ESAB TA34 AC/DC User manual

Caddy®

Instruction manual

0460 227 187 US 20131022 Valid from program version 1.20

TA34 AC/DC

TABLE OF CONTENTS

0460 227 187 © ESAB AB 2013

1 INTRODUCTION................................................................................................... 3

1.1 Useful information about the welding product .................................................3

1.2 Control panel ........................................................................................................ 3

2 TIG WELDING....................................................................................................... 5

2.1 Settings ................................................................................................................. 5

2.2 Symbol and function explanations.....................................................................6

2.3 Hidden TIG functions......................................................................................... 12

3 MMA WELDING.................................................................................................. 14

3.1 Settings ............................................................................................................... 14

3.2 Symbol and function explanations...................................................................14

3.3 Hidden MMA functions ......................................................................................15

4 WELDING DATA MEMORY ................................................................................ 17

5 FAULT CODES ................................................................................................... 18

5.1 List of fault codes .............................................................................................. 18

5.2 Fault code descriptions..................................................................................... 18

6 ORDERING SPARE PARTS ............................................................................... 21

ORDER NUMBERS ...................................................................................................22

Rights reserved to alter specifications without notice.

1 INTRODUCTION

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1 INTRODUCTION

This manual describes how to use the TA34 AC/DC control panel.

For general operating information, see the instruction manual for the power source.

When power is supplied, the unit runs a self-diagnosis of the

LEDs and display, and the program version is displayed; in this

example, the program version is 0.18.

NOTE!

There may be differences in the way the panel functions, depending on the

product in which it is installed.

Instruction manuals in other languages can be downloaded from the Internet: www.esab.com

1.1 Useful information about the welding product

The power supply is equipped with the function True AC rating (TIG).

"True AC rating" refers to the average current that can be maintained in the event of

variations in inductance and resistance in the welding circuit. This is the result of active

process control, which compensates for the inductance in the welding circuit.

The process is optimized so that the energy in the arc corresponds to the welding current

selected for AC (alternating current). Process optimization usually makes it possible to weld

at a lower set current value (than with previous power sources) thanks to reduced losses in

the welding circuit.

For the best possible oxide breakup and a long tungsten electrode life for AC TIG, we

recommend negative AC balance (-70%), which is also the default setting on delivery. It is

possible to reduce the weld pool penetration for AC TIG by lowering the AC balance to

reduce heat exchange. The minimum AC balance is -50%; see tables 1 to 3 on page 8 for

recommended current ranges. This primarily facilitates welding of weaker/thinner material

dimensions.

1.2 Control panel

1 INTRODUCTION

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1. Knob for setting data (current, voltage, percentage, seconds, and frequency)

2. Display

3. Choice of welding method TIG or MMA

4. Pushbutton for selection of TIG welding with:

• Alternating current (AC)

• Direct current (DC) -

• Direct current (DC), with pulsing

Pushbutton for selection of MMA welding with:

• Alternating current (AC)

• Direct current (DC) -

• Direct current (DC) +

5. Choice of HF start or LiftArc

™

6. Choice of 2-stroke or 4-stroke

7. Panel setting , program change with torch trigger switch

or connecting remote control unit

8. Display of VRD function (reduced open-circuit voltage) is active or inactive

NOTE!

This function works for power sources where it is implemented.

9. Indication of which parameter is shown in the display (current, voltage, percentage,

seconds, or frequency)

10. Display of measurement value for current (A) or voltage (V) during welding.

11. Indication of selected setting parameter; see section "Symbol and function

explanations."

The right button is also used for hidden functions.

12. Buttons for weld data memory settings; see section "Welding data memory."

Measured values in the display for arc voltage V and welding current A are arithmetic

average value = rectified average value.

2 TIG WELDING

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2 TIG WELDING

2.1 Settings

TIG without pulsing AC/DC and TIG with pulsing DC

Function Setting range In steps of: Default

value

HF/LiftArc

™1)

HF or LiftArc

™

LiftArc

™

2/4 stroke

2-stroke or 4-stroke - 2-stroke

Gas preflow time

0–5 s 0.1 s 0.5 s

Slope up time 0–10 s 0.1 s 0.0 s

Slope down time 0–10 s 0.1 s 1.0 s

Gas post-flow time 0–25 s 0.1 s 10.0 s

Current

4 to max

1 A 60 A

Active panel OFF or ON - ON

Changing trigger data OFF or ON - OFF

Remote control unit OFF or ON - OFF

Min. current

0–99% - 0 %

VRD - - -

These functions cannot be changed while welding is in progress.

