PATON
ProMIG series
DC MMA/TIG/MIG/MAG
- 12 -
See paragraph 6.1 for sequence of changing the value of any function in the current
welding mode
3.4 ANTI-STICK FUNCTION
During initial arc striking, the electrode can stick or be tacked to the work piece.
Many functions of the machine resist this occurrence, but it is possible nevertheless,
first leading to overheating and eventually to damage of the electrode.
In such a case, this machine actuates the built-in Anti-Stick function, which is
constantly operating in the MMA mode. Within 0.6...0.8 s after detection of this
condition, this function reduces arc current. In addition, this function helps the
welding operator to separate (detach) the electrode from the work piece without
risk to burn his eyes with accidental arc striking. Once the electrode is separated
from the work piece, the process of welding can be readily resumed.
3.5 FUNCTION OF SLOPE ADJUSTMENT FOR A CURRENT-VOLTAGE CURVE
This function is primarily designed for convenient welding using electrodes with
different types of coating. By default, current-voltage curve slope [CVS] is set to
1.4V/A, which corresponds to the most commonly used electrodes with rutile
coating (АНО
-
21, МР
-3). For more convenient work with basic-coated electrodes
(УОНИ
-
13/45, ЛКЗ
-70), it is recommended, although not required, to set the slope
[CVS] to 1.0V/A. On the other hand, cellulose electrodes (ЦЦ
-
1, ВСЦ
-
4А) even
require for setting the slope [CVS] to 0.2...0.6V/A, and sometimes it is also necessary
to rise trigger level of the Arc Force Function [u.AF] up to 18 V. See paragraph 6.1 for
sequence of changing the value of any function in the current welding mode
3.6 SHORT ARC WELDING FUNCTION
This function is especially important for overhead welding, when very long arc is
undesirable. For this purpose, the machine provides the possibility to set the Short
Arc function [Sh.A] to "ON" position. By default, it is set to "OFF" position. See
paragraph 6.1 for sequence of changing the value of any function in the current
welding mode
3.7 FUNCTION OF AN OPEN-CIRCUIT VOLTAGE REDUCTION UNIT
When performing welding works in vessels, tanks and applications requiring for
enhanced electric safety system, one can enable the function of open-circuit voltage
reduction.
In 0.1 s after the electrode is detached from the work piece, voltage on the
source terminals drops to safe level below 12 V.
To enable this function, an open-circuit voltage reduction unit [BSn] is required.
This unit is envisaged in this equipment model, but is set to "OFF" position by
default, i.e. disabled, since it is known, that enabling of any function of this kind
