All possible precautions must be taken in order to avoid stray current.
Connect gas pipe to pressure reducer output connected to an ARGON cylinder.
Regulate gas flow adjusting the regulation knob on the torch handle.
Inside the torch handle a valve allows the gas flow to be shut.
Use a 2% thoriated tungsten electrode having a diameter chosen according the negative electrode direct current (Argon) value
as follows:
up to 60A diam. 1 mm
60A to 180A diam. 1.6 mm
180A to 250A diam. 2,4 mm
The electrode tip should be prepared for welding according to procedure indicated hereafter.
Check the main supply voltage to match the voltage on the power supply technical specification tag.
Connect main supply cable: when mounting a plug make sure that its capacity is adequate and that the yellow-green wire of the
mains cable is connected to the earth plug pin.
The capacity of the magnetothermic switch or the fuses in the mains supply line should be higher than or equal to current I
1
absorbed by the unit.
The absorbed current I
1
is determined by dividing by 1.6 the value stated on the table.
Any extension cord should have a section adequate for the absorbed current I
1
.
Set welding current based on the weld to be performed then adjust the gas flow with knob on torch handle.
Start the arc, by contact, with a quick scratch on the surface to be welded.
CAUTION do not use commercial ignition devices.
The TIG torch is designed in such a way that using the valve on the torch body the gas flow can continue after the weld is
performed to protect the electrode while it is still hot.
After the proper amount of time /few seconds) the gas flow can be stopped by shutting the valve on the torch handle.
Once welding is finished the unit is to be turned off and the gas cylinder valve is to be closed.
TIG HF
On the front of the control panel the following can be found
1. Welding current regulation potentiometer
2. Holder/torch and earth sockets
3. Current manual setting/remote control lever switch
4. TIG/MMA welding lever switch
5. Digital A-meter to read the current draw upon arc ignition
6. Current rise time regulation knob
7. Current fall time regulation knob
8. Current Post-gas time regulation knob
9. Socket for remote control connection
10. 2 time/4 time operation mode lever switch
11. Gas outlet
12. Torch push-button connector
Five LED warning lights on the left side of the front panel signal the following, respectively:
A. Generator under voltage (GREEN LED)
B. Line surge or overheating (YELLOW LED)
C. High frequency igniter on (RED LED)
D. Argon gas supply (GREEN LED)
E. Inverter on (YELLOW LED)
This welding machine is suitable for TIG welding of inox steel, iron and copper. Connect the earth cable connector to the positive
terminal of the welding machine and the clamp as close as possible to the welding spot, making sure good electrical contact is
made. Use the special TIG torch (for HF ) and connect the power connector to the negative terminal of the welding machine. The
welding circuit must not be put into direct or indirect contact with the safety conductor except on the work piece. If the work piece
is deliberately earthed through the safety conductor having a section equal to or greater than that of the welding current return
conductor connected to the work piece at the same point as the return conductor with the return conductor clamp or another
earth clamp next to it. Take the utmost care to avoid welding stray currents. Connect the gas inlet on the rear panel of the
generator to the output of the pressure reducer connected to an argon cylinder. Adjust the gas pressure by means of the flow
meter. Use a 2% thoriated tungsten electrode chosen according to the following table:
up to 60 A
1.0 mm
from 60 A to 180 A
1.6 mm
The preparation of the electrode tip should be done as explained in the following. Check that the supply voltage is the one
indicated on the technical specification plate of the welding machine. Connect the power cable. Switch on the welding machine
by closing the power switch on the rear panel; adjust the current according to the job to be carried out, set switch 2/4T to 4T
mode, set the current rise and fall times as preferred and the post-gas time; then bring the electrode within 3 mm approximately
from the work piece and let out a pulse upon pressing the torch push-button (press and release it). The following will occur:
1. Gas is let out and the relevant LED lights up. (LED D)
2. The high frequency circuit stars (within a second or so and ignites an arc) (LED C)
3. Current rises until it reaches the value set, as the A-meter will show.
At this stage, the generator will keep the arc going until another pulse is applied upon pressing the torch push-button. The
following will then occur:
4. Current starts falling.
5. The arc nearly extinguishes itself.
6. The post-gas phase starts.
It a relatively long current fall time was set, and one does not wish to wait for automatic extinction of the arc, another pulse may
be applied to stop welding at any moment.
However, if the 2T mode selected, the torch push-button must be kept depressed during arc ignition, current rise and welding,
and then released to allow current fall and arc extinction.
This generator uses an inverter of the seventh generation (the latest available, as there are no other single-card technology
inverters of the same power at 90 kHz) and therefore incorporates the following exclusive capabilities and devices.
MMA Process
7
