Telwin Technomig 260 Dual Synergic Bedienungsanleitung Seite 9

machines) to 100 % (high reactance machines). Factory value: 50 %
: Burn-back. (Fig. M-3)
Use to adjust the wire burn-back time when welding is stopped. Settings from 0 to 1
sec. Factory value: 0.08 sec.
: Post gas. (Fig. M-4)
Use to adapt the protective gas outflow starting from when welding is stopped. Settings
from 0 to 10 seconds. Factory value: 1 sec.
7.2.5 T1, T2 and SPOOL GUN torch settings (where available)
The T1, T2, SPOOL GUN torch settings can be edited in two different ways:
- press the button on the control panel (Fig. C-4) where the corresponding LED will
come on;
- press and release, after at least one second, the button for the torch to be used until
the corresponding LED comes on.
8. CONTROLLING THE TORCH PUSH-BUTTON
8.1 Setting the torch push-button control mode (Fig. O)
Both in manual and synergic mode to access the menu, simultaneously press the
knobs (Fig. C1) and (Fig. C2) for at least 1 second and release them. Turn the knob
(Fig. C2) until menu 2 appears. Confirm selection by pressing the knob again.
8.2 Torch push-button control mode
It is possible to set 3 different torch push-button control modes:
2T mode:
welding begins when the torch push-button is pressed and ends when the push-button
is released.
4T mode:
welding begins when the torch push-button is pressed and released, and ends only
when the torch push-button is pressed and released a second time. This mode is
useful for long welding operations.
Spot welding mode:
used for MIG/MAG spot welding with control of welding duration.
9. UNIT OF MEASUREMENT MENU (Fig. O)
Both in manual and synergic mode to access the menu, simultaneously press the
knobs (Fig. C1) and (Fig. C2) for at least 1 second and release them. Turn the knob
(Fig. C2) until menu 3 appears. Confirm selection by pressing the knob again. Now
you can set the metric or imperial units of measurement. Pressing knob C-2 again, you
return to manual (or synergic) mode.
10. INFO MENU (Fig. O)
Both in manual and synergic mode to access the menu, simultaneously press the
knobs (Fig. C1) and (Fig. C2) for at least 1 second and release them. Turn the knob
(Fig. C2) until menu 4 appears. Confirm selection by pressing the knob again; turning
the knob C-2 you can obtain information on the software installed. Pressing knob C-2
again, you return to manual (or synergic) mode.
11. TIG DC WELDING: PROCESS DESCRIPTION
11.1 GENERAL PRINCIPLES
TIG DC welding is suitable for all types of low-alloy and high carbon steel, and heavy
metals such as copper, nickel, titanium and their alloys (FIG. P). An electrode with 2%
Cerium (grey band) is normally used for TIG DC welding with electrode at the (-) pole.
The tungsten electrode must be axially sharpened using a grinding wheel, see FIG. Q;
make sure the tip is perfectly concentric to prevent arc deviation. The electrode must
be ground along its length. This operation must be repeated periodically according
to the use and wear state of the electrode, or when the electrode itself has been
accidentally contaminated, oxidised or used incorrectly. For the welding to be good,
the exact diameter of the electrode must be used with the exact current, see table
(TAB. 5). The electrode normally projects from the ceramic nozzle by 2-3 mm, but can
reach 8 mm for welding edges.
The weld is created by the edges that melt. Filler metal is not needed when welding
suitably prepared thin material (up to about 1 mm) (FIG. R). A greater thickness
requires rods made from the same material as the basic material
and with a suitable diameter, with edges that have been suitably prepared (FIG. S).
For welding to be successful, the pieces must be carefully cleaned and free from
oxide, grease, oil, solvent, etc.
11.2 PROCEDURE (LIFT STRIKE)
- Use the knob C-1 to adjust the welding current at the required value;
Adjust the current during welding to the true thermal ratio that is required.
- Make sure the gas is flowing correctly.
The arc ignites through contact, distancing the tungsten electrode from the
workpiece. Igniting in this manner causes less electric-irradiated disturbances and
reduces tungsten inclusions and electrode wear to a minimum.
- Place the tip of the electrode on the workpiece, pressing gently.
- Immediately lift the electrode by 2-3 mm to obtain the ark strike.
The welding machine initially supplies reduced current. After a few seconds, the set
welding current is issued.
- Quickly lift the electrode from the workpiece to interrupt welding.
11.3 LCD DISPLAY IN TIG MODE (Fig. C)
- TIG operation mode;
Welding values;
welding voltage;
welding current.
