Tabla de contenido
3 USE
Make sure the trigger has not been pressed.
Turn the machine on using the switch C. The warning
lamp D will light to indicate that the machine is on.
Press the torch trigger briefly to open the flow of com-
pressed air. Since the arc is not lit, air leaves the torch
for only 5 sec. Now adjust the pressure, shown on the
pressure gauge F, to 3.5 bar (0.35 MPa) using the knob E
on the regulator, then lock the knob by pressing it down-
ward.
Connect the grounding clamp to the workpiece.
The cutting circuit must not be deliberately placed in di-
rect or indirect contact with the protective wire except in
the workpiece.
If the workpiece is deliberately grounded using the pro-
tective conductor, the connection must be as direct as
possible and use a wire of at least the same size as the
cutting current return wire, and connected to the work-
piece at the same point as the return wire using the re-
turn wire clamp or a second grounding clamp placed in
the immediate vicinity. Every precaution must be taken to
avoid stray currents. Use the knob M to adjust the cutting
current from 5 to 30 A based on the work at hand.
Make sure that the earth clamp and the workpiece are
in good electrical contact, especially with painted or ox-
idized metal or with insulated coating; connect the clamp
as close as possible to the cutting area.
Do not connect the grounding clamp to the part of the
material that is to be removed.
Press the torch trigger to strike the pilot arc.
If cutting does not begin within 2 seconds, the pilot arc
goes out; press the trigger again to re-strike it.
Begin cutting.
Hold the torch upright while cutting.
When you have finished cutting and released the trigger,
air will continue to leave the torch for approximately 40
seconds to allow the torch to cool down.
It is best not to turn the machine off until this cool-
down period is complete.
• To cut perforated or grid metal, activate the "Pilot self
restart" function using the push-button P (LED O lit).
When you have finished cutting, holding this push-button
down will cause the pilot arc to restart automatically.
Use this function only if necessary to avoid unneces-
sary wear on the electrode and nozzle.
• Should you need to make holes or begin cutting from
the center of the work-
piece, you must hold the
torch at an angle and slowly
straighten it so that the noz-
zle does not spray molten
metal (see fig. 2). This must
be
done
when
making
holes in pieces more than 3
mm thick.
• Should you need to cut
several layers of metal, as
are normally used in auto
body work, adjust the cut-
ting current to the minimum
values.
For currents between 5 and
10 A it may be helpful to set the intake pressure to ap-
proximately 2 bar.
Turn the machine off when the task is completed.
3.1 REPLACING CONSUMER PARTS
Always shut off the machine before replacing con-
sumer parts.
• The electrode must be re-
placed when it has a crater
in the center approximately
1 mm deep.
• The gas nozzle must be
replaced when the hole is
no longer smooth and the
cutting capacity is dimin-
ished.
• The diffuser must be re-
placed when some areas
are blackened. Due to its
small size, it is very impor-
tant to position it correctly
during assembly (see fig. 3).
• The nozzle holder must
be replaced when the insu-
lating part is deteriorated.
Make sure that the elec-
trode T, the diffuser U
and the gas nozzle V are
mounted correctly, and
that the nozzle holder W is firmly tightened.
If any of these parts are missing, this will interfere
with smooth operation of the machine and, especial-
ly, jeopardize operator safety.=
4 CUTTING ERRORS
4.1 INSUFFICIENT PENETRATION
This error may be caused by the following:
• high speed. Always make sure that the arc fully pene-
trates the workpiece and is never held at a forward angle
of more than 10 -15°. This will avoid incorrect consump-
tion of the nozzle and burns to the nozzle holder.
• Excessively thick workpiece (see cutting charts).
• Grounding clamp not in good electrical contact with the
workpiece.
• Worn nozzle and electrode.
• Cutting current too low.
NOTE: When the arc does not penetrate, the molten met-
al scraps obstruct the nozzle.
4.2 THE CUTTING ARC GOES OFF
This error may be caused by:
• worn nozzle, electrode or swirl ring.
• air pressure too high.
• supply voltage too low.
4.3 SHORTER LIFE OF CONSUMER PARTS
This error may be caused by:
Fig. 2
• oil or dirt in the arc intake,
T
U
V
W
Fig. 3
11
Tabla de contenido
