Helvi HF Série Manuel D'instructions Et D'entretien page 28

9.0 WELDING OPERATION
9.1 4-STROkE WELDING - DIAGRAM 1
Press and hold the gun switch, Elec-
0
tromagnetic gas valve is turned on. The shiel-
ding gas starts to flow.
Pre flow time, adjustment range of pre
0-T1
flow time :0~1.0S.
Striking success, adjustment range of
T1
start current (see Min-Max Amps on data ta-
ble).
Loosen the gun switch, the output cur-
T2
rent slopes up from start current; if the output
pulse function is turned on, the output current
is pulsed.
T2-T3 Output current slopes up to the setting
current value; adjustment range of up slope
time 0~5.0S.
T3-T4 Welding process. During this period,
the gun switch is released.
Note: If the output pulse function is turned on,
the output current is pulsed.
Repress down the gun switch, the
T4
output current slopes down to crater current;
if the output pulse function is turned on, the
slope down current is pulsed.
T4-T5 Down slope time, adjustment range of
down slope time: 0~5.0S.
T5-T6 Crater current holds time; adjustment
range of crater current (see Min-Max Amps
on data table).
Loosen the gun switch, arc stops and
T6
DIAGRAM 1
Set Welding Current Value
Set Base Current Value
Continue Pressure
on the Torch Trigger
DIAGRAM 2
Set Welding Current Value
Set Base Current Value
Continue Pressure on
the Torch Trigger
28
gas keeps on flowing.
T6-T7 TPost flow time, adjustment range of
post flow time: 3.0-10.0S.
T7
gas stops flowing. Welding is finished.
9.2 2-STROkE WELDING - DIAGRAM 2
0
tromagnetic gas valve is turned on. The shiel-
ding gas starts to flow.
0-T1
flow time :0~1.0S.
T1-T2 Striking success, the output current
slopes up to the setting current from mini-
mum current (5A); if the output pulse function
is turned on, the slope up current is pulsed.
T2-T3 During the whole welding process, the
gun switch is pressed and held without relea-
sing.
Note: If the output pulse function is turned on,
the output current is pulsed.
T3
rent slopes down; if the output pulse function
is turned on, the slope down current is pul-
sed.
T3-T4 The output current slopes down to
minimum current (5A). Arc stops; adjustment
range of down slope time: 0~5.0S
T4-T5 Post flow time, adjustment range of
post flow time: 3.0-10.0S.
T5
gas stops flowing. Welding is finished.
Start
Current
Torch Trigger
Release
Arc Striking
Arc Striking
Electromagnetic valve is closed and
Press and hold the gun switch, Elec-
Pre flow time, adjustment range of pre
Loosen the gun switch, the output cur-
Electromagnetic valve is closed and
Second Pressure
on Toch Trigger
Torch Trigger
Crater
Release
Current
Arc Stop
Torch Trigger
Release
Arc Stop