12. MMA WELDING: PROCESS DESCRIPTION
12.1 GENERAL PRINCIPLES
- It is essential to follow the recommendations provided by the manufacturer on the
electrode packaging which indicates the correct electrode polarity and relative rated
current.
- Welding current is regulated to suit the diameter of the electrode being used and the
type of soldering to be performed; an example of the currents used for the various
electrode diameters can be seen below:
Ø Electrode (mm)
1.6
2.0
2.5
3.2
4.0
5.0
6.0
- One can see that for the same diameter electrode, high levels of current will be
used for flat welding, whilst lower current levels will be used for vertical or overhead
welding.
- The mechanical characteristics of the welded joint are determined by the intensity
of the selected current and also other welding parameters such as the length of the
arc, the operating speed and position, the diameter and quality of the electrodes
(to ensure correct conservation, use special packaging or containers to store and
protect the electrodes against humidity).
WARNING:
Instability of the arc due to the composition of the electrode can occur, depending on
the brand, type and thickness of the electrode coatings.
12.2 Procedure
- Hold the mask IN FRONT OF THE FACE, then lightly scratch the electrode tip on the
piece to be welded as if you were trying to strike a match; this is the correct way of
striking the arc.
WARNING: DO NOT TAP the electrode against the piece; this can damage the
coating and make it difficult to strike the arc.
- A soon as the arc is struck, try to maintain a distance from the piece which is
equivalent to the diameter of the electrode being used, and try to maintain this
distance as constant as possible during the welding operations; remember that the
angle of the electrode as it moves forwards should be about 20-30 degrees.
- At the end of the welding seam, move the electrode tip backwards slightly, above the
crater, and fill it in; now quickly lift the electrode from the weld pool to extinguish the
arc (Examples of welding seams - FIG. T).
12.3 LCD DISPLAY IN MMA MODE (Fig. C)
- MMA operation mode;
- Welding values;
welding voltage;
welding current;
- recommended electrode diameter.
Press the knobs (Fig. C1) and (Fig. C2) for at least 1 second and release to access the
advanced parameter settings menu. Each parameter can be set to the desired value
by rotating/pressing the knob (Fig. C2) until you exit the menu.
: this is the initial "HOT START" overcurrent, the display shows the
percentage increase as to the value of the selected welding current. Settings from 0 to
100%. Factory value: 50%.
: this is the dynamic "ARC-FORCE" overcurrent, the display shows the
percentage increase as to the value of the pre-selected welding current. This
adjustment improves welding fluidity, prevents the electrode from adhering to the
workpiece and makes it possible to use different types of electrodes.
Settings from 0 to 100%. Factory value: 50%.
: ON/OFF; this enables or disables the device that reduces the loadless
output voltage (ON or OFF setting). Factory value: OFF. With the VRD enabled,
operator safety increases when the welding machine is on but not in the welding
mode.
13. RESET FACTORY SETTINGS
The welding machine can be taken back to the factory settings by keeping the two
knobs (Fig.C-1) and (Fig.C-2) pressed during starting operation.
14. ALARM WARNINGS
Reset is automatic when the reason for alarm activation stops.
Alarm messages that can appear on the display:
- ALARM 01 and " ": Welding primary thermal switch has tripped. Operations
come to a halt until the machine has cooled down sufficiently.
- ALARM 02 and " ": Welding secondary thermal switch has tripped. Operations
come to a halt until the machine has cooled down sufficiently.
- ALARM 03: overvoltage switch has tripped. Check the power supply voltage.
- ALARM 04: undervoltage switch has tripped. Check the power supply voltage.
- ALARM 10: welding circuit overcurrent switch has tripped. Make sure the feeder
speed and/or welding current are not too high.
- ALARM 11: torch and earthing short-circuit switch has tripped. Make sure the
welding circuit has not short-circuited.
- ALARM 13: no internal communication switch has tripped. If the alarm continues,
contact an authorised repair centre.
- ALARM 18: auxiliary voltage alarm switch has tripped. If the alarm continues,
contact an authorised repair centre.
When the welding machine is switched off, the signal ALARM 04 may appear
for a few seconds.
15. MAINTENANCE
WARNING! BEFORE CARRYING OUT MAINTENANCE OPERATIONS
MAKE SURE THE WELDING MACHINE IS SWITCHED OFF AND DISCONNECTED
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Welding current (A)
Min. Max.
25 50
40 80
60 110
80 150
140 200
180 250
240 270