s
DANGER!
Ensure cutter is disconnected from power supply before performing service or maintenance on any part of the unit, cables or torch.
7.1.
Power unit
Service and maintenance of the cutter must only be undertaken by an authorised service agent.
7.1.1. Keep the cutter clean by wiping with a soft cloth. Do not use abrasives.
7.1.2. Periodically check to ensure the carrying strap is in good order and condition. If not replace it immediately.
7.1.3. Ensure that the front and rear air vents are not blocked.
7.2.
Cables
7.2.1. Check to ensure cables are in good order and condition. If damaged replace immediately.
7.2.2. Keep cables clean. Do not use solvents.
7. MAINTENANCE
p
WARNING!
Before operating the cutter ensure that you read, understand and apply Section 1 safety instructions and that you have familiarised
yourself with the controls. Ensure that the cutter is disconnected from the power supply before moving or before changing accessories.
6.1.
Set up
6.1.1. Ensure that the compressed air is correctly connected to the cutter (see Section 4).
6.1.2. Check that the earth cable is correctly clamped to the workpiece (see para. 5.2).
6.1.3. Switch on the mains power supply and the cutter On/Off switch (switch to the I position).
6.1.4. Set the current regulator control (fig. 2) to suit the cut.
6.1.5. Check, and adjust if necessary, the air pressure (as para. 5.6). Allow the air flow to continue until any
condensation has been removed from the torch.
6.2.
Cutting workpiece from the edge
6.2.1. Bring the torch nozzle toward the edge of the workpiece and hold it at 3mm above the cutting line.
6.2.2. Press the torch button. Pre-air will ignite the pilot arc (after about 2 seconds) and, if the distance between
the torch nozzle and the workpiece is correct, the arc will jump to the cutting line. Move the nozzle
down
onto
the workpiece and commence the cutting process.
6.2.3. Move the torch slowly and smoothly forward along the cutting line in contact with the workpiece.
6.2.4. Adjust cutting speed according to the thickness of the material to be cut and the selected current.
6.2.5. Check the underside of material being cut. The arc (flame) should be at 5 - 10
O
from the vertical (fig. 3), opposite to the direction of cutting.
6.3.
Cutting workpiece by piercing
6.3.1. Place torch nozzle at an angle to the workpiece at the position you wish to commence cutting (fig. 4).
6.3.2. Ignite the torch arc, then slowly and smoothly bring the arc to the upright position. the arc
will pierce the workpiece and cutting can proceed.
6.4.
To stop the arc
6.4.1. Release torch button to stop the arc. The post-air will continue to flow, cooling the nozzle.
6.4.2. Causes of unintentional arc failure are:
a) The distance between the torch nozzle and workpiece is too great.
b) The cut is complete and the nozzle has continued beyond the edge of the workpiece.
c) The off-cut falls away, increasing the nozzle gap.
6.5.
Pilot arc settings
s
DANGER!
Ensure the cutter is disconnected from power supply before removing casing.
6.5.1. Remove inverter end covers and then main casing.
6.5.2. Locate the two blocks of miniswitches on the upper PCB behind the front control panel.
6.5.3. The first four miniswitches in the block of eight control the pilot arc current and the arc duration (time to cut-off if cutting arc is not
established) as follows:
Switch
Switch
1
2
Current
3
4
Time
Off
Off
12A
Off
Off
0.5sec.
On
Off
14A (factory setting)
On
Off
1.0sec.
Off
On
16A
Off
On
2.0sec. (factory setting)
On
On
18A
On
On
3.0sec.
In the block of two miniswitches, the miniswitch S2-1 controls grid mode - S2-1 On = grid mode Off
S2-1 Off = grid mode On
Grid mode allows automatic re-striking of the pilot arc within two seconds of an interruption of the cutting arc.
6. OPERATING INSTRUCTIONS
fig. 3
fig. 4
PP30 - 1 - 130901
9 - Mains Supply
U
1