GAR CUT (V. PROFESSIONAL). Instructions Manual.
20
SYMPTOM. ANOMALY.
PROBABLE CAUSE.
POSSIBLE SOLUTION.
Although the high frequency generating plate
is excited the arc does not ignite.
Replace high frequency generating plate.
ALTHOUGH PILOT LIGHT L1 IS
ON AND AIR FLOWS, THERE IS
NO KIND OF REACTION OF
THE PILOT ARC WHEN PRESSED
There is not a correct no-load voltage of 283
V.
Check rectifier, contactor, main transformer and
switches.
Switch l2 is selected in minimum position.
Place l2 at point 2.
The part is very thick.
The cutting speed acquired is very high.
Decrease cutting speed.
Consumable elements worn.
Replace electrode and/or nozzle.
Low voltage in the installation.
Check with electricity company.
Bad contact of the electric earth.
Make good contact of earth.
THERE IS NO PENETRATION IN
THE CUT.
Air flow incorrect.
Observe if the pressure with the air flowing is 5.5
bar. Blow the inside of the cutting torch. Clean the
electrovalves.
There is an impurity in one of the electrovalves
which prevents the piston closing the air flow.
Dismantle and clean the electrovalve.
THE AIR FLOWS ALL THE TIME.
THERE IS NO PNEUMATIC
DISCONNECTION.
Electronic control plate SCP-1 is faulty.
Replace electronic plate SCP-1.
Low air flow.
Increase the pressure. Check there is no brake in the
torch or the electrovalves where the air comes out.
THERE IS PREMATURE WEAR OF
THE CONSUMABLE ELEMENTS.
There is not sufficient preflow of air.
Adjust the electronic plate SCP-1 suitably. Increase
Tprf.
SPECIALIZED PERSONNEL MUST CARRY OUT ANY WORK ON THE EQUIPMENT.
BOTH AT THE BEGINNING AND END OF A REPAIR CHECK THE EQUIPMENT
INSULATION LEVELS. DISCONNECT THE ELECTRONIC BOARDS WHEN MEASURING
THE INSULATION.
The insulation-measuring device will have 500 V DC and will be applied to the following points of the circuit:
- Intake rectifier-Earth: Ra> 50 Mohms
- Outlet rectifier-Earth: Ra> 50 Mohms
- Switch l1 - Outlet rectifier: Ra> 50 Mohms
- Control circuit-Earth: Ra> 50 Mohms
In the event that lack of insulation is observed it is likely that this is due to the accumulation of metal dust on
the inside of the equipment.
BOTH AT THE BEGINNING AND END OF A REPAIR, BLOW THE INSIDE OF THE
EQUIPMENT WITH COMPRESSED AIR.
