Design and function
MMA welding
099-002058-EW501
26.11.2015
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5.7.2
Welding task selection
Operating
element
Action
Result
x x
MMA welding signal light illuminated
Main current setting
This completes the basic settings and you can now start welding.
The optimum values for hot start current, hot start time and arcforcing are predefined ex works, but can
be adjusted when necessary- See 5.7.6 Expert menu (MMA) chapter.
5.7.3
Hotstart
The hotstart device improves the ignition of the stick electrodes using an increased hotstart current.
After striking the stick electrode, the arc ignites with hotstart current (iht) for the preset hotstart time (tht)
and then reduces to the main current (AMP).
The parameter values for hotstart current and time can be optimised for the electrode types being used.
For parameter setting, - See 5.7.6 Expert menu (MMA) chapter.
The hotstart device improves the ignition of the stick electrodes using an increased ignition current.
a) =
Hotstart time
b) =
Hotstart current
I =
Welding current
t =
Time
Figure 5-15
5.7.4
Arcforce
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.
For parameter setting, - See 5.7.6 Expert menu (MMA) chapter.
