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4.3.3.
When moving the machine, disconnect from the mains power supply and gather all cables safely.
4.4.
connecting the "+"ve return cable
4.4.1.
check that there is a good electrical contact. caution: ensure that you have made good contact on oxidised or coated sheets.
4.4.2.
make the earth connection as close to the cutting area as possible.
DO nOt connect to structures or objects, other than the metal work bench which is supporting the workpiece. to do so may
8
damage the safety system and will give a poor cut.
DO nOt make the earth connection to the part of the workpiece that will be removed.
8
4.5.
isolation switch
4.5.1.
the i/o (on/off) switch is located at the rear of the machine (fig.2) . A green led will illuminate on the front panel (fig.1) indicating that
mains power is present. The control and duty circuits are now live but the torch will remain in 'stand-by' mode until the air supply is
connected and the torch button is pressed.
4.6.
cutting regulator
4.6.1.
the cutting current is regulated by the knob/potentiometer on the front panel (fig.1).
4.7.
torch control
4.7.1.
When the machine is turned on, the green indicator light (fig.1) will show that the torch is in "Stand-By" mode
4.7.2.
When the torch button is pressed the machine is activated as a safety feature, should the following situations arise, the torch will
automatically de-activate:
a) During Post-Air (>30sec) phase.
b) if the pilot arc is not moved to the workpiece within 2 seconds.
c) if the cutting arc is interrupted because the torch is held too far from the workpiece, or if the electrode is worn out, or if the torch
has been forced away from the workpiece.
d) if the warning led illuminates indicating either mains voltage fluctuation or overheating.
4.8.
thermal switch and mains voltage fault
4.8.1.
if the yellow led (fig.1) on the front panel illuminates this indicates a mains voltage or thermal problem and the machine will be
automatically shut down as a result of one of the following:
a) the power transformer has overheated.
b) there has been a decrease or increase in the mains voltage supplied to the machine.
When the safety switch is activated in this way the problem is normally self-rectifying, and dependant upon duty cycle time, see
rating plate in section 9. The switch will re-set and the LED will go out and the machine is then ready for use again.
4.9.
torch
4.9.1.
Although the machine and torch may be fully powered, the torch button is the only way to activate the cutting process.
4.9.2.
to turn the cutting process on, the torch button must be fully depressed.
4.9.3.
Release the button and the cutting cycle will stop immediately. The cooling air (post-air) will continue to flow for a further 30 seconds.
4.9.4.
note: to minimise the possibility of accidental starting, the button must be pressed for at least 1/5 of a second before the cutting
operation will start.
regulator
Handle
Power on
green led
Pressure
gauge
Warning
temperature
amber led
connection
to torch
Pilot arc
connection
© Jack sealey limited
fig.1
Work piece
3 pin connection
connection
Original Language Version
Air supply
current
adjust
fig.2
i/o switch
Power cable
PP40H.V2 | issue2(sP) 03/02/17
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