ESAB U6 Aristo is a versatile and advanced welding control panel designed to provide precise and efficient welding operations for a wide range of applications. With its intuitive interface, user-friendly features, and comprehensive welding functions, the U6 Aristo empowers welders to achieve superior results and enhance their productivity. From basic welding tasks to complex fabrication projects, this control panel offers a seamless and reliable welding experience.
ESAB U6 Aristo is a versatile and advanced welding control panel designed to provide precise and efficient welding operations for a wide range of applications. With its intuitive interface, user-friendly features, and comprehensive welding functions, the U6 Aristo empowers welders to achieve superior results and enhance their productivity. From basic welding tasks to complex fabrication projects, this control panel offers a seamless and reliable welding experience.
0740 800 194 090707
Aristot
U6
Service manual
S0740 800 194/E090707/P28
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Rights reserved to alter specifications without notice.
READ THIS FIRST 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WIRING DIAGRAM 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DESCRIPTION OF OPERATION 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1AP1 Welding data board 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1AP1:1 Power supply 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1AP1:2 Communication 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1AP1:5 Display panel U6 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1AP1:6 Settings 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1AP1 Component positions 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FAULT CODES 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fault log 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fault codes 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Summary of fault codes 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fault code description 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SERVICE INSTRUCTIONS 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What is ESD? 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service aid 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTRUCTIONS 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control panel's working method 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control panel 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Symbols in the display 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MENUS 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The main menu and the measurements menu 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The selection menu 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Menu structure 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MIG/MAG FUNCTIONS 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TIG FUNCTIONS 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MMA FUNCTIONS 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL FUNCTIONS 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote control unit 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Settings 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VRD (Voltage Reducing Device) 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPARE PARTS 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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READ THIS FIRST
Maintenance and repair work should be performed by an experienced person, and
electrical work only by a trained electrician. Use only recommended replacement parts.
This service manual is intended for use by technicians with electrical/electronic training for
help in connection with fault-tracing and repair.
Use the wiring diagram as a form of index for the description of operation. The circuit
board is divided into numbered blocks, which are described individually in more detail in
the description of operation.
The spare parts list is published as a separate document, see page 27.
This manual contains details of design changes that have been made up to and including
June 2009.
The manual is valid for: Control panel U6
CAUTION !
STATIC ELECTRICITY can damage circuit
boards and electronic components.
S Observe precautions for handling electrostatic-
sensitive devices.
S Use proper static-proof bags and boxes.
ESD
INTRODUCTION
Control panel U6 is intended for MMA-welding, TIG-welding, pulsed TIG-welding,
MIG/MAG-welding and pulsed MIG/MAG-welding. U6 can also be used for arc-air gouging.
The control panel consists of an operator's control panel, a display board and a welding
data board.
The power source, the wire feed unit and control panel, each have their own
microprocessor for control. The control panel is the central unit in the system: in addition to
setting and controlling welding data, it also has overall control of the entire system.
The U6 panel has knobs for setting welding voltage and wire feed speed / current. Other
settings are made by pushbuttons together with text in the display.
More control panel information is found in chapter Instructions, see page 13.
Control panel A24
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WIRING DIAGRAM
The MMC module consists of three main units:
1AP1 Welding data board - Processor and CAN communication board
1AP2 Display board
1AP3 Operators control panel - Key pad with pushbuttons
Wiring diagram for the U6 panel.
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DESCRIPTION OF OPERATION
1AP1 Welding data board
Circuit board identity
The welding data board has a machine ID, a hardware ID, a unit type and a unit number. To
read this you need the ESAT service kit, see page 12.
The machine ID determines which type of control panel the board is intended for.
The hardware ID shows the design and type of circuit board.
The unit type and unit number are used for identification on the CAN bus.
The identification numbers of this board are:
Machine ID = 36
Hardware ID = 1
Unit type = 0
Unit number = 0
Note!
If more than one welding data unit is connected to the CAN bus, the welding data unit with
the lowest
unit number is then in command of the system. The other unit is inactive.
Example:
A power source with control panel A24 (unit number = 1) is connected to a wire feeder with
control panel U6 (unit number = 0). The U6 welding data board will then control the system.
1AP1:1 Power supply
Circuit board 1AP1 receives a 12 V power supply from the control board in the
power source. This is regulated to 5 V, which supplies all the circuits in the
control panel. The 12 V and 5 V supplies are monitored by a reset circuit:
tolerance values are 12 V +2/-3 V and 5 V $0.25 V. Monitoring the voltages
makes sure that, in the event of loss of power, the processor has time to save
the current data to RAM and to shut down the current processes in a controlled
manner.
