Hot-Start And Anti-Stick Functions - Fronius Transpocket 1500 Erdstrom Serviceanleitung, Ersatzteilliste

Measuring and
U
regulating the
92V
parameters
"welding
65V
current" and
"welding
voltage"
40V
(continued)
20V
Fig.10
Legend:
(1)
-
-
-
-
(2)
-
-
-
-
(3)
-
Hot-Start and The TP1500 TIG, TP 1500 RC and TP 1500 power sources are equipped with the Hot-
Anti-Stick Start function, which is permanently activated as long as the "rod-electrode welding"
functions process is selected. As soon as the arc is started, the Hot-Start function increases the
welding current by one-third of the value originally set on the welding-current dial. This
brief increase in the current occurs for a period of 0.5 sec.
Example:
If the pre-set welding current was 90 A, the welding current is increased to 120 A.
Where the pre-set welding current is more than 120 A, the Hot-Start current is limited to
a maximum of 160 A.
Benefits:
- Improved ignition - even when using electrodes with poor ignition properties
- Better base-metal fusion in the start-up phase, meaning fewer fusion defects
- Largely prevents slag inclusions
out
(3)
(2)
Standard characteristic
for electrode
Characteristic / operating ranges of the TP 1500
Continuous operation
When the duty cycle is exceeded:
Power-pack switches off
"Error" indicator lights up
Once the cooling phase has elapsed, the power-pack switches back on again
Operation for max. 2 seconds
If this 2-second period is exceeded:
Power-pack switches off
"Error" indicator lights up
In no-load operation, the power-pack switches back on again
No-load operation
The sawtooth open-circuit voltage (see Fig.7) is applied to the output sockets
If a short circuit takes place, there is a
brief rise in the amperage. In order to
obtain a stable arc, the welding current
Adjustable
also increases briefly, in line with the pre-
short-circuit
set dynamic - e.g. from 140 A to 180 A
dynamic
response (see Fig.10).
(1)
If the electrode is threatening to sink into
the weld pool, this measure prevents the
weld pool from solidifying, as well as
140 A max.180 A
I preventing more prolonged short-circuiting
out
of the arc. This largely eliminates any risk
of the rod electrode "sticking".
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