These functions are hidden TIG functions; see description in section "Hidden TIG

functions."

The setting range depends on the power source used.

TIG with AC

Function Setting range In steps of: Default

value

Balance setting 50–98%* 1% 50%

Frequency setting 10–152 Hz 1–3 Hz 65 Hz

Electrode preheating

automatic

manual



80–120 ms



15–100 ms



Depending on frequency setting.

These functions are hidden TIG functions; see description in section "Hidden TIG

functions."

TIG with pulsing DC

Function Setting range In steps of: Default

value

Pulse current

4 to max

1 A 60 A

Pulse time

Micropulse

0.01–2.5 s

0.001–0.250 s



0.01 s

0.001 s



1.0 s

2 TIG WELDING

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Function Setting range In steps of: Default

value

Background current

4 to max

1 A 20 A

Background time

Micropulse

0.01–2.5 s

0.001–0.250 s



0.01 s

0.001 s



1.0 s

These functions are hidden TIG functions; see description in section "Hidden TIG

functions."

The setting range depends on the power source used.

2.2 Symbol and function explanations

TIG welding

TIG welding melts the metal of the work piece using an arc struck from a

tungsten electrode, which does not melt. The weld pool and electrode are

protected by shielding gas.

Alternating current (AC)

The advantage of an alternating current is good oxide break-up capacity when

welding light metals (aluminum, magnesium, and their alloys).

Direct current

A higher current produces a wider weld pool, with better penetration into the

workpiece.

Pulsed current (only DC)

Pulsing is used to achieve improved control of the weld pool and solidification

process. The pulse frequency is set slow enough so that the weld pool has time

to solidify at least partially between each pulse. In order to set pulsing, four

parameters are required: pulse current, pulse time, background current, and

background time.

Parameter settings

1. Slope up 6. Slope down

2. Welding current 7. Gas post-flow time

3. Pulse time 8. Balance

4. Background current 9. Frequency

5. Background time 10. Electrode preheating

2 TIG WELDING

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Slope up

The slope up function means that, when the TIG arc strikes, the current rises

slowly to the set value. This provides 'gentler' heating of the electrode, and gives

the welder a chance to position the electrode properly before the set welding

current is reached.

Pulse current

The higher of the two current values in the case of pulsed current.

A. Current D. Background current

B. Time E. Pulse time

C. Background time F. Pulse current

TIG welding with pulsing.

Pulse time

The time the pulse current is active during a pulse period.

Background current

The lower of the two current values in the case of pulsed current.

Background time

Time for background current, which, along with the time for pulse current, gives the pulse

period.

Slope down

TIG welding uses "slope down", where the current falls 'slowly' over a controlled

time, to avoid craters and/or cracks, when a weld is finished.

Gas post-flow

This controls the time during which shielding gas flows after the arc is

extinguished.

Balance

Setting the balance between the positive (+) electrode and negative (-) electrode

half period during alternating current welding (AC).

Lower balance values produce more heat on the electrode and better oxide

break-up on the workpiece.

Higher balance values produce more heat on the workpiece and better

penetration.

2 TIG WELDING

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Frequency

Lower frequency (alternating current) transfers more heat to the workpiece and

produces a wider weld pool.

Higher frequency produces a narrower arc with higher arc force (narrower weld

pool).

HF start

The HF start function strikes the arc, using a spark from the electrode to the

workpiece, as the electrode is brought closer to the workpiece.

Automatic preheating of electrode with AC

The preheating function is designed to provide a stable arc and safe start in a

balanced manner. The electrode preheating time preprogrammed with respect to

the set welding current. It is possible to set (fine-tune) automatic preheating

when in the outer area of the electrode's current range; see recommended

current range below.

The preheating range is 80–120 ms; 100 ms is the default value (value on

delivery).

