Telwin Infinity Plasma 40 Manuel D'instructions page 12

- Choose location verifying that there is a good air flow
and no dust, smoke or gas is present.
- Make sure that obstacles do not prevent the cooling
air flow out of front and rear openings of the machine.
- Arrange an open space of at least 500 mm. around
the machine.
- In case the machine has to be moved always
disconnect the plug from the outlet and gather the
cables and pipes so as not to damage them.
4. CONTROL, WARNING AND SAFETY DEVICES.
POWER SOURCE
Figure (C) See drawing of back and front panel
1- GENERAL SWITCH O - I.
- In position I (ON) the machine is ready for functioning
green signal light and green led indicating mains ON
are lit. Control and duty circuits are fed but there is no
voltage in the torch (STAND BY).
- In position 0 (OFF) any functioning is inhibited,
control devices and warnings light are off.
2- CUTTING CURRENT POTENTIOMETER (Fig. D)
It allows to set the intensity of cutting current supplied
by the machine according to the use (thickness of
material/speed). See TECHNICAL DATA for proper
relation of intermittence on/stand by to be adopted
according to selected range. (period = 10 min.).
3 - P R E S S U R E R E G U L A T O R ( P L A S M A
COMPRESSED AIR).
4 - GAUGE.
- Use the knob (turn and twist to release) to adjust
pressure untill you come to the value shown on
TORCH TECHNICAL DATA.
- Read requested value (bar) on gauge (4); push knob
to lock the adjustment.
5 - ENERGIZED TORCH (YELLOW SIGNAL LIGHT).
- When lit it shows that cutting circuit has been
activated: Pilot arc or cutting arc "ON".
- It is usually off (disengaged cutting circuit) with non
activated torch button (stand by).
- It is off, with torch button pushed, under following
conditions:
-During PREGAS (0.3s) and POSTGAS (>30s)
phases.
-If the pilot arc is not moved to the part within max. 2
seconds.
-If the cutting arc interrupts because it is too far from
the torch-part, or the electrode is worn out, or the
torch has been forced away from the part.
-In presence of a SECURITY system.
6- THERMAL SWITCH AND MAINS VOLTAGE
FAULT (RED LED - General alarm)
- When lit it shows overheating of the power
transformer or fault of the input mains voltage
(undervoltage or overvoltage).
- During this phase the functioning of the machine is
inhibited.
- Restoration is automatic (the red lamp turns off)
after 4s (i.e. soon after when one of the above faults
is within the required limits again).
7- AIR PRESSURE FAULT (YELLOW SIGNAL LED
AND RED SIGNAL LED - GENERAL ALARM"ON" AT
THE SAME TIME )
- When lit it indicates that air pressure is not enough
for proper functioning.
- During this phase, the functioning of the machine is
inhibited.
- Restoration is automatic (the led
pressure has lowered within required limits.
8- TECHNICAL DATA TABLE
a Cutting circuit data
- No-Load voltage (U0).
- Cutting voltage and current (l2 / U2)
- Use intermittence ratio (X) b
- Phase number
- Thermic insulation class
- Cooling type
- Case protection degree
- Mains voltage and frequency (U1 / Hz)
- Absorbed apparent current/power (l1 / S1) and
relevant power factor (cosph ) .
- Delayed fuses to be used.
TORCH
The torch button is the only control device which can
start and stop cutting operations.
When button is released the cycle is immediately and
always stopped with the exception of cooling air (post-
air).
Accidental manoeuvres: in order to start cycle button
must be pushed at least 300 ms.
5. CUTTING OPERATIONS
PRELIMINARIES.
- Check and follow instructions as foreseen in the
paragraphs 1 SAFETY and 2 INSTALLATION of
the present instruction manual.
- Close (bring to position I) automatic mains switch
and general machine switch in sequence.
- Choose, by turning the cutting current potentiometer,
the most suitable position to the work
performed.
- Push and release torch button causing air outflow
( 30s post air).
- During this phase, set air pressure till gauge
indicates value in "bar" requested according to the
torch in use (see TECHNICAL DATA).
- Let air outflow terminate spontaneously to facilitate
removal of condense which settled on the torch.
CUTTING
Cutting mode:
With torch you can work with contact nozzle o with
distance nozzle (spacer supplied with machine)
WARNING !
Contact cutting performed when not foreseen may
cause the torch nozzle to wear fast.
- Bring torch nozzle near the edge of the piece (3 mm.)
push torch button; after about 0.3 seconds (preair)
the pilot arc ignites (max 2 seconds). If distance is
correct the pilot arc moves immediately to the piece
generating the cutting arc.
- Draw torch above surface of the piece along the ideal
cutting line, moving smoothly forward.
- Adjust cutting speed according to thickness and
selected current, verifying that the arc jutting out of
inferior surface has a 5-10 degree tilting to the
opposite side of direction.
Figure (E) the drawing shows torch position on part
- 12 -
turn off) after
Mains Data
to be