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5. CONTROL INSTRUCTIONS
WARNING! Before operating the machine ensure that you read, understand and apply Section 2 safety instructions. Ensure that the
machine is disconnected from the power supply before moving or changing accessories.
5.1.
Locating the inverter
5.1.1.
Ensure that the work area has a good airflow and that there is no dust, smoke or gas present.
5.1.2.
Ensure that there is a minimum clearance of 500mm around the machine, and that there are no obstacles to prevent a cool airflow.
Also check to ensure that the front outlet and rear grilles are not blocked.
5.1.3.
When moving the machine, disconnect from the mains power supply and air supply (PP25 only) and gather all cables safely.
5.2.
Connecting the earth cable
Connect the work clamp to the workpiece or to the metal workbench as follows:
5.2.1.
Check that there is a good electrical contact. Caution: Ensure that you have made good contact on oxidised or coated sheets.
5.2.2.
Make the earth connection as close to the cutting area as possible.
5.2.3.
DO NOT connect to structures or objects, other than the metal workbench which is supporting the workpiece. To do so may 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.
5.3.
ON/OFF switch
The on/off switch is located at the rear of the machine (figs. 2.1 & 3.1). When
the switch is in the "O" position the machine is turned off. When switched
to the "I" position the machine is turned on and the switch will illuminate.
A green LED will also show on the front panel (fig. 2.7 & fig. 3.6)
indicating that mains power is present and the machine is in the 'ready'
condition. The control and duty circuits are now live but the torch will
remain in 'stand-by' mode until the torch button is pressed.
5.4.
Cutting regulator
The cutting current is regulated by the knob/potentiometer on the
front panel (fig. 2.2 & 3.2).
5.5.
Air pressure - PP25 only
5.5.1.
Unlock the pressure regulator knob (fig. 2.3) by pulling it upwards. Adjust
the regulator to give the required air pressure (see 6.1.5 & 6.16). Always
adjust up to the required pressure.
5.5.2.
Push the pressure regulator knob downwards to lock it.
5.6.
Torch control
When the machine is turned on the green indicator light (fig. 2.7 & fig.
3.6) will show that the torch is in "Stand-By" mode.
5.6.1.
When the torch button is pressed the machine is activated and a yellow
LED will illuminate (fig. 2.5 & fig. 3.3) indicating the presence of the pilot
arc. 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.
5.7.
Thermal switch and mains voltage fault
If the yellow LED (fig. 2.6 & fig.3.4) 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 within a few seconds the switch will re-set and the LED will go out. The machine is then ready for use again.
5.8.
Compressor thermal fault - PP25PLUS only
When the red LED (fig.3.5) on the front panel illuminates it indicates that the compressor drive motor has overheated. Reset is
automatic after the motor has cooled.
5.9.
Torch
Although the machine and torch may be fully powered, the torch button is the only way to activate the cutting process.
5.9.1.
To turn the cutting process on, the torch button must be fully depressed
5.9.2.
Release the button and the cutting cycle will stop immediately. The cooling air (post-air) will continue to flow for a further 30 seconds.
Note:
To minimise the possibility of accidental starting, the button must be pressed for at least 500 milliseconds before the cutting operation
will start.
Original Language Version
fig. 2
PP25
fig. 3
PP25PLUS
PP25.V2, PP25PLUS.V2
Issue: 6 - 17/01/10
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