Loss of power supply does not generate a fault code. If the 12 V supply drops
below 9 V, either momentarily or indefinitely, but does not fail entirely, the
background lighting to the display will be dark, followed by display of fault code
4. The power source must be turned off, and then on again, to reset the
system.
The RAM memory requires a power supply even when the power source is
turned off. This is provided by battery BA1, see the component positions on
page 6. The battery is connected by the reset circuit when the mains power
supply is turned off or lost. The battery voltage is monitored by the processor:
fault code 8 is displayed if it drops below 2.4 V.
Replacing the battery
The battery is soldered to the circuit board. Removing it causes the RAM
memory to lose all stored data, e.g. the fault log. When the new battery has
been fitted, and the power source is restarted, the panel will be in its default
state, i.e. as it originally left the factory.
It is possible to prevent data from being lost if a 12 V supply is maintained to
the board while the battery is being changed.
CAUTION!
The circuit board is sensitive to ESD.
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1AP1:2 Communication
Communication between the MMC unit and other units is via the system's
CAN bus.
Resistor R3 is the terminating resistor (120 Ω) for the bus. Read more about
the CAN bus in the service manual for the power source.
1AP1:5 Display panel U6
The U6 display panel is backlit by parallel-connected LEDs, controlled by
transistor Q1. Display contrast can be adjusted by potentiometer R52: see the
component positions diagram on page 6.
1AP1:6 Settings
The U6 panel has pulse generators (encoders) for setting the welding voltage
and wire feed speed.Other functions are set by pushbuttons. Turning the
voltage adjustment pulse generator briefly connects contact A3 (0 V) to
contacts A1 and A2, but with a slight time difference between them. This
generates pulses that are displaced by about 90° relative to each other. One
square wave pulse is used as clock frequency and the other square wave
pulse defines the knob-turning direction by comparing the phase position
(positive or negative) compared to the clock frequency.
The wire feed speed pulse generator operates in a similar manner.
1AP1 Component positions
Socket C - sleeve positions: 5 4 3 2 1 (Top row)
9 8 7 6 (Bottom row)
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FAULT CODES
Fault log
All faults that occur when using the welding equipment are documented as error messages
in the fault log. When the fault log is full, the oldest message will automatically be erased
when the next fault occurs.
Only the most recent fault message is displayed on the control panel. To read the entire
fault log, the equipment must be connected to the ESAT: see service tools on page 12.
Faults are monitored/detected in two ways: by test routines that are run on initiation and by
functions that can detect a fault when it occurs.
Fault codes
Fault codes are updated every three seconds. They are shown on the display in the form of
a symbol, as follows:
The upper figure in the symbol is the number of the particular fault code. The
lower figure indicates which unit type has generated the fault The following
unit types are used:
0 = welding data unit 1 = cooling unit 2 = power source
3 = wire feed unit 4 = remote control unit
The above symbol shows that the welding data unit (0) has lost contact with the power
source.
Symbols may be steady or flashing, depending on the type of fault. Flashing symbols are
indicaded with “o” in the table below.
Press any of the function keys in order to clear the symbol from the display.
Summary of fault codes
Fault
code
Description Welding
data
unit
Cooling
unit
Power
source
Wire
feed
unit
Remote
control
unit
1 Memory error, EPROM x x x x x
2 Memory error, RAM x x x x
3 Memory error, external RAM x x x
4 +5 V power supply x x
5 Intermediate DC voltage outside limits x
6 High temperature x
8 Power supply 1 x x x x x
9 Power supply 2 x x x
10 Power supply 3 x
11 Wire feed speed x
12 Communication error (warning) x x x x x
14 Communication error (bus off) x
15 Lost messages x x x x
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Fault
code
Remote
control
unit
Wire
feed
unit
Power
source
Cooling
unit
Welding
data
unit
Description
16 High open-circuit voltage x
17 Lost contact with the wire feed unit o
18 Lost contact with the power source o
19 Incorrect setting values in external RAM x
20 High inductance in the welding circuit x
22 Transmitter buffer overflow x x x x
23 Receiver buffer overflow x x x x
26 Program operating fault x x x
27 Out of wire o
28 Stack overflow x x x x
29 No cooling water flow o
31 No reply from the display unit x
32 No gas flow x
40 Incompatible units x
41 Lost contact with the cooling unit x
Fault code description
This manual describes the fault codes for the welding data unit of control panel U6.
