US
Caddy
TA34 AC/DC
Instruction manual
Valid from program version 1.200460 227 187 US 110503
1 INTRODUCTION 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Useful information about the welding equipment
The power source is equipped with the function True AC rating (GTAW). 3. . . . . . . . . .
1.2 Control panel 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 GTAW WELDING 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Settings 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Symbol and Function explanations 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Hidden GTAW functions 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 SMAW WELDING 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Settings 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Symbol and Function explanations 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Hidden SMAW functions 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 WELDING DATA MEMORY 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 FAULT CODES 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 List of fault codes 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 Fault code descriptions 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 ORDERING SPARE PARTS 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ORDERING NUMBER 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rights reserved to alter specifications without notice.
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1 INTRODUCTION
The manual describes the use of TA34 AC/DC control panel.
For general information about operation see instruction manual for the power source.
When mains power is supplied the unit runs a self diagnosis of the
LEDs and the display, the program version is displayed and in this
example the program version is 0.18.
NOTE! Differences in the panel function may occur, depending on which product is
installed.
Instruction manuals in other languages can be downloaded from the website,
www.esab.com.
1.1 Useful information about the welding equipment
The power source is equipped with the function True AC rating (GTAW).
“True AC rating” means the average current 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 present in the
welding circuit.
The process is optimised so that the energy in the arc will correspond to the set
welding current selected for AC (alternating current). Process optimisation normally
leads to welding being possible at a lower set current value (than with previous
power sources) thanks to reduced losses in the welding circuit.
For the best possible oxide break-up and a long tungsten electrode life for AC TIG,
we recommend a negative AC balance (-70%), which is also the basic setting on
delivery. It is possible to reduce the weld pool penetration for AC GTAW by
reducing the heat exchange by lowering the AC balance. The minimum AC balance
value is -50%, see tables 1-3 on page 9 for recommended current ranges. This
primarily facilitates welding of weaker/thinner material dimensions.
Measured value in the display for arc voltage V, and welding current A, is arithmetic
average value = rectified average value.
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1.2 Control panel
Knob for setting data (current, voltage, percentage, seconds, or frequency)
Display
Choice of welding method GTAW or SMAW
Pushbutton for selection of GTAW-welding with:
S Alternating current AC
S Direct current DC -
S Direct current DC - with pulsing
Pushbutton for selection of SMAW-welding with:
S Alternating current AC
S Direct current DC -
S Direct current DC +
Choice of HF start or LiftArct
Choice of 2-stroke or 4-stroke
Setting from panel , program change with torch trigger switch or
connecting remote control unit
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Display of VRD function (reduced open-circuit voltage) is active or inactive.
(NOTE! This function works for power sources where it is implemented.)
Indication of which parameter is shown in the display (current, voltage,
percentage, seconds or frequency)
Choice of current indication (A) or voltage indication (V) during welding, in the
display
Indication of selected setting parameter, see page 7. The right-hand button is
also used for hidden functions
Buttons for weld data memory settings. See page 16.
2 GTAW WELDING
2.1 Settings
GTAW without pulsing AC/DC and GTAW with pulsing DC
Function Setting range In steps of: Default value
HF / LiftArc t
2/4-stroke
Gas pre flow time
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 A - max
Active panel OFF or ON - ON
Changing trigger data OFF or ON - OFF
Remote control unit OFF or ON - OFF
Min current
VRD - - -
1)
These functions cannot be changed while welding is in progress.
2)
These functions are hidden TIG functions, see description in point 2.3.
3)
The setting range is dependent on the power source used.
1)
1)
2)
2)
HF or LiftArct - LiftArct
2 stroke or 4 stroke - 2 stroke
0 - 5 s 0.1 s 0.5 s
3)
0-99% - 30%
1 A 60 A
GTAW 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
*) Depending on frequency setting.
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80 - 120 ms
15 - 100 ms
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GTAW with pulsing DC
Function Setting range In steps of: Default value
Pulse current 4 A - max
Pulse time
Micro pulse
Background current 4 A - max
Background time
Micro pulse
2)
These functions are hidden TIG functions, see description in point 2.3.
3)
The setting range is dependent on the power source used.
2)
2)
0.01 - 2.5 s
0.001 - 0.250 s
0.01 - 2.5 s
0.001 - 0.250 s
2.2 Symbol and Function explanations
GTAW welding
3)
3)
1 A 60 A
0.01 s
0.001 s
1 A 20 A
0.01 s
0,001 s
1.0 s
1.0 s
GTAW welding melts the metal of the workpiece, using an arc struck from a tungsten
electrode, which does not melt itself. The weld pool and the electrode are protected
by shielding gas.
Alternating current
The advantage of an alternating current is good oxide break-up capacity when
welding light metals (aluminium, magnesium and their alloys).
The advantages of alternating current are reduced risk of magnetic arc blow and
good oxide break-up capacity when welding aluminium.
Direct current
A higher current produces a wider weld pool, with better penetration into the workpiece.
Pulsed current
Pulsing is used for improved control of the weld pool and the solidification process.
The pulse frequency is set so slow 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.
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Parameter settings
1. Slope up
2. Welding current
3. Pulse time
4. Background current
5. Background time
6. Slope down
7. Gas post flow time
8. Balance
9. Frequency
10. Electrode preheating
Slope up
The slope up function means that, when the GTAW 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 event of pulsed current.
Current
Background
time
Pulse current
Background
current
GTAW welding with pulsing.
Pulse time
Time
Pulse time
The time the pulse current is on during a pulse period.
Background current
The lower of the two current values in the event 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”, by which the current falls 'slowly' over a controlled
time, to avoid craters and/or cracks. when a weld is finished.
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Slope down
GTAW welding uses “slope down”, by which 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 value produces more heat on the electrode and better oxide
break-up on the workpiece.
Higher balance value produces more heat to the workpiece and better penetration.
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
The HF function strikes the arc by means of 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 a safe start in a
balanced manner. The electrode preheating time is controlled by a preprogrammed
time in relation to the set welding current. It is possible to set (finetune) the automatic
preheating when on the outer area of the electrode's current range, see
recommended current range below.
The setting range for preheating is 80 - 120 ms, where 100 ms is equal to the basic
value (value on delivery).
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