Paton PSI 160 Standard, Руководство пользователя с гарантией

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13 | P a g e
PATON
®
PSI STANDARD SERIES DC MIG/MAG TIG/MMA
improve the conditions for arc starting (when the welding unit is connected to a reliable power supply
system).
What is achieved by:
During the short time interval of arc starting, the welding current increases by 33% of the welding current
set by default.
Example: Electrode diameter is 3 mm. Set welding current is 90 A. The current at the increased-current
arc starting stage is 90 + 30% = 120 A
The additional adjustment operations allow both the arc starting current
[POWER HOT START]
and the
arc staring period
[TIME HOT START]
to be varied. Do not set the increased values of these parameters if
such increased values are not required, because the operation of the welding unit and reliable arc starting
in these conditions are possible only if the welding unit is connected to a high-power system.
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.
3.4. REDUCED – VOLTAGE WELDING MODE “ARC – FORCE”
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 slightly
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 also 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.
How it is achieved:
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 next Section).