INE SKYLINE ALU4000 Manuel D'instructions page 31

INE SpA Via Facca, 10 - 35013 Cittadella - PADOVA - ITALIA Tel. 049/9481111 - Fax 049/9400249 - ine@ine.it - www.ine.it
•
Duty cycle: balance between welding current timing
and base current timing (e.g., a 50% duty cycle
means that welding current timing equals the base
current timing, a 30% duty cycle means that the
welding current timing is lower than the base current
timing).
•
Start current: value of initial current or first level (in
Amperes or %).
•
Final current: value of end current or third level (in
Amperes or %).
•
Start time: duration of initial current or first level
(only for 2-level mode and advanced 2-stroke).
•
Final time: duration of end current or third level (only
for 2-level mode and advanced 2-stroke).
•
Current 2: second level current value (in Amperes or
%); only for 2-level mode.
•
Welding time (SPOT): duration of a welding cycle.
•
Tack: duration of initial pulse to start bonding the
pieces, starting from the outer edge without too
much deformation (available only in TIG DC).
•
AC Frequency: frequency (in Hz) of the oscillation
during TIG AC welding.
•
AC Balance: balancing of the duration of the
positive half wave compared to the negative half
wave (e.g. at 50% it means that the duration of the
positive half wave is equal to the negative half wave.
At 30%, the duration of the positive half wave is less
than the negative half wave).
•
Electrode diameter: allows to set the electrode
diameter in AC. This allows to optimise the heating
energy of the electrode in the initial welding phase.
•
MIX DC time: duration of the DC phase in MIX
welding.
•
MIX AC time: duration of the AC phase in MIX
welding.
•
AC shape: allows to choose between triangular,
sinusoidal, square, soft-square waveforms to be
used in TIG AC welding.
The following should be considered when choosing
the appropriate wave form:
Sine wave: it can be considered as a compromise
between quality and noiseless welding.
Triangular wave: it's the most silent among the
three waves; in spite of this it shows the least quality
features.
Square wave: it delivers the best performance in
terms of arc stability, welding accuracy and weld
appearance; the only trouble is that the welding arc is
rather noisy.
Soft-square waveform: provides similar results to
the square waveform, producing less arc noise.
These general considerations may anyway vary
according to the type of material to be welded
(aluminium, magnesium or their alloys); therefore,
it's up to the operator, or to the person who certifies
the welding procedure, to choose the appropriate
wave form according to the type of weld to be carried
out.
•
Maximum current of remote control: allows to set
the maximum value of the current for the remote
control.
With the machine set to TIG AC, in the bottom right
corner of the screen the 'tungsten rounding' function
can be found, which is useful for AC welding.
This is particularly useful for rounding the tip of the new
tungsten electrode.
E1
To do this, tap the icon highlighted by the red circle:
When the weld arc is first ignited, a special current will
automatically round the tip.
Page 29
E2