14 | P a g e
PATON
®
ADI 200 STANDARD TIG/MMA MIG/MAG
3.5 PROTECTION AGAINST ELECTRODE STICKING
At the stage of arc starting, the electrode can stick to the workpiece and, as a result, the electrode
can be damaged due to overheating. If the electrode has stuck to the workpiece, the welding current
decreases within 0.6 … 0.8 s after the sticking. The temporary reduction in the welding current
makes it easier for the welder to peel off the stuck electrode. After separating the electrode from the
product, the welding process can be resumed without any problems.
3.6 SETTING THE SLOPE OF THE VOLT –AMPERE CHARACTERISTICK
OF THE WELDING UNIT
This function is designed to facilitate welding with electrodes with diverse coatings. By default, the
slope of the volt-ampere characteristic
[
VOLT-AMPER CHARAKTERISTIC
]
of the welding unit is
1.4
V/A.
This value is optimal for the most common electrodes and with rutile coating. In order to
facilitate welding with electrodes with standard coating, it is recommended to set the slope of the
volt-ampere characteristic
[
VOLT-AMPER CHARAKTERISTIC
]
equal to
1.0 V/A
. If electrodes with
cellulose coating are used, the slope of the volt-ampere characteristic should be
0.4 … 0.6 V/A
. In this case, it is sometimes required to increase the threshold value
[
TRESHHOLD
ARC FORCE
]
for the reduced-voltage welding function to 18 V
3.7. SHORT ARC WELDING MODE
This short arc welding mode should be used in overhead position welding, when it is required to
prevent arc stretching. For this purpose, activate
(ON)
the short arc welding function
[
SHORT ARC
MODE
]
of the welding unit. By default, the function is deactivated
(OFF).
The procedure for changing the values of the operational parameters of the welding unit for the current welding
process is described in Section 6.1.
3.8 REDUCTION OF OPEN – CIRCUIT VOLTAGE
When welding works with the manual arc welding process are being performed on vessels, tanks, or
other objects with higher requirements for electrical safety, it is reasonable to use the reduction of
open-circuit voltage function
[
VOLT REDUCTION DEVICE
].
When this function is enabled, the output voltage of the welding unit is reduced to the safe value of
12 V
within
0.1 s
after the detachment of the electrode from the workpiece.
The welding unit model is equipped with this function, it requires an open-circuit voltage reduce
unit
[
VOLT REDUCTION DEVICE
]
but, by default, this function is deactivated (OFF), as the
reduction of open-circuit voltage impairs arc starting
The procedure for changing the values of the operational parameters of the welding unit for the current welding
process is described in Section 6.1
