Telwin ELECTROMIG 330 WAVE Manual De Instrucciones página 9

- : Post-gas. Use to adapt the protective gas outflow starting from when
welding is stopped.
- : Welding current SLOPE DOWN. Used to gradually reduce the current on
releasing the torch button.
N.B.: The current welding parameters, wire feeding speed and material thickness are
related to each other based on a synergic curve.
The actual welding settings (wire speed, welding current and voltage) are shown in the
top section of the display.
7.2.1 ATC Mode (Advanced Thermal Control)
This is enabled automatically when the thickness selected is less or equal to 1.5 mm.
Description: the particular instantaneous control of the welding arc and the ultra rapid
correcting of parameters minimize current spikes, something that is characteristic of
Short Arc transfer procedures, to the advantage of a low thermal load on the piece
to be welded. The result, on the one hand, is reduced deformation of materials and,
on the other, a fluid and accurate transfer of the weld material and the creation of a
welding seam that is easy to model.
Advantages:
- easy welding of thin materials;
- decreased deformation of material;
- stable arc even when working with low currents;
- rapid and accurate spot welding;
- easier coupling of spaced sheets.
7.2.2 Using the spool gun
All the settings procedures (material, wire diameter, gas type) are described above.
The spool gun knob (Fig. I-5) adjusts the wire speed (and the welding current and
thickness simultaneously). The user only has to adjust the arc voltage via the display
(if necessary).
7.3 AB Pulse operating mode
Pulse mode settings (Fig. L-6).
Press and hold the knob C-5 for at least 3 seconds to access the material, thread
diameter and gas type settings menu. (Fig. L-4). The welding machine sets itself
automatically in the best operation conditions established by the different synergy
curves that are saved. The user only has to select the material thickness to begin
welding.
An additional two parameters are available compared to the synergic operating mode:
- : Inrush current.
- : Duration of inrush current. If the parameter is set to zero, this function is
disabled.
7.4 AB PoP (PULSE on PULSE) operating mode
Pulse mode settings (Fig. L-7).
PoP mode is used to perform pulse welding with 2 current levels (I
duration of T2 and T1 respectively.
The following variables are available compared to the PULSE operating mode:
- : Secondary welding current;
- : Secondary arc correction according to preset arc voltage;
- : Secondary wire feed speed;
- : Secondary material thickness;
- : Duration of I current;
2
- : Duration of I current.
1
7.5 ROOT MIG operating mode
ROOT MIG mode settings (Fig. L-8).
The settings available are the same as those for synergic mode (see 7.2).
8. CONTROLLING THE TORCH PUSH-BUTTON
8.1 Setting the torch push-button control mode (Fig. L-9)
Press the knob (Fig. B-5) for at least 3 seconds to access the parameter settings
menu.
8.2 Torch push-button control mode
It is possible to set 4 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.
4T Bi-Level mode
Welding begins when the torch push-button is pressed and released. Each time it is
pressed/released it switches from current (I
versa. It only terminates when the torch push-button is pressed for a certain set time.
Spot welding mode
Used for MIG/MAG spot welding with control of welding duration.
9. WELDING WITH G.R.A. (for 270A version only).
The welding machine recognizes automatically the G.R.A. connection. On the display
there appears the symbol
is activated. It is possible to disable the G.R.A. function, by following the instructions
reported in chap. 12. In this case on the display there appears the symbol
10. MMA WELDING: PROCESS DESCRIPTION
10.1 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
- 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.
10.2 PROCEDURE
- Keeping the mask IN FRONT OF YOUR FACE, rub the tip of the electrode on the
piece to be welded, moving as if striking a match; this is the most correct method for
igniting the arc.
WARNING: DO NOT TAP the electrode against the workpiece, which could
and I ) with a
2 1 damage the coating and make arc striking difficult.
- As soon as the arc has struck, try to keep the electrode at a distance from the
workpiece that is equivalent to the diameter of the electrode being used, and keep
this distance as constant as possible while welding; remember that the electrode
angle while moving forward must be approx. 20-30 degrees.
- At the end of the welding seam, take the electrode end slightly back as to the forward
direction, above the crater to fill it, then quickly lift the electrode from the weld pool
to switch off the arc (Aspects of the welding seam - FIG. M).
10.3 MMA mode settings (Fig. L-10)
The user can customise the following welding parameters (Fig. L-11):
: Welding current measured in Amperes.
-
- : This is the initial "HOT START" overcurrent, the display shows the
percentage increase as to the value of the selected welding current. This adjustment
improves starting.
- : 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.
- : ON/OFF: this enables or disables the device that reduces the loadless
output voltage (ON or OFF setting). With the VRD enabled, operator safety increases
when the welding machine is on but not in the welding mode.
The actual welding settings (welding current, voltage and the diameter of the
suggested electrode) are shown in the left section of the display.
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. N). 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. O;
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. P).
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. Q).
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 B-5 to adjust the welding current to the required rate; adjust this value
- 9 -
symbol) to current (I
2 1
. When the torch pushbutton is pressed, the G.R.A.
Welding current (A)
Min.
25
40
60
80
symbol) and vice-
.
Max.
50
80
110
170