun tions in DC TIG
ARAMETER
MIN
DEFAULT
MAX
DYNAMIC ARC
1 A
OFF
50 A
*3
Q
-
START
0.1 s
OFF
6
0.0 s
*3
MU TI
-
TACK
0.5 Hz
OFF
6.0 Hz
*2 *3
*2: When this function is active welding is performed without the following parameters:
−S OPE UP
−S OPE DOWN
−START CURRENT
−FINA CURRENT
−DYNAMIC ARC
−Q-START
*3: When "REMOTE CONTRO "= ON and a foot pedal is connected the functions are all inhibited.