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MAINTAIN THE STATE AND EFFICIENCY
OF THE AIR DIFFUSER, NOZZLE-HOLDER AND
SWIRL-RING.
The air outlet holes of these components
must be free from occlusions. Faulty air diffusion
causes the torch to heat up too much, with the
subsequent deterioration of the torch head.
KEEP
THE
OCCLUSIONS AND SLAG.
Clean the nozzle from time to time.
there is slag on the surface base there could be arc
ignition problems. Use a cleaning brush, never
sharp elements, as the nozzle hole could be
deformed.
CHAPTER 5.
ANOMALIES. PROBABLE CAUSES. POSSIBLE SOLUTIONS.
SYMPTOM. ANOMALY.
GENERAL PROBLEM.
NOTHING WORKS
.
LIMITER TRIPS
ALTHOUGH THE MACHINE IS
CONNECTED AND WITH LIGHT
C ON, THERE IS NO REACTION
WHEN PRESSED
WHEN PRESSED, EVEN
THOUGH AIR COMES OUT, THE
ARC DOES NOT IGNITE OR THE
ARC "BACKFIRES".
GAR CUT (V. INDUSTRIAL). Instructions Manual.
NOZZLE
CLEAN
OF
If
PROBABLE CAUSE.
The machine has no voltage in one or all its
vital elements.
Magnetothermal switch has low gauge for the
case (if it is the main one the installation may
have an installed power of under 25 kw
minimum). There may be a short circuit, which
is what causes the limiter to trip.
Low air pressure. Machine not operative. Red
light on.
Transformer overheated. Machine not
operative.
Failure in the torch safety system. The nozzle-
holder of the pistol may not be perfectly
tightened.
Failure of the pistol switch which does not
make perfect contact.
Main electronic plate SCP-2 faulty.
Air pressure set at a high value.
New electrode with insulating surface layer.
Slag on flat part of the nozzle.
The preflow cycle is not completed as the
pushbutton is released quickly.
Excessive wear of the electrode.
Nozzle diameter very big, either due to wear
or it is a new nozzle 1.8 mm in diameter.
Low quality electrode or nozzle.
The high frequency electronic plate GHF is not
excited with 220 V in ignition phase.
The breakdown of the central control plate is
reiterative.
IMMEDIATELY CHANGE A WORN
ELECTRODE OR A NOZZLE.
We can say that there is wear:
- If the middle hole of the electrode is 2 mm.
- If the nozzle has an irregular hole or increased
diameter.
(In this case there will be no
perpendicularity in the cutting section).
DO NOT CUT WITH THE TORCH VERY
HOT.
(Wait until the air cools it totally).
BRUSH THE NEW ELECTRODES.
(Polish the electrode.)
POSSIBLE SOLUTION.
1. Make sure there is voltage at the entry to the
machine, if not the tapping must be changed. It is
advisable to see if any magnetothermal has "blown".
2. Check that fuse F1 is not open.
3. The machine panels must be removed testing the
logical points of the electrical diagram.
Change the magnetothermal for another larger
gauge one. It is important for the magnetothermal
switch to have a characteristic slow type curve. In the
event that the electrical installation has limited power
the cutting work must be tested at lower current
levels. (Pos. 1 of switch l2).
Increase the intake pressure by means of pressure
reducing valve situated on the rear of the apparatus.
Amber light on. Wait until the machine cools down.
Secure safety cap of the torch.
Screw in the nozzle-holder well.
Change torch microswitch.
Replace electronic plate SCP-2
Decrease it to a value of 5.5 bar with pressure
reducing valve R.
Brush electrode. "Polish the electrode".
Clean the nozzle properly.
Keep the pushbutton pressed for more than one
second.
Replace the electrode.
Replace nozzle.
Use original spares.
Replace
electronic
connections and wiring.
Check the degree of insulation of the equipment.
Blow the inside with compressed air.
19
control
plate.
Supervise
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