Tig Dc Apc; Tig Dc Xp - Cebora ARCO Manual De Instrucciones

5

TIG DC APC

This process ensures that a constant heat input to the workpiece is maintained. When the arc length is reduced and
therefore weld voltage is reduced, the current is automatically increased. Conversely, if arc length is increased and
weld voltage increases accordingly, the current is automatically decreased. The operator then controls the heat gain
and penetration just by moving the welding torch.
The current variation amplitude per unit of voltage is adjustable by means of the APC parameter.
E.g. if APC regulation is equal to 20A/V and during welding the welding voltage increases by 1V in relation to the TIG
process nominal voltage, then the current decreases by up to 20A or until the voltage returns to the initial nominal
voltage.
To activate the welding process, press pushbutton Q - Fig� 4 on the main screen and then select DC APC using
encoder B�
The correction value can be set from the main screen or in the Process parameter menu:
Parameters -> APC Regulation
APC Regulation (1 – 80) A/V
The APC process is not available when robot mode is activated.
6

TIG DC XP

TIG DC XP is a welding process where the current pulses at very high frequency and creates a more concentrated and
penetrating weld bath, as well as excellent acoustic comfort. Using this process enables higher welding speeds to be
achieved than with the standard TIG DC process. Using this process, it is possible to set all applicable parameters for
the standard TIG DC process, including pulse.
The welding parameters to be set are the same as for the TIG DC process see Tab1.
To activate the welding process, press pushbutton Q - Fig�4 on the main screen and then select DC XP using
encoder B�
The only difference between the TIG DC and TIG DC XP processes is the pulse function.
For TIG DC XP, the maximum frequency is 300 Hz while for TIG DC it is 2.5 kHz. Refer to Table 1 for the parameter
settings.
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Select the display pushbutton shown in the figure and turn encoder B to
set the desired correction value.
NOTICE
Menu -> Process