The fault codes for other units are described in the manuals for these units.
Code Description
1 EPROM check sum error - program memory error
This indicates a fault in the check sum test of the program memory, which is run only when
initiating the unit after power-up. This fault does not disable any functions.
The program memory is damaged. This is a serious fault, that can have unforeseen effects.
Action: Restart the equipment. If the fault persists, load new software via ESAT. If the fault
still persists, replace the welding data board 1AP1.
2 Microprocessor RAM error
The microprocessor is unable to read/write from/to a particular memory address in its
internal memory. This test is preformed only as part of initiation at power on. This fault does
not disable any functions.
Action: Restart the equipment. If the fault persists, replace the welding data board 1AP1.
3 Error in external RAM
Read/write test of the processor's external RAM. This test is preformed only as part of
initiation at power on.
The microprocessor is unable to read/write from/to a particular memory address in its
external memory. This fault does not disable any functions.
Action: Restart the equipment. If the fault persists, replace the welding data board 1AP1.
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Code Description
4 5 V power supply too low
The unregulated power supply voltage for the processor is too low: the smoothing
capacitors cannot keep the voltage up enough for the processor to continue to operate. The
processor stops all normal activities, expecting to be shut down.
Action: Turn off the mains power supply to reset the unit. If the fault persists, check the
power supply to circuit board 1AP1.
8 Low battery voltage +3 V
This test is preformed only as part of initiation after power-up. This fault does not disable any
functions.
Action: Replace the battery on circuit board 1AP1. If it is not replaced, the entire contents
of the battery backed-up memory will be lost.
12 Communication error (warning)
The load on the system CAN bus is temporarily too high.
Action: Check the equipment to ensure that only one wire feed unit and/or remote control
unit is connected.
14 Communication error (bus off)
Major interference on the system's CAN bus. The communication has temporarily ceased,
due to excessive load on the bus. The current welding process is stopped.
Action: Check that there are no faulty units connected to the CAN bus. Check the cables.
Turn off the mains power supply to reset the unit.
15 Lost messages
The bus CAN controller indicates that a message has been lost. No functions are disabled
by this fault.
Action: Check that all units are correct connected to the CAN bus.
17 Lost contact with the wire feed unit
Current activities will be stopped and welding start is prevented.
This fault can be caused by a break in the connection (i.e. the CAN cable) between the wire
feed unit and the control panel.
Action: Check the CAN cabling.
18 Lost contact with the power source
Current activities will be stopped and welding start is prevented.
This fault can be caused by a break in the connection between the welding data board in the
MMC unit and the control board in the power source.
Action: Check the CAN cabling.
19 Memory error in data memory
This fault will be detected if the information in the battery-backed-up memory has become
corrupted.
Action: This fault corrects itself, Turn off the mains power supply to reset the unit. Stored
data in the current memory section will be lost. If the battery voltage is correct, and if the
fault recurs each time the unit is started, there is a fault in the persistent memory. Replace
the welding data board, 1AP1, in the MMC unit.
22 Transmitter buffer overflow
The welding data unit is unable to transmit information to the other units at a sufficiently high
speed.
Action: A break in the bus line can cause this fault. Check the CAN cabling. Turn off the
mains power supply to reset the unit.
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Code Description
23 Receiver buffer overflow
The welding data unit is unable to process information from the other units at a sufficiently
high speed. This fault is caused by abnormal loading of the microprocessor in the welding
data unit.
Action: Turn off the mains power supply to reset the unit.
26 Program operatiing fault
Something has prevented the processor from performing its normal tasks in the program.
The program restarts automatically. The current welding process will be stopped. This fault
does not disable any functions.
This fault should not happen. Contact ESAB if the fault yet occurs.
28 Stack overflow
The program execution does not work.
This fault should not happen. The fault code is intended as an aid during development work.
Contact ESAB if the fault yet occurs.
29 No cooling water flow
The flow monitor switch has tripped.
The current welding process is stopped and starting is prevented.
Action: Check the cooling water circuit and the pump.
31 No reply from the display unit
The microprocessor has no contact with the display board.
Action: Check the ribbon cable and connectors between the welding data board (1AP1)
and the display board (1AP2).
