REHM TIGER 180 AC/DC ULTRA, Руководство по эксплуатации

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Function description
20
4.6.4 Starting current I
s
The settings for the starting current I
s
[4] is performed as described in Section
4.6.1. The starting current is the welding current that is first set after the ignition
process. The setting can be infinitely adjusted between 10% and 200% of the
selected current I
1
(but a maximum of Imax), for example: Starting current 40%
and welding current I
1
100A -> starting current 40A). Selecting the appropriate
starting current enables:

Lower load on the electrode through increasing current flow

Search arc for 4 cycle welding for approaching the start of the seam

Welding with reduced current at the beginning of the seam at edges or sires
of heat accumulation.

Faster heat induction at values above 100%
4.6.5 Current slope-up time t
u
The settings for the current slope-up time t
u
[4] is performed as described in
Section 4.6.1. The current slope-up time is the period in which the welding
current increases linearly from the start current to the preselected current I
1
.
During 2 cycle welding the current slope-up time begins immediately after the arc
is ignited. During 4 cycle welding the slope-up time begins with the release of the
torch trigger 1 with the start of current flow.
4.6.6 Welding current I
1
The settings for the welding current I
1
[4] is performed as described in Section
4.6.1. The setting range for welding current I
1
depends on the selected mode and
type of machine.
4.6.7 I
1
-Pulse time t
1
The settings for the I
1
-pulse time t
1
[4] is performed as described in Section 4.6.1.
TIG welding with the pulse function can be basically divided into two areas:
1. Conventional pulsing with pulse times between 0.1 and 0.5 seconds
2. High-frequency pulsing with pulse frequencies between 10 Hz and 17.5
Hz.
The selection of the welding processes conventional pulse and high-
frequency pulse is made with the push button [8] (see Section
4.9
)
With TIG pulse welding an automatic continuous switching between the currents
I
1
and I
2
occurs during the welding process. In this the selection of which current
is the high current and which the low current can be freely chosen. Fig. 6 shows
the current flow when pulsing.
Fig. 6: Welding current when pulsing
Current I
1
Current I
2
I
1
-Pulse time t
1
I
2
-Pulse time t
2
Time