Mma Welding; Welding Task Selection; Hotstart - EWM T4.02 Operating Instructions Manual

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5.2

MMA welding

5.2.1

Welding task selection

It is only possible to change the basic parameters when no welding current is flowing and any
possible access control is disabled > see 5.4 chapter.
The following welding task selection is an example of use. In general, the selection process always has
the same sequence. Signal lights (LED) will show the selected combination.
5.2.2

Hotstart

The function hot start ensures a secure igniting of the arc and a sufficient heating to the still cold parent
metal at the beginning of the welding process. The ignition takes place here with increased current (hot
start current) over a certain time (hot start time).
099-00T402-EW501
02.07.2020
Setting/selection
Ignition type (TIG)
------- HF start active (ex works)
------- Lift arc ignition active
A = Hot start current
B = Hot start time
C = Main current
I =
t =
Functional characteristics
Figure 5-34
Current
Time
Figure 5-35
MMA welding
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