13 | P a g e
PATON
®
ADI 200 STANDARD TIG/MMA MIG/MAG
3.4 REDUCED – VOLTAGE WELDING MODE
The advantages ensured by the reduced-voltage welding function are the following:
1.
Improved arc stability in short arc welding mode
2.
Improved transfer of molten metal drops into the welding pool
3.
Improved arc starting
4.
Reduced probability of electrode sticking
(see Section 3.5)
Manual adjustment operations
allow the minimum welding voltage to be set in order to decrease
power consumption and heat input to the weld when welding thin parts. As a result, the probability
of burn-out is decreased, but the stability of arc in short arc welding mode is also decreased, as the
welding unit functions as an arc-welding transformer. It is possible to increase the voltage reduction
percentage to the maximum value in order to improve the stability of arc in short arc welding mode
(when the welding unit is connected to a reliable power supply system), but the increased current in
this mode can cause burn-out when welding thin parts. Therefore, it is recommended to set the
minimum voltage reduction percentage.
What is achieved by:
When the arc voltage drop is lower than the minimum voltage required for stable arcing, the
welding current increases by 40 % relative to the set current.
The additional adjustment operations
allow both the welding voltage reduction percentage
[
POWER ARC FORCE
]
and the voltage reduction period
[
TRESHHOLD ARC FORCE
]
to be set. Do
not set the increased values of these parameters if such increased values are not required, because in
the operation of the welding unit in this condition, specifically in welding with electrodes less than
3.2 mm in diameter, electrode sticking is possible
(see Section 3.5).
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.
