Function description
29
4.10 Polarity
The push button [15] is used to select the polarity of the DC negative pole (DC),
alternating current (AC), direct current positive pole (DC) and Dual Wave,
whereby the LEDs indicate the selected polarity by illuminating.
When electrode welding it must be noted that on all TIGER DC welding systems
the left output socket is always negative. Insert the electrode holder in the output
socket in accordance with the electrode manufacturer's instructions and adjust.
4.10.1 DC negative minus pole (-)
In TIG welding with direct current negative pole the minus pole is applied to the
left output socket for the TIG torch. TIG welding with direct current is usually
welded with this set-up.
When electrode welding the electrode holder is also connected to the left output
socket. When setting the DC negative electrode welding is performed with the
electrode as the minus pole. When electrode welding the polarity selected for the
electrode depends on the type of electrode being used (observe the electrode
manufacturer's instructions).
4.10.2 Alternating current (~)
When AC welding the polarity at the output terminals is constantly changing back
and forth between positive and negative polarity. When TIG welding the torch is
normally connected to the left output socket. The use of alternating current
enables the welding of aluminium and aluminium alloys.
4.10.3 DC positive positive pole (+)
In TIG welding with direct current positive pole the plus pole is applied to the left
output socket for the TIG torch.
In DC TIG welding the positive electrode is subject to a very high thermal load,
which can result in the electrode melting and damage even at low current.
When electrode welding the electrode holder is also connected to the left output
socket. When setting the DC positive electrode welding is performed with the
electrode as the positive pole. When electrode welding the polarity selected for
the electrode depends on the type of electrode being used (observe the
electrode manufacturer's instructions).
4.10.4 Dual Wave (=/~)
The Dual Wave process from REHM is a combination of AC and DC welding.
When welding this is automatically set by the processor controller at 0.2 seconds
DC and then 0.3 seconds AC. The selected values for the welding current I
1
or I
2
,
the frequency and the balance are taken into account for purely DC or AC
welding.
The Dual Wave process enables better control of the weld pool and is used in
difficult welding positions, when welding workpieces of different thicknesses and
in the processing of thin sheets of aluminium and aluminium alloys.
Содержание TIGER 180 AC/DC ULTRA
Страница 6: ...Introduction 6 1 2 General description Fig 1 TIGER Fig 2 TIGER with integrated Water cooling ...
Страница 58: ...Circuit diagram 58 11 Circuit diagrams Circuit diagram TIGER 230 AC DC ...
Страница 59: ...Circuit diagram 59 Circuit diagram TIGER 230 AC ...
Страница 60: ...Circuit diagram 60 Circuit diagram TIGER 180 AC DC ...
Страница 61: ...Circuit diagram 61 Circuit diagram TIGER 180 DC ...
Страница 63: ...Circuit diagram 63 Circuit diagram TIGER water cooling unit ...
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