Current ranges for electrode WP (pure tungsten)

Max A AC - 50% Balance Max A AC - 70% Balance

A. Welding current A B. Electrode diameter (mm)

Table 1 - Recommended current ranges for electrode selection WP = Green color coding

and classification names as per ISO 6848:2004

2 TIG WELDING

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Current ranges for electrode WC20 (WCe2)

Max A AC - 50% Balance Max A AC - 70% Balance

A. Welding current A B. Electrode diameter (mm)

Table 2 - Recommended current ranges for electrode selection WC20 = Grey color coding

and classification names as per ISO 6848:2004

Current ranges for electrode WLa 15/Gold Plus (70% AC Balance)

I max A AC

A. Welding current A B. Electrode diameter (mm)

Table 3 - Recommended current ranges for electrode selection WLa15 = Gold color coding

and classification names as per ISO 6848:2004



2 TIG WELDING

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Deactivating automatic electrode preheating

In hidden TIG functions, automatic preheating can be deactivated for a manual setting from

15 to 100 ms to adjust for specific conditions. When switching from an automatic to manual

setting, the previous auto-generated preheating value appears and a preferred value is

selected using the knob.

LiftArc™

The LiftArc™ function strikes the arc when the electrode is brought into contact

with the workpiece and then lifted away from it.

Striking the arc with the LiftArc™ function:

1. The electrode is touched on the workpiece.

2. The trigger switch is pressed, and a low current starts to flow.

3. The welder lifts the electrode from the workpiece: the arc strikes, and the current rises

automatically to the set value.

2 stroke

A. Gas preflow C. Slope down

B. Slope up D. Gas postflow

Functions when using 2-stroke control of the welding torch.

In 2-stroke control mode, pressing the TIG torch trigger switch (1) starts gas preflow (if used)

and strikes the arc. The current rises to the set value (as controlled by the slope-up function,

if in operation). Releasing the trigger switch (2) reduces the current (or starts slope down if in

operation) and extinguishes the arc. Gas postflow follows, if it is in operation.

2 TIG WELDING

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4 stroke

A. Gas preflow C. Slope down

B. Slope up D. Gas postflow

Functions when using 4-stroke control of the welding torch.

In 4-stroke control mode, pressing the trigger switch (1) starts gas preflow (if used). At the

end of the gas preflow period, the current rises to the pilot current (a few ampere), and the

arc is struck. Releasing the trigger switch (2) increases the current to the set value (with

slope up, if in use). When the trigger switch is pressed in (3), the current returns to the set

pilot current (with slope down if in use).

When the trigger switch is released again (4), the arc is extinguished and any gas postflow

takes place.

Active panel

Settings are made from the control panel.

Changing trigger data

This function allows changing between different welding data memories by

double-pressing the trigger of the welding gun. Only applies to TIG welding.

Remote control unit

Settings are made from the remote control unit.

The remote control unit must be connected to the remote control unit socket on

the equipment before activation. When the remote control unit is activated the

panel is inactive.

Voltage Reducing Device (VRD)

The VRD function ensures that the open-circuit voltage does not exceed 35 V

when welding is not being carried out. This is indicated by a lit VRD LED.

The VRD function is blocked when the system detects that welding has started.

If the VRD function is activated and the open-circuit voltage exceeds the 35 V

limit, this is indicated by an error message (16) appearing in the display and

welding cannot be started whilst the error message is displayed.

Contact an authorized ESAB service technician to activate this function.

2 TIG WELDING

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2.3 Hidden TIG functions

There are hidden functions in the control panel.

To access these functions, press for five seconds. The display shows a letter and

value. Select the function by pressing the right arrow. Use the knob to change the value of

the selected function.

To exit hidden functions, press for five seconds.

Function Settings

A = gas preflow 0–5 s

l = min. current 0–99%

L = automatic start pulse/electrode

preheating

0 = OFF; 1 = ON

P = start pulse default value on delivery 70 A at setting 60 A

b = micropulse (only in DC) 0 = OFF; 1 = ON

Gas pre-flow

This controls the time during which shielding gas flows before the arc is struck.

Min. current

Used to set the minimum current for the remote control.

If the max. current is 100 A and the min. current is 50 A, set the hidden function min. current

to 50%.

If the max. current is 100 A and the min. current is 90 A, set the min. current to 90%.

This function also applies when setting background current with pulsed TIG.

Electrode preheating

In the automatic start pulse/electrode preheating (L) function, electrode preheating is only

activated in AC. This function is used to achieve a stable arc rapidly, and preheating extends

the service life of the electrode.

