Telwin HF Serie Manuel D'instructions Et D'entretien page 11

9.0 WELDING OPERATION
9.1 4-STROKE WELDING - DIAGRAM 1
0 Press and hold the gun switch, Elec-
tromagnetic gas valve is turned on. The shiel-
ding gas starts to flow.
0 - t1 Pre-gas time (0.1S)
t1 Striking arc and output start current
(the setting value is 5A.
t2 Loosen the gun switch and output
welding current will rise to reach the set wel-
ding current.
t2 - t3 Welding process. During this period,
the gun switch is released.
t3 - t4 Press the gun switch again. The ou-
tput current will drop to 5A within the pre-set
time.
t4 - t5 Output crater current (the setting va-
lue is 5A).
t5 Loosen the gun switch, stop arc and
argon still keeps on.
t5 - t6 Post-gas time. It can adjust automati-
cally according to the welding current.
t6 The gas valve is turned off. Argon
stops to flow. Welding is finished
DIAGRAM 1
DIAGRAM 2
9.2 2-STROKE WELDING - DIAGRAM 2
0 Press and hold the gun switch, Elec-
tromagnetic gas valve is turned on. The shiel-
ding gas starts to flow;
0 - t1 Pre-gas time(0.1S)
t1 Striking arc and output welding cur-
rent will rise from the initial value of 5A to
reach the set welding current.
t1-t2 Welding process. Hold the torch
trigger.
t2 - t3 Loosen the gun switch and the output
current will drop to 5A according to the pre-
set time.
t3 Stop arc and argon still keeps on;
t3 - t4 Post-gas time. It can adjust automati-
cally according to the welding current.
t4 The gas valve is turned off. Argon
stops to flow. Welding is finished.
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