Control, Warning And Safety Devices - Prima PP 35 Manuel D'instructions

CONTROL, WARNING AND SAFETY DEVICES

POWER SOURCE
General Switch O - I (6)
In position I (ON) the machine is ready for functioning. Pilot light and led (1) indicating mains ON are lit.
Control and duty circuits are fed but there is no voltage in the torch (STAND BY).
In position O (OFF) any functioning is inhibited, control devices and warnings light are off.
Cutting Current Potentiometer (10)
It allows to set the intensity of the 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 adpted
according to the selected range. (period = 10 min.)
Pressure Regulator (Plasma Compressed Air) (9)
Use the knob (turn and twist to release) to adjust pressure untill you reach the value shown on "Torch
Technical Data". Push knob to lock the adjustment.
Air Test Trigger(5)
It allows the air leak from the torch without the presence of voltage. In this way it is possible to to set the
correct air pressure.
Gauge (11)
Read requested value (bar) on gauge
Energized Torch (2)
√ √ √ √ √
When lit it shows that cutting circuit has been activated: Pilot Arc or Cutting Arc "ON".
√ √ √ √ √
The torch is usually off (disengaged cutting circuit) with torch button not activated (stand by).
√ √ √ √ √
It is off, with torch button pressed, 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 is interrupted 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.
Thermal Cutout (3)
√ √ √ √ √
When lit , it signals overheating of some component in the power circuit.
√ √ √ √ √
During this phase machine operation is disabled.
√ √ √ √ √
Reset is automatic (the yellow led goes off) 4sec after the abnormal value (as described above)
returns within the permitted limits.
Abnormal Voltage (8)
√ √ √ √ √
When lit , it signals abnormal input voltage (overvoltage);
√ √ √ √ √
During this phase machine operation is disabled.
√ √ √ √ √
Reset is automatic (the red led goes off) 4sec after the abnormal value (as described above)
returns within the permitted limits.
Air Pressure Fault (4)
√ √ √ √ √
When lit, indicates that air pressure is not enough for proper functioning.
√ √ √ √ √
During the phase, the functioning of the machine is inhibited.
√ √ √ √ √
Restoration is automatic (the led turns off) after pressure has lowered within required limits.
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