V1.0 PROCUT 30A Digi Plus Plasma Cutter 9085754
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AIR PLASMA CUTTING TECHNOLOGY
A plasma cutter operates by passing an electric arc
from an electrode (Fig. 3-5) through a gas such as
nitrogen, air, argon or oxygen that is forced
through the air diffuser (Fig. 3-4) then a
constricted nozzle (Fig. 3-2). The shield cup
contains and directs the initial air/gas (Fig. 3-6).
The gas temperature is raised until it becomes
superheated plasma (Fig. 3-3). The plasma cuts
through the metal while carrying the electrical charge. The charge transfers to
the metal and ground cable, completing the electrical circuit.
The electrode has an insert of tough high conductive material such as
hafnium and cerium (Fig. 3-1). The nozzle and electrode require periodic
replacement due to erosion with use. Clean, dry air improves the lifespan of
the electrodes and nozzle. A plasma air filter is recommended.
OVER-VOLTAGE
This equipment has an automatic voltage compensation function, which
enables the unit to maintain the voltage within the given range. In case
that the input voltage or amperage exceeds the stipulated value, it is
possible to damage the equipment’s components. Please ensure your
primary power supply is correct (See Specifications).
DUTY CYCLE
The cutting unit’s duty cycle rating defines how long the operator can cut
before allowing the cutting unit to cool. The duty cycle is a percentage of a 10-
minute period. The cutting unit must cool for the remainder of the cycle.
If a cutting unit has a duty cycle rating of 60% at the rated output (see
Specifications), this means that the user can cut for 6 minutes and then rest
the welding unit for 4 minutes before using it again.
THERMAL PROTECTION
Constantly exceeding the duty cycle can damage the cutting unit. An internal
thermal protector will open when the duty cycle is exceeded, shutting OFF all
cutting unit functions except the cooling fan. Leave the cutting unit turned ON
with the fan running. The thermal protector will automatically reset and the
cutting unit will function normally again once it has cooled.
Wait at least another 10 minutes after the thermal protector opens before
resuming cutting. Starting before this additional time may result in a shortened
duty cycle.
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