40 Incompatible units
Incorrect wire feed unit is connected. Welding start is prevented.
Action: Connect the correct wire feed unit.
41 Lost contact with the cooling unit
The welding data board has lost contact with the cooling unit. The welding process is
stopped and starting is prevented.
Action: Check the wiring. Turn off the mains power supply to reset the unit.
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SERVICE INSTRUCTIONS
What is ESD?
A sudden transfer or discharge of static electricity from one object to another. ESD stands for
Electrostatic Discharge.
How does ESD damage occur?
ESD can cause damage to sensitive electrical components, but is not dangerous to people.
ESD damage occurs when an ungrounded person or object with a static charge comes into
contact with a component or assembly that is grounded. A rapid discharge can occur,
causing damage. This damage can take the form of immediate failure, but it is more likely
that system performance will be affected and the component will fail prematurely.
How do we prevent ESD damage?
ESD damage can be prevented by awareness. If static electricity is prevented from building
up on you or on anything at your work station, then there cannot be any static discharges.
Nonconductive materials (e.g. fabrics), or insulators (e.g. plastics) generate and hold static
charge, so you should not bring unnecessary nonconductive items into the work area.
It is obviously difficult to avoid all such items, so various means are used to drain off any
static discharge from persons to prevent the risk of ESD damage. This is done by simple
devices: wrist straps, connected to ground, and conductive shoes.
Work surfaces, carts and containers must be conductive and grounded. Use only antistatic
packaging materials. Overall, handling of ESD-sensitive devices should be minimized to
prevent damage.
CAUTION !
STATIC ELECTRICITY can damage circuit
boards and electronic components.
S Observe precautions for handling electrostatic-
sensitive devices.
S Use proper static-proof bags and boxes.
ESD
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Service aid
We can offer a number of service tools that will simplify the service.
Antistatic service kit
Ordering no. 0740 511 001
The kit makes it easier to protect sensitve
components from electrostatic discharge.
Contents:
A conductive mat (size 610 x 610 mm)
A 1.5 metre long ground cable with a
crocodile clip
An adjustable wrist strap and cable with
an inbuilt protective resistor
Antistatic service kit
ESAT service kit
The software update is made from a PC, it has to be managed by a trained serviceman. For
this a PC program called ESAT, ESAB Software Administration Tool, is needed. The PC is
connected to the welding equipment by a cable connector and a CAN reader. From the
ESAT it is possible to update the software. ESAT also contains service functions by which it
is possible to control, change or read the different functions of the equipment.
For the installation and use of the ESAT you need a PC with operating system Windows.
The ESAT service kit contents:
CAN adapter with connection cables
CD with software
Instruction manual for ESAT
Ordering no:
0458 847 880 PPCAN for connection to the print port of the PC
0458 847 881 USB2CAN for connection to the USB port of the PC
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INSTRUCTIONS
This chapter is an extract from the instruction manual for the U6 control panel. For detailed
instructions, please see the instruction manual.
SAFETY
CAUTION!
Read and understand the instruction manual before
installing or operating.
INTRODUCTION
Control panel's working method
The control panel can be said to comprise two units: the primary memory and the welding
data memory.
Store
Primary memory Welding data memory
Recall
In the primary memory, a complete set of welding data settings are created which can be
stored in the welding data memory.
When welding, it is always the content of the primary memory which controls the process. It
is therefore also possible to recall welding data settings from the welding data memory to
the primary memory.
Note that the primary memory always contains the most recently set welding data settings.
These can be recalled from the welding data memory or individually altered settings. In
other words, the primary memory is never empty or “resetted”
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Control panel
1 Display
2 Knob for setting the voltage
3 Knob for setting the wire feed speed or
current
4 Soft pushbuttons (function keys)
5 MENU button
Soft pushbuttons
The functions of these buttons (i.e. what each one does) change, depending on the
sub-menu shown on the display. The particular function for each button is shown by the
text in the bottom line of the display, corresponding to the buttons. (A white dot beside the
text indicates that the button is active.)
MENU pushbutton
This pushbutton brings you to the selection menu (see item <>) if you are in the main menu.
If you are in some other menu, it moves you back up one menu.
Symbols in the display
Back to the main menu.
Move the cursor down to a new setting parameter.
Change the function in the selected line.
Increase the value. Decrease the value.
