Wilkinson Star Jasic JT-500D, Руководство оператора

Страница: 24 / 36

24
OPERATION
Before starting any welding activity ensure that you have suitable eye protection and
protective clothing. Also take the necessary steps to protect any persons within the welding
area.
AC pulsed TIG welding
Tc - Cathode current time
Tp - AC period
Tp - Pulsed peak current time
T - Pulse period
AC pulsed TIG welding is almost the same as AC square wave TIG welding and what makes them different
is that in AC pulsed TIG welding, the welding current varies with the pulse peak current and base current.
For the AC square wave parameter selecting and setting, please refer to the corresponding contents in AC
square wave TIG welding. For the pulse frequency and pulse duration ratio, users may refer to the
corresponding contents in DC pulsed TIG welding.
The pulse frequency (1/T) can be adjusted between 0.5Hz and 5Hz. The pulse duration ratio (Tp/T) can be
adjusted between 10% and 90%.
AC frequency
The normal mains frequency of equipment is 50Hz. However, this 500D AC/DC has an output adjustment
range of between 20-70Hz.
Lower AC frequency would provide a soft and less forceful
arc, wider arc with shallow penetration.
Increasing the AC frequency has the effect of concentrating
the arc making it easily directional with deeper penetration.