Inverter TIG Manual De Instrucciones página 8

Low Welding Current Level in 4T-BILEVEL mode,
adjustable as a percentage of the main current.
Peak current in PULSE mode.
Duration, in seconds, of the period of the peak
current.
Background current in PULSE mode, adjustable
as a percentage of the peak current.
Duration, in seconds, of the period of the
background current.
Foot pedal control socket.
Foot Pedal Control connection pilot lamp.
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Some functions and parameters on the remote control
are not selectable when the foot pedal control is
connected: the corresponding LED will not illuminate.
MMA welding mode will inhibit the foot pedal control
(Foot Pedal Control connection pilot lamp off).
TIG welding is allowed only in TIG 2T (B3) both in
continuous mode (D1) and pulsed mode (D2).
Thermal cutout signal. The warning light switched
on means that the thermal protection is running
Fault indicator lamp.
Red LED flashing (TIG only): indicates that the machine was
switched on (or the thermal protector has reset) with the torch
trigger kept pressed: release the trigger to restart operations.
Red fixed LED on: microprocessor error, switch off the
welding machine then switch it back on again. If, after doing
so, the welding machine continues to show an error, take it to
an assistance centre for a check-up.
Mains voltage pilot lamp.
Green LED intermittent (slow): indicates that the machine is
connected to mains, in STAND BY mode.
Green LED permanently illuminated: indicates that the
machine is connected to mains and switched "ON".
Green LED intermittent (fast) indicates that a momentary
mains interruption has occurred.
Operational welding examples
The remote control allows to control every single parameter
involved in each different welding process: it is possible to
schematize its action with the following examples.
TIG 2T HF Continuous (A2)+(B3)+(D1)+(C2) -Fig. 1-:
In the following sequence, as the torch trigger is pressed and
kept pressed:
¾ The shielding gas will flow according to the selected "PRE-
GAS" time.
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¾ "HF" will start to strike the arc at the selected "I Start"
¾ "SLOPE-UP" ramp will be enabled until the main current
"I" has established.
In the following sequence, as the trigger is released:
¾ "SLOPE-DOWN" ramp will be enabled until the welding
current has dropped to its final value "I Stop", then the arc
will extinguish.
¾ The shielding gas will continue to flow according to the
selected "POST-GAS" time.
¾ If the torch trigger is pressed again during the "SLOPE
DOWN" time, the welding current will switch to main value "I".
When in "LIFT" arc striking (C1), the tip of the electrode
should be kept in contact with the workpiece BEFORE
the torch trigger is pressed; once "PRE-GAS" time has
expired, lift the torch to strike the arc and the cycle will start
as described above.
TIG 4T, HF, Continuous, Bilevel, (A2)+(B1)+(B2)+(C2)+(D1)
-Fig. 2-
In the following sequence, as the torch trigger is pressed and
kept pressed:
¾ The shielding gas will flow according to the selected "PRE-
GAS" time.
¾ "HF" will start to strike the arc at the selected "I Start"
¾ As the trigger is released:
¾ "SLOPE-UP" ramp will be enabled until the main current
"I" has established.
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If "BILEVEL" mode is enabled, a quick "press-and-
release" of the torch trigger will alternatively switch the
welding output from main current "I" to the selected Low
Current Level.
To stop welding, as the torch trigger is pressed and kept
pressed:
¾ "SLOPE-DOWN" ramp will be enabled until the welding
current has dropped to its final value "I Stop".
¾ As the trigger is released:
¾ The shielding gas will continue to flow according to the
selected "POST-GAS" time.
TIG 2T HF, Spot Pulse, (A2)+(B3)+(B4)+(C2)+(D2) -Fig. 3-
In the following sequence, as the torch trigger is pressed and
kept pressed:
¾ The shielding gas will flow according to the selected "PRE-
GAS" time.
¾ "HF" will start to strike the arc at the selected "I Start".
¾ "SLOPE-UP" ramp will be enabled until the main current
"I" has established.
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When "PULSE" mode is enabled, the welding current is
not constant, but is made of a sequence of HIGH pulses
("I Peak" current with "T Peak" duration) and LOW pulses
("I Background" current with "T Background" duration).
In the following sequence, as the selected "SPOT TIME" has
expired:
¾ "SLOPE-DOWN" ramp will be enabled until the welding
current has dropped to its final value "I Stop", then the arc
will extinguish.
¾ The shielding gas will continue to flow according to the
selected "POST-GAS" time.
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The welding cycle will stop even though the torch trigger is
kept pressed; to restart welding it is necessary to release
and press the torch trigger once again.
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