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MENUS
The control panel uses several different menus: the main menu, the measurements menu,
the selection menu, the process menu, the settings menu, the configuration menu and the
memory menu. A startup display is also shown when starting, with information on the type
of panel and the software version in use.
The main menu and the measurements menu
The main menu always appears immediately after starting,
showing the values that are set. If you are in the main menu
when you start to weld, the menu changes automatically to show
the measured values (the measurements menu). The measured
values remain on the display even after welding stops.
Other menus can be accessed without losing the measured values.
It is only when a knob is turned or the welding method changed that the setting values are
displayed instead of the measured values.
The selection menu
Use the selection menu to select the next level of menu to which
you want to go: process, settings, configuration or memory.
The process menu
Use this menu to
change the welding
process, material type
etc.
The settings menu
Use this menu to set
welding parameters,
such as gas pre-flow,
hot start time, crater fill
time etc.
The configuration
menu
Use this menu to
change the language,
measurement units etc.
The memory menu
Use this menu to store,
recall and/or erase
various stored welding
data settings. There
are ten storage
positions for welding
data.
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Menu structure
MIG/MAG
2/4 stroke
MIG/MAG Puls
2/4 stroke
TIG TIG Pulsed MMA Air gouging
Craterfill Craterfill 2/4stroke 2/4 stroke
Hot start Hot start Gas purg Gas purg Hot start
Creep start Creep start
Gas purge Gas purge
Wire inch Wire inch
Process menu Setting menu Configuration menu
Memory menu
MIG/MAG
MIG/
MAG
Puls
TIG
TIG Puls
MMA Air goug MIG/MAG MIG/MAG
Puls
TIG TIG Puls MMA MIG/MAG
MIG/MAG
Puls
TIG
TIG Puls
MMA Air goug MIG/MAG
TIG
MMA
Air goug
QS/
Synergic
Wire type
Gas
Wire diam
Wire ty
Gas
Wire dia
HF
Liftarc
E-type
E-diam
E-diam Induktanc
Gaspreflo
Hot start
Craterfill
Burnback
Gaspostfl
Spot weld
Gasprefl
Hot start
Craterfill
Burnback
Gaspostfl
Spot weld
Gasprefl.
Slope up
Slope
down
Gaspostfl
Puls curr.
Puls time
Backgr. c.
Backgr. t.
Gasprefl.
Slope up
Slope
down
Gaspostfl.
Arc force
Hot start
Lang.
Dimension
Panel ena
Trigger
data
Lang.
Dimensio
Panalena
Triggerd.
Min cur
rent
Lang
Dimension
Panel
enable
Lang
Dimension
Panel
enable
Store
Recall
Delete
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MIG/MAG FUNCTIONS
2-stroke
Gas pre-flow Hot
start
Welding Crater
fill
Gas post-flow
Functions when using 2-stroke control of the welding gun.
In the 2-stroke control mode, pressing the welding gun trigger switch starts gas pre-flow (if
used) (1) and strikes the arc. Releasing the trigger switch (2) starts crater filling (if in
operation), extinguishes the arc and starts gas post-flow (if in operation).
TIP: If the welding gun trigger switch is pressed again during the crater fill time, welding
can be continued for as long as required (shown by the dotted line), using the crater fill
data. Crater filling can also be interrupted by quickly pressing and releasing the trigger
switch while crater filling is in progress.
- Activation of 2-stroke performed in the main menu.
4-stroke
Gas pre-flow Hot
start
Welding Crater fill Gas post-flow
Function when using 4-stroke control of the welding gun.
In the 4-stroke control mode, pressing the welding gun trigger switch starts gas pre-flow (1).
Releasing the trigger switch (2) starts the welding process. At the end of welding, the welder
presses the trigger switch again (3), which starts crater filling (if in operation) and reduces
the welding data to a lower value. Releasing the trigger switch again (4) extinguishes the
arc and starts gas post-flow (if used).
TIP: Crater filling stops when the trigger switch is released. Keeping the button pressed
continues welding at the lower data of the crater filling function (dotted line).
- Activation of 4-stroke performed in the main menu.
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Crater filling
Crater filling helps to avoid pores, thermal cracking and crater formation in the workpiece at
the end of the weld.
- Setting of crater filling time performed in the settings menu.
Hot start
The hot start function increases the welding current for an adjustable time at the start of
welding, which reduces the risk of poor fusion at the start of the weld.
- Setting of hot start time performed in the settings menu.
Creep start
The creep start function reduces the initial feed speed of the wire to 50 % of the set speed
until the wire contacts the workpiece.
