Telwin SPL 60/3 Manual De Instrucciones página 20

- SPL 150/3
Figure (L) machine dimensions drawing on
3 PRESSURE REGULATOR (PLASMA 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 (RED 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 activated torch button, under following
conditions:
. During PREGAS (2s) and POSTGAS (over 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 THERMIC SECURITY (YELLOW SIGNAL LIGHT)
- When lit it shows overheating of the power transformer.
- During this phase the functioning of the machine is
inhibited.
- Restoration is automatic (the lamp turns off) after the
temperature has lowered within required limits.
7 AIR PRESSURE SECURITY (YELLOW SIGNAL LIGHT)
- 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 lamp turns off) after
pressure has lowered within required limits.
8 TORCH DAMAGE (RED SIGNAL LIGHT)
- When lit it indicates that the torch is damaged, usually a
short circuit between electrode and nozzle.
- In this phase, functioning of the machine is inhibited.
TORCH
- The torch button is the only part of control 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-
gas).
- Accidental manoeuvres: in order to start, cycle button
must be pushed at least 300 ms.
- Electric safety: functioning of button is inhibited if
insulating nozzle holder is NOT set on torch head, or if it
has been unproperly set.
5. CUTTING OPERATIONS
PRELIMINARIES.
- Verify and operate conditions described on paragraph (1)
SAFETY and (3) INSTALLA TION contained in present
instructions.
- Close (bring to position 1) automatic line switch and
general machine switch in sequence.
- Choose, by working on range selector, the most suitable
position to the work that has to be performed.
- Push and release torch button (0,5 seconds) causing air
outflow (more or less 30 seconds-post gas).
- 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 CONTACT NOZZLE:
TORCH HP 50
with CURRENT SOURCE SPL 60/3 - RANGE 1.
. WITH DISTANCE NOZZLE:
TORCH HP 50 (SPACER INCLUDED)
with CURRENT SOURCE SPL 60/3 - RANGE 2.
TORCH HP 150 (SPACER INCLUDED)
with CURRENT SOURCE SPL 90/3 - RANGE 1-2.
with CURRENT SOURCE SPL 150/3 - RANGE 1-2-3.
WARNING !
contact cutting performed when not necessary may cause
the torch nozzle to wear fast.
- Bring torch nozzle near the edge of the part (3 mm.) push
torch button; after about 2 seconds (pregas) the pilot arc
ignites (max 2 seconds). If distance is right the pilot arc
moves immediately to the part generating the cutting arc.
- Draw torch above surface of the part along the ideal
cutting line, moving smoothly forward.
Adjust cutting speed according to thickness and selected
range, verifying that the arc jutting out of inferior surface
has a 5-10 degree tilting to the opposite side of direction.
Figure (M) the drawing shows torch position on part
moving forward. Arc tilting
- An excessive distance torch-part or the absence of
material (end cut) causes the immediate interruption of
the arc.
- Interruption of arc (cutting or pilot) is obtained by releasing
torch button.
- Piercing: If you have to make this operation or you have to
start from the center of the part, ignite keeping the torch
tilted and bring it to an upright position with a smooth
movement.
This procedure avoids that returns of arc or melted parts
spoil the hole of the nozzle reducing its functionality.
Figure (N) the drawing shows the starting with
- Piercing of parts with a thickness of at least 25 % of
usuable range may be carried out directly.
- For peculiar uses (ex. cutting pierced sheets or
mechanized torch cutting) contact our POST SALE
service and you will receive detailedinstructions.
COMMONEST CUTTING FAULTS
During cutting operations performance faults may arise
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slanted torch