Setting At Work - Elettro PLASMA 35 INVERTER Betriebsanleitung

This machine is suitable for ELETTRO CF manual torch type P.35 and we do not assume any responsibility in case that a
different kind of torch is used.

3.2 SETTING AT WORK

The unit must be installed by skilled personnel. All fittings must be in conformity with the existing rules and in full
compliance with safety regulations.
WARNING: This equipment does not comply with IEC 61000-3-12. If it is connected to a public low voltage system, it is the
responsibility of the installer or user of the equipment to ensure, by consultation with the distribution network operator if necessary, that
the equipment may be connected.
Connect the air feed to fitting on the air pressure reduction unit P (pict. 2) making sure that pressure is 4,7 bar at least with a minimal
capacity of 90 litres/min. Should air feed come from a pressure reducing unit of a compressor or of a centralized plant, the reducing unit
should be adjusted at the highest out put pressure which should not exceed 8 BAR (8KPax100). Should air feed come from a
compressed air bottle, this should be provided with a pressure regulator; never connect compressed air bottles directly to the
reducing unit! Pressure may exceed the reducing unit capacity and then explode! Check that the mains power supply matches
that indicated on the technical date plate. Connect supply cable Q (pic.2) the yellow-green wire of cable must be connected to an
efficient earth plug of the system, the remaining wires should be connected to the feed line by means of the switch placed , if possible,
close to the cutting area so as to switch the unit off quickly if necessary. The magnetothermic switch capacity or of fuses in series with
switch should be equal or above the current I
specifications on the unit in correspondence to the feed voltage U
absorbed I .
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3.3 USE
Switch the unit on by turning switch N (pic.2) of the mains switch; this is shown by light E (pic.1) which is on. By pressing for a second
the torch button, the compressed air flow is opened. Check that, under this condition, the pressure shown on gauge O (pic. 2) is about
4,7 and 4,8 bar (4,7÷4,8 KPaX100), otherwise adjust it by means of knob of reducing unit P (pic. 2), then lock this knob by pressing it
down. Connect work clamp to the piece to be cut. Set the cutting current by means of the knob C (pic.1). Use the Ø 0,8 mm nozzle.
N.B. Cut quality is greatly improved if the nozzle is kept in contact with the workpiece.
Clean the work piece to ensure good electrical contact of the work clamp. Do not connect work clamp to the material to be removed.
Press torch button to start pilot arc, if cutting does not start after 4 seconds, the pilot arc turns off and the button should be pressed
again to repeat the operation. When possible, the torch should be pulled. Pulling is easier than pushing. Keep torch in vertical position
when cutting. Once cutting is over and after releasing button, air continues to flow out of the torch for about 1 minute so it enables torch
to cool down. It is recommended not to turn the unit off before that time. Should holes be drilled or should the piece be cut starting from
its centre, torch should be tilted and then slowly straighten to prevent molten metal from being spread on nozzle (see picture 4). This
operation should be carried out with material thickness above 1/8" (3 mm). Should circular cut be done it is recommended to use
compass (supplied on request).
N.B. : Avoid keeping the pilot arc uselessly on in air to avoid electrode, diffuser and nozzle consumption.
3.4 CUTTING TROUBLE
1) Insufficient penetration
This may be due to :
• high speed (always make sure that arc thoroughly passes through the piece to be cut and that it is not tilted, when going forward, by a
percentage above 10 ÷ 15°, see picture 5,. It is thus avoided to wear nozzle, see pict. 6, out and to burn the nozzle holder, see
picture 7).
• Excessive thickness of piece (see graph of cutting speed and thickness)
• Work clamp not properly in electric contact with piece
• Worn nozzle and electrode
• Too low cutting current.
N.B. : When the unit does not thoroughly pass through, nozzle is clogged by scums.
2) Cutting arc switches off
This may be due to :
• worn nozzle, electrode or diffuser
• too high air pressure
• too low feed voltage
3) Tilted cutting
When cutting is tilted (see picture 8) switch the unit off, loosen nozzle holder and turn nozzle by a quarter turn, then lock and try again.
Repeat until cutting is straight (see picture 9).
4) Excessive wear of consumable parts
This may be due to :
• too low air pressure with respect to the recommended one.
• excessive burns on the end part of nozzle holder.
absorbed by the unit. The current I
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available. Any extensions should have adequate sections for current
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absorbed is known by reading the technical
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