Paton ProTIG-200, User Manual

Page: 36 / 51

- 35 -
PATON ProTIG DC TIG/MMA
- connect gas socket to fitting 10 ;
- connect torch button socket to socket 9 ;
- connect gas hose to fitting 14 ;
- connect cabel with the « mass » terminal to red socket «+» ( А );
- connect clamping device of the mass to the product;
- connect network plug to power mains;
- switch the mains button/automatic
12 to the position «І»;
- select TIG AC or TIG DC mode on the device by the button «Mode» ( 1 );
- set additional parameters of the mode.
WARNING! After the mode is set up, the device is ready for operation. Pressing the
torch button starts the welding process and in the first seconds the oscillator for high-
frequency arc ignition starts running. At this moment, it is necessary to be especially careful
because of high voltage.
4.1 Cyclogram of TIG AC welding
Symbols:
-
Тр – blowing time before welding. Required for preblowing of a welding zone, torch
nozzle, guaranteed protection before arc ignition;
- Іс – starting current. After preblowing, the arc is ignited on the starting current and
during Tp it rises to Iзв and is used mainly for smooth heating of the workpiece edge to
prevent its flashing;
- Тп – current rise time;
- Ізв – main welding current;
- Тс - welding downslope time; After the end of welding, the main welding current is
gradually reduced to Іzk within Тс . It is used for crater rewelding.
- І zk – end current (crater rewelding);
- В – balance of pulses polarity;
- F – pulses frequency;
- Іп – lower welding current of pulses.
Duirng AC welding, the cyclogram is complicated, because AC parameters are added:
-
В – balance of pulses polarity;
- F – welding current frequency. In manual arc welding machinees, this parameter is
usually adjusted within 20 - 200 Hz.
AC frequency can be increased or decreased within acceptable limits. This parameter
allows the welder to provide larger control over the arc by focusing the arc across the width
so as to be able to weld in hard-to-access places (angles). As well as for welding of thin
products.