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Helvi PUMA 298 Manuel D'instructions page 22

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c.
In MIG SYNERGIC it displays the thickness of the material to be welded expressed in mm.
5.
Right Display: during welding, it displays the actual arc voltage.
When the machine is not welding (no load), it displays the value of the parameter adjusted with the
Right Knob (7):
a.
in STICK mode it displays the Hot Start over-current value expressed as a percentage of the
base welding current selected with the left knob (8). The over current value is variable from 0 to 50%
of the base current. Maximum Hot start value can not exceed the generator full scale value. On the
display the value of Hot Start is shown as "H" and the value of the over current in %;
b.
In TIG Mode the display is not active;
c.
In MIG MANUAL it displays the selected arc voltage from 12V to 35V;
d.
In MIG SYNERGIC mode the display shows the arc voltage balance; possible variation is +/-
9,9V on the base value adjusted by default ( "0" on the display, right potentiometer in central position).
6.
Selector switch for the Welding Modes Selection: MMA, TIG, MIG manual, MIG Syn.
7.
Right Knob: it is used to adjust the following welding parameters.
a.
in STICK Mode it adjusts the over-current value of the electric arc (Hot Start), variable from 0 to
50% on the current value adjusted with the Left Knob (8);
b.
in TIG Mode it is not active;
c.
in MIG manual it adjusts arc voltage value (no load) from 12V to 35V;
d.
in MIG Syn it adjusts the arc voltage; possible variation is +/-9,9V on the base value adjusted
by default ( "0" on the display).
8.
Left Knob: it is used to adjust the following welding parameters.
a.
in STICK Mode it adjusts the current value from a minimum of 20Amp to a maximum of 250Amp;
b.
in TIG Mode, it adjusts the current value from a minimum of 10 Amp to a maximum of
290Amp;
c.
in MIG manual it adjusts the wire speed in m/min;
d.
in MIG Synergic it selects the thickness of the material to be welded in mm.
9.
Negative socket:
a.
in STICK welding for the connection of the ground cable connector (check for correct polarity
for the electrode you are going to use, refer to the information on its box);
b.
in TIG Welding for the TIG torch cable connection;
c.
in MIG welding (with gas) for the connection of the ground cable connector; in MIG Flux Core
welding (FCAW) for the connection of the male plug for Gas/No Gas voltage change of the torch.
10.
Positive socket:
a.
in STICK welding, for the connection of the ground cable connector (check for correct polarity
for the electrode you are going to use, refer to the information on its box);
b.
in MIG Flux Core Welding (FCAW), for the connection of the ground cable connector; in MIG
welding (with gas) for the connection of the male plug for Gas/No Gas voltage change of the torch.
11.
Euro connect for attaching the MIG torch cable.
12.
Male plug for Gas/No Gas voltage change of the torch.
13.
Input power cable.
14.
ON/OFF Switch.
15.
Gas Hose connector.
16.
Slope up Time regulation potentiometer.
17.
Burn Back Time Regulation Potentiometer (B.B.T.).
18.
Inductance adjustment.
19.
2 Stroke / 4 Stroke selection switch.
20.
4 roll wire feeder.
21.
Spool holder for wire spools.
STICK ELECTRODE WELDING (SMAW)
GETTING READY FOR STICK ELECTRODE WELDING (SMAW).
Select the Stick function (SMAW) with the Selector Switch (6) on the front panel.
Check the electrode packaging to determine the recommended polarity and connect the Electrode
holder and ground clamp to the plus and minus sockets accordingly.
Switch the unit ON thru the ON/OFF switch (14).
Set the welding current with the Left Knob (8) on the front panel and the strike over-current value of
the electric arc (Hot Start) with the Right Knob (7).
Adjustable Welding current: Min 20Amp – Max 250 Amp
TIG WELDING WITH LIFT START (GTAW)
SETTING UP THE EQUIPMENT FOR TIG WELDING
Select the TIG function on the control panel with knob (6).
Connect the TIG torch cable to the negative socket (9) of the welder.
Connect the ground cable connector to the positive socket (10) of the welder.
Connect the TIG torch gas line to the gas regulator, ARGON GAS ONLY
EN-6

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