Fronius TP 1500, Руководство по обслуживанию

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23
Welding
current
t
1.5 s
Sticking and burn-out are prevented (Anti-Stick)
Burn-out is prevented (Anti-Stick)
Fig.11 Anti-Stick
Short
circuit
resolves
itself
Short
circuit
does
not
resolve
itself
0.5 s
Short
circuit
160 A
180 A
140 A
Anti-Stick
function
Hot-Start
function
The Anti-Stick function is also available when the “rod-electrode welding” process has
been selected.
In the case of power sources without the Anti-Stick function, the welding voltage may
drop so far when the arc-length is shortened that the rod electrode starts to stick. Also,
this may cause the rod electrode to “burn out”.
“Sticking” of the rod electrode is prevented very effectively by the Anti-Stick function. If a
short circuit occurs, the welding current is increased for a maximum period of 1.5
seconds.
If the short circuit resolves itself, the welding current is lowered back to the value
selected on the setting dial.
The increase in amperage corresponds to the value set for the arc-force dynamic.
If the rod electrode nevertheless begins to stick during this 1.5 second period, the power
source will cut out. This prevents the rod electrode from “burning out”.
Fig. 11 shows the welding-current curve where maximum values have been set for
welding current and arc-force dynamic.
Hot-Start and
Anti-Stick
function
(continued)