Design and function
MMA welding
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099-002032-EW501
15.10.2018
• Insert cable plug of the electrode holder into either the "+" or "-" welding current connection socket and
lock by turning to the right.
• Insert cable plug of the workpiece lead into either the "+" or "-" welding current connection socket and
lock by turning to the right.
Polarity depends on the instructions from the electrode manufacturer given on the electrode packaging.
5.2.2
Welding task selection
?
Figure 5-8
5.2.2.1 Arcforce (welding characteristics)
During the welding process, arcforce prevents the electrode sticking in the weld pool with increases in
current. This makes it easier to weld large-drop melting electrode types at low current strengths with a
short arc in particular.
Electrode type allocation
Item
Electrode type
a)
R
rutile
b)
RB
rutile basic
c)
B/RC
basic and rutile/cellulose
d)
C
cellulose
Figure 5-9
The electrode characteristics you can select at the machine control are guidíng values. Each
characteristics can be optimised according to electrode type and the related welding
properties.
> see 5.6 chapter
.
5.2.3
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).
A = Hot start current
B = Hot start time
C = Main current
I =
Current
t =
Time
Figure 5-10
