ENEL 150AC, Руководство пользователя

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6) TIG 2T and 4T welding with alternating current (AC) - the green light
should indicate
AC welding is possible only for TIG welding. Select AC. Using the knob (2)
(Fig. 1) select the diameter of the electrode E1.6, E2.4 or E3.2.
The following parameters can be set for AC within given ranges:
• fac[Hz] - frequency of the alternating current adjustable in the range 50 to
200 Hz with a resolution of 1 Hz
• BAL[%] - balance, the relationship between the positive and negative half
of current signal, adjustable in the range from -70 to +70% with resolution
of 1%. A value of 0% means that positive and negative current half
durations are equal. The balance allows you to control the heat flow
between tungsten electrode and a workpiece material. If the balance is
positive, it means that the positive part of the cycle lasts longer than the
negative one and more heat emits from an electrode than welded
material.
• I+[%] - current of the positive part of the cycle adjustable as a percentage
of the welding current Is within the range 10-100% with a resolution of 1%.
The lights indicating selection of these parameters illuminate in green.
Examples of alternating current signals for different settings of fac, BAL, I+
Every welding mode has its own independent set of parameters
stored in the memory of the control circuit. After the welding machine
is turned on all automatically memorized sets of parameters as well
as the last used operating mode are restored.
The main switch of welding machine (green) is located on the rear panel -
backlight of the key indicates that the power cord is connected to the mains.
After the welding machine is turned on, the green indicator (7) (Fig. 1), digital
display and the red light indicating the last selected operating mode light up.
Is
I+=100 %
Tac=1/fac
BAL=-50 %
Tac=1/fac
BAL=0 %
I+=50 %
Is