Power Source - Telwin TECNICA PLASMA 41 Manual De Instrucciones

LOCATION AND HANDLING OF POWER SOURCE
- 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 on a level surface
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.
- Check for the belt to be set in the correct position for lifting
the machine (Fig. L).
CONTROL, WARNING
DEVICES.

POWER SOURCE

Figure (C) See drawing of back and front panel
1. GENERAL SWITCH O - I. (Fig.C-1
In position I (ON) the machine is ready for functioning green
signal light and green led (Fig.C-9) 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 DA TA for proper relation of intermittence
on/stand by to be adopted according to selected range.
(period = 10 min.).
Tab.2 shows the cutting rate as a function of thickness for
materials in aluminium, iron and steel at a maximum current
of 40A.
3. PRESSURE REGULATOR (PLASMA COMPRESSED
AIR). (Fig.C-3)
Use the knob (turn and twist to release) to adjust pressure
untill you come to the value shown on TORCH TECHNICAL
DATA. Push knob to lock the adjustment.
4. GAUGE (Fig.C-4)
Read requested value (bar) on gauge.
5. ENERGIZED TORCH (YELLOW SIGNAL LIGHT).
(Fig.C-5)
- 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 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 CUTOUT AND ABNORMAL VOL TAGE
( YELLOW LED for general warning)
- When lit, it signals overheating of some component in the
power circuit, or abnormal input voltage of the power
supply (undervoltage or voltage surge)
- During this phase machine operation is disabled.
- Reset is automatic (the YELLOW led goes off) 4 sec after
the abnormal value (as described above) returns within
an open space of at least 500
AND SAFETY
(Fig.C-6)
the permitted limits.
7. RATING PLATE (Fig. I)
a Utilisation data (cutting circuit).
1- No load voltage (U ).
2- Cutting current-voltage (I /U )
3- Duty cycle (X) in use.
b Main power supply data.
4- Number of phases and mains frequency 50/60 Hz.
5- Mains voltage (U ).
6- Maximum RMS current absorbed I1max and nominal
RMS current absorbed I .
c General information
7- Level of protection for sheathing
8- Symbol for apparatus suitable for environments with
increased risk of electric shock
9- Symbol for type of process
10- Energy conversion chart
11- Standards of reference
12- Apparatus identification
13- Name of manufacturer
14- Range of cutting current (min/max) and corresponding
conventional arc voltage.
15- Manufacturer's serial number
16- Value of delayed action fuses to be used to protect the
power line.
17- Symbols referring to safety standards
8. AIR PRESSURE FAULT (YELLOW SIGNAL LED AND
RED SIGNAL LED - GENERAL ALARM"ON"
AT THE SAME TIME ) (Fig.C-7)
- 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 turn off) after pressure
has lowered within required limits.
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 500 ms.
CUTTING OPERATIONS
PRELIMINARIES.
- Check and follow instructions as foreseen in the
paragraphs 1 SAFETY and 2 INSTALLATION of the
present instruction manual.
- WARNING !
Before starting with cutting operations verify that the parts
are properly assembled by inspecting the head of the
torch as shown on paragraph "TORCH MAINTENANCE".
- 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 to be 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 THE TORCH it is necessary to work with the
NOZZLE IN CONTACT.
WARNING!
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