PATON
VDI-SERIES PRO
DC MMA/TIG/MIG/MAG
-25-
Example
Welding is to be performed with electrode wire 0.8 mm in diameter.
The set wire feed velocity is 5.5 m/min.
The set welding voltage is 18 V.
The voltage pulse amplitude
[Po.P]
is 20 %.
The voltage pulse frequency
[Fr.P]
is 20 Hz (default value).
The duty cycle [dut] is 50 % (default value).
The result is the following:
the welding pulse voltage amplitude will be in the range of
14.4 … 21.6 V. the welding voltage pulse frequency will be 20 Hz, and the pulse length
will be equal to the length of an interval between pulses. If the duty cycle is not equal to
50 %, the pulses will be nonsymmetrical relative to the intervals between pulses, but the
average welding value will be equal to the set welding voltage of 18 V. As a result, the
average heat input to the weld will not change.
If it is required to reduce heat input to the weld, as in welding thin parts, the welding
voltage should be decreased by performing the standard setting operations. In this case,
voltage pulse parameters will be adjusted automatically according to the set welding
voltage, and the operator can control the reduction of the heat input as compared with the
preceding mode by simultaneously varying the voltage pulse amplitude and duty cycle.
The aforementioned parameters should be set differently for different welding processes,
depending on the requirements of the operator.
Operations required to set these parameters for the current welding process are described in Section
6.1.
6. SETTING THE WELDING UNIT
When no button on the front panel of the welding unit is pressed, the digital display of
the unit shows the value of the basic parameter of the current welding process:
1.
Welding current in the manual arc welding process (MMA)
2.
Welding current in the argon shielded tungsten-arc welding process (TIG)
3.
Welding voltage in the semiautomatic arc welding process (MIG/MAG)
Multifunction button
5
on the front panel is designed for performing the following
functions:
1.
When the button is pressed and released fast, the sequential selection of any
function in the current welding process is provided.
2.
If the button is pressed and held more than 5 s, the sequential selection of any
welding process is provided.
3.
If the button is pressed and held for more than 12 s, the return of the values of the
functions and parameters of the welding unit to the default factory values set for of
the current welding process are provided.
Buttons 3 on the front panel are designed for changing the value of the function or basic
parameter selected.