- Activation of creep start performed in the main menu.
Gas purging
The gas purging function is used when measuring the gas flow rate, or to purge the gas
hoses of any air or moisture before starting to weld. It continues as long as the button is
held pressed, and prevents voltage from being applied and wire feed from starting.
- Activation of gas purging performed in the main menu.
Cold wire feed
Cold wire feed is used in order to feed out wire without energising the arc. The wire is fed
out for as long as the button is held pressed.
- Activation of cold wire feed performed in the main menu.
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QSett
QSet , is used to facilitate setting welding parameters.
Turning the knob clockwise increases (+) the arc length.
Turning the knob anti-clockwise reduces (-) the arc length.
SHORT ARC
When first starting welding with a wire type / gas type QSetautomatically sets all the
necessary welding parameters. After that QSetstores all the data to produce a good
weld. The voltage then automatically conforms to changes in the wire feed speed.
The first weld must last for at least 6 seconds for the parameters to be correct.
SPRAY ARC
When approaching the spray arc area the value for QSet must be increased.
Disengage the QSet function when welding with pure spray arc, All settings are
inherited from QSet, with the exception of the voltage which must be set.
Recommendation: Make the first weld (6 seconds) with QSet on a test piece to obtain
all the correct data.
The QSet function and the synergy function cannot be
activated at the same time.
- Activation of QSet performed in the process menu.
Synergy
Every combination of wire type, wire diameter and gas mixture requires a unique
relationship between wire feed speed and voltage (arc length) in order to ensure a stable
arc. The arc voltage (arc length) is automatically controlled in accordance with the
preprogrammed synergy line that has been selected by the welder, which makes it much
easier quickly to find the optimum welding parameters. The relationship between the wire
feed speed and the other parameters is referred to as the synergy characteristic or synergy
line.
Synergy ON: the main menu shows the set wire feed
speed, as well as positive and negative deviation from
the synergy line's voltage.
Positive deviation is displayed with a bar above SYN,
negative is displayed below.
Synergy OFF: the main menu shows the set value for voltage and wire feed speed.
- Activation of synergy performed in the process menu.
Synergy line package
The synergy line package supplied with the machine is called “Standard synergic lines” and
contains the 33 most frequently used synergy lines.
It is also possible to order other packages of synergy lines, but these must be installed by
an authorised ESAB service engineer.
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Inductance
Higher inductance produces a more flowing weld and less spatter. Lower inductance
produces a harsher sound and a stable, concentrated arc.
- Setting of inductance performed in the settings menu.
Gas pre-flow
The gas pre-flow time is the time during which the shielding gas flows before the arc is
struck.
- Setting of gas pre-flow time performed in the settings menu.
Burnback time
The burnback time is a delay between when the wire feed unit starts to brake the wire until
the power unit shuts off the welding current. Too short a burnback time leaves a long piece
of filler wire projecting after welding has stopped, with resulting risk of the wire freezing into
the solidifying weld pool. On the other hand, too long a burnback time reduces the stickout
to such an extent that there is a risk of the arc striking from the welding gun contact tip
when welding is next started.
- Setting of burnback time performed in the settings menu.
Gas post-flow
The gas post-flow function controls the time during which shielding gas continues to flow
after the arc has been extinguished.
- Setting of gas post-flow time performed in the settings menu.
Change of trigger data
Using this function, it is possible to switch to various pre-set welding data alternatives by
double-clicking on the welding gun's trigger.
Switching takes place between the memory positions 1, 2 and 3. If there is no data in
memory position 2, switching takes place instead between positions 1 and 3.
ON - Switching between memory positions can take place before, after or during welding.
ARC OFF - Switching between memory positions can only take place before or after
welding.
- Activation of trigger data switching performed in the configuration menu.
AVC feeder
When this function is activated it is possible to use an Arc Voltage Controlled (so-called “Off
The Arc”) feeder, where the arc voltage from the power source is used to power the wire
feed unit.
- Activation of AVC feeder is performed in the configuration menu.
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ESAB U6 Aristo is a versatile and advanced welding control panel designed to provide precise and efficient welding operations for a wide range of applications. With its intuitive interface, user-friendly features, and comprehensive welding functions, the U6 Aristo empowers welders to achieve superior results and enhance their productivity. From basic welding tasks to complex fabrication projects, this control panel offers a seamless and reliable welding experience.
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