Connection And Preparation Of Equipment For Gas Tungsten Arc Welding (Tig) Lift; Controls: Position And Functions; Front Panel; Maintenance - Oerlikon CITOARC 1900i Instrucciones De Seguridad, Empleo Y Mantenimiento

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1. Fit the selected electrode to the electrode clamp.
2. Connect the ground cable quick connection to the negative (-) receptacle
and locate the clamp near the welding zone.
3. Connect the electrode cable quick connection to the positive (+) receptacle.
4. Use the above connection for straight polarity welding; for reverse polarity
turn the connection.
5. On the unit preset for coated electrode welding.
6. Adjust welding current with ampere selector (Rif.6 - Fig. 1 page 3) .
7. Turn on the power source.
2.5 CONNECTION AND PREPARATION OF EQUIPMENT FOR GAS TUNGSTEN
ARC WELDING (TIG) LIFT.
• TURN OFF WELDER BEFORE MAKING CONNECTIONS.
Connect all welding accessories securely to prevent power loss. Carefully fol-
low safety precautions.
1.On the unit preset Lift TIG weldin (Rif.4 - Fig. 1 page 3) .
2.Fit the required electrode and nozzle to the electrode holder
(Check the protrusion and state of the electrode tip).
3. Connect the ground cable quick connection to the positive (+) receptacle
and the clamp near the welding zone.
4. Connect the torch power cable connector to the negative receptacle. (-) .
5. Connect the gas hose to the regulator located on the gas cylinder.
6. Check that there are no gas leaks.
7. Adjust welding current with ampere selector Réf. 6 - Fig. 1 page 3) .
Check gas delivery; turn gas cylinder knob to regulate flow.
NB: The electric welding arc is struck by lightly touching the workpiece with
the electrode (Scratch start).
CAUTION: When working outdoors or in windy conditions protect the flow
of shielding gas or it may be dispersed with resulting lack of protection for
the weld.

3.0 CONTROLS: POSITION AND FUNCTIONS

3.1

FRONT PANEL

Figure 1.
4
1. SOCKET REMOTE CONTROL (Rif.1 - Fig. 1 page 3) Remote control device.
This is supplied on request and, when connected, allows for remote varia-
tion of the amount of current necessary so that the operator does not have
to interrupt welding or abandon the work area.
2. FAULT LED (Yellow) (Rif.2 - Fig. 1 page 3) : Illumination of the yellow LED
on the front panel indicates a overheating caused by an excessively intense
duty cycle. In this case, stop the welding and leave the power source
switched on until the LED switches off indicating normalisation of the tem-
perature. In case of line voltage problems, the power switch inside the
machine will be disconnected in order to avoid problems in the power area.
3. ARC FORCE CONTROL (Rif.3 - Fig. 1 page 3) : modified the generator cha-
racteristics during the deposit of material on the work piece: to means the
use of this function during short circuits it is possible to total an adjustable
current value from 0 to 100% of the set current, in order to accelerate the
All manuals and user guides at all-guides.com
CONTROLS: POSITION AND FUNCTIONS
2
5 6
3 1
material depositing process. This potentiometer is only enabled with the
process selector in selection:
4. PROCESS SELECTOR (Rif.4 - Fig. 1 page 3) :
welding can be used with rutile, basic electrodes, and specially coated
electrodes in particular: cellulosic (Including citoflex siderotermica), citoba-
sics and all other brands. Because of the excellent dynamics, welding with
all special electrodes produces exceptional result.
LIFT TIG PROCE-
DURE
In this position the
TIG welding pro-
cess with lift mode
ignition can be selected, as
described previously.:
To ignite the arc, when TIG wel-
ding,proceed as fo lows: Touch
the welding piece with the
electrode; this will cause a
shortcircuit between the piece
(2) and the electrode (1). Lift
off the electrode;
the arc will ignite. The integrity
of the electrode tip is guaran-
teed by the low ignition current
during short-circuiting between
the welding piece and the
electrode ignition is guaranteed
even at minimum welding cur-
rent settings; the operator can
therefore work without contaminating the ambient with electromagnetic
disturbance, normally caused by high frequency discharges.
The advantages can be this summarised:
l no need for high-frequency startups;
l no damage to the electrode tip during start-ups, regardless of ampere set-
ting, thereby avoiding the presence of tungsten in the welding piece, com-
mon during scratch starting.
5. ARC LED ILLUMINATED (Green) (Rif.5 - Fig. 1 page 3) : this led lights when
the welding current is present.
6. CURRENT REGULATION (Rif.6 - Fig. 1 page 3) : this potentiometer adjust
the welding current range.
NB: the power source is fitted with an anti-sticking device that disables power if
output short circuiting occurs or if the electrode sticks, allowing it to be easily
detached from the workpiece. This device enters into operation when power is
supplied to the generator, even during the initial checking period, therefore any
load input or short circuit that occurs during this phase is treated as a fault and
will cause the output power to be disabled.

4.0 MAINTENANCE

IMPORTANT: Disconnect the power plug and wait at least 5 minutes
before carrying out any maintenance. Maintenance must be carried out more fre-
quently in heavy operating conditions.
Carry out the following operations every three (3) months:
a. Replace any illegible labels.
b. Clean and tighten the welding terminals.
c. Replace damaged gas tubing.
d. Repair or replace damaged welding cables.
e. Have specialized personnel replace the power cable if damaged.
Carry out the following operations every six (6) months:
a. Remove any dust inside the generator using a jet of dry air.
Carry out this operation more frequently when working in very dusty places.
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In this position