Start pulse

NOTE!

To activate manual start pulse (P), the function (L) must first be deactivated in the

hidden function; select (0 = OFF).

Start pulse produces a safe, controlled start and is balanced and adapted to the electrode

diameter and set welding current.

2 TIG WELDING

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Micropulse

To select micropulse, the machine must be in the pulsed current function . The value

for pulse time and background current is normally 0.01–2.50 seconds. By using the

micropulse, the time can decrease to 0.001 seconds. When the micropulse function is

active, times that are shorter than 0.25 seconds are shown in the display without decimal

points.

3 MMA WELDING

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3 MMA WELDING

3.1 Settings

Function Setting range In steps of: Default

value

Current

16 to max. A

1 A 100 A

Hot start

0–99 1 0

Arc force

0–99 1 5

Drop welding

0=OFF or 1=ON - OFF

Welding regulator 1=OFF or 0=ON - ON

Active panel OFF or ON - ON

Remote control unit OFF or ON - OFF

Min. current

0–99% - 0 %

VRD - - -

These functions are hidden; see description in the "Hidden MMA functions" section.

The setting range depends on the power source used.

3.2 Symbol and function explanations

MMA welding

MMA welding may also be referred to as welding with coated electrodes. Striking

the arc melts the electrode, and its coating forms protective slag.

During MMA welding, it is possible to weld with reversed polarity without reconnection of

welding cables to the power source.

Select MMA welding , then press .

• AC refers to alternating current.

• DC (-) refers to direct current with negative polarity on the electrode.

• No LED is illuminated for direct current with positive polarity on the electrode.

Active panel

Settings are made from the control panel.

Remote control unit

Settings are made from the remote control unit.

The remote control unit must be connected to the remote control unit socket on

the equipment before activation. When the remote control unit is activated the

panel is inactive.

3 MMA WELDING

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Voltage Reducing Device (VRD)

The VRD function ensures that the open-circuit voltage does not exceed 35 V

when welding is not being carried out. This is indicated by a lit VRD LED.

The VRD function is blocked when the system detects that welding has started.

If the VRD function is activated and the open-circuit voltage exceeds the 35 V

limit, this is indicated by an error message (16) appearing in the display and

welding cannot be started whilst the error message is displayed.

Contact an authorized ESAB service technician to activate this function.

3.3 Hidden MMA functions

There are hidden functions in the control panel.

To access these functions, press for five seconds. The display shows a letter and

value. Select the function by pressing the right arrow. Use the knob to change the value of

the selected function.

To exit hidden functions, press for five seconds.

Function Settings

C = Arc force 0–99%

d = drop welding 0 = OFF; 1 = ON

F = ArcPlus™ welding regulator 0 = OFF; 1 = ON

H = Hot start 0–99%

I = min. current 0–99%

Arc force

The arc force is important in determining how the current changes in response to

a change in the arc length. A lower value gives a calmer arc with less spatter.

Drop welding

Drop welding can be used when welding with stainless electrodes. The function involves

alternately striking and extinguishing the arc in order to achieve better control of the heat

supply. The electrode needs only to be raised slightly to extinguish the arc.

ArcPlus™ welding regulator

The ArcPlus™ welding regulator is a new type of control that produces a more intense,

concentrated, and calmer arc. It recovers more quickly after spot short circuits, which

reduces the risk of the electrode sticking.

• ArcPlus™ (0) is recommended for basic electrodes.

• ArcPlus™ (1) is recommended for rutile electrodes.

Hot start

Hot start increases the weld current for an adjustable time at the start of welding,

thus reducing the risk of poor fusion at the beginning of the joint.

3 MMA WELDING

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Min. current

Used to set the minimum current for the remote control unit.

If the max. current is 100 A and the min. current is 50 A, set the min. current of the hidden

function to 50%.

If the max. current is 100 A and the min. current is 90 A, set the min. current to 90%.

4 WELDING DATA MEMORY

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4 WELDING DATA MEMORY

Two different welding data programs can be stored in the control panel memory.

Press button or for five seconds to save the welding data to memory. The

welding data is saved when the green indicator lamp flashes.

To switch between the different welding data memories, press button or .

The welding data memory has a backup battery so that the settings remain even if the

machine has been switched off.

5 FAULT CODES

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5 FAULT CODES

A fault code is used to indicate that a fault has occurred in the equipment. It is indicated in

the display by an E followed by a fault code number.

A unit number is displayed to indicate which unit generated the fault.

Fault code numbers and unit numbers are shown alternately.

If several faults have been detected, only the code for the last fault is displayed. Press any

function button or turn the knob to remove the fault from the display.

NOTE!

If the remote control is activated, deactivate it by pressing to remove the

fault.

5.1 List of fault codes

U 0 = welding data unit U 2 = power source U 5 = AC unit

U 1 = cooling unit U 4 = remote control unit

5.2 Fault code descriptions

Code Description

E 4

U 0

U 5

5 V power supply low

The power supply voltage is too low.

The current welding process is stopped, and start is prevented.

Action: Turn off the power supply to reset the unit. Contact a service technician if the

fault persists.

E 6

U 1

U 2

U 5

High temperature

The thermal overload cutout has tripped.

The current welding process is stopped and cannot be restarted until the temperature

has decreased.

Action: Check that the cooling air inlets or outlets are not blocked or clogged with

dirt. Check the duty cycle being used to make sure that the equipment is not

overloaded.

E 7

U 5

High temperature

The thermal overload cutout has tripped.

The current welding process is stopped and cannot be restarted until the temperature

has decreased.

Action: Check that the cooling air inlets or outlets are not blocked or clogged with

dirt. Check the duty cycle being used to make sure that the equipment is not

overloaded.

E 8

U 1

U 5

Faulty 24 V/15 V supply voltage

The supply voltage is too high or too low.

The current welding process is stopped, and start is prevented.

Action: Turn off the power supply to reset the unit. Contact a service technician if the

fault persists.

5 FAULT CODES

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Code Description

E 9

U 1

U 5

Faulty 24 V/15 V supply voltage

The supply voltage is too high or too low.

The current welding process is stopped, and start is prevented.

Action: Turn off the power supply to reset the unit. Contact a service technician if the

fault persists.

E 12

U 0

U 1

U 4

U 5

Communication error (warning)

Less serious interference on the CAN bus.

Action: Check that there are no faulty units connected on the CAN bus. Check the

cables. Contact a service technician if the fault persists.

E 14

U 0

Communication error (bus off)

Serious interference on the CAN bus.

Action: Check that there are no faulty units connected on the CAN bus. Check the

cables. Contact a service technician if the fault persists.

E 15

U 0

Communication problems (lost message)

The system's CAN bus has been overloaded.

Action: Contact a service technician if the fault persists.

E 16

U 2

High open-circuit voltage VRD

Open circuit voltage was too high.

Action: Turn off the power supply to reset the unit. Contact a service technician if the

fault persists.

E 19

U 0

Memory error

Content of existing memory is incorrect. Default data will be used.

Action: Turn off the power supply to reset the unit. Contact a service technician if the

fault persists.

E 20

U 2

High inductance in the welding circuit

The power source cannot produce the desired current because the measured

inductance in the welding circuit is too high. The fault indication is reset if the

inductance reading receives a sufficiently low value at weld start. Reset can also be

achieved by turning off the power.

Action: Use shorter welding cables, and make sure that the cables are not coiled.

Place the welding cable and connector cable next to each other. If possible, the

inductance can be reduced by welding with a shorter arc.

Contact a service technician if the fault persists.

E 25

U 0

Lost contact with AC unit

The control panel has lost contact with the AC unit.

The current welding process stops.

Action: Contact a service technician if the fault persists.

5 FAULT CODES

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Code Description

E 26

U 0

Program operating fault

Something prevented the processor from performing its normal tasks in the program.

The program restarts automatically. The current welding process is stopped. This

fault does not disable any functions.

Action: Contact a service technician if the fault persists.

E 29

U 0

U 1

No cooling water flow

The flow monitor switch has tripped.

The current welding process is stopped, and start is prevented.

Action: Check the cooling water circuit and the pump.

E 41

U 0

Lost contact with the cooling unit

The welding data unit has lost contact with the cooling unit. The welding process

stops.

Action: Check the wiring. If the fault persists, contact a service technician.

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ESAB TA34 AC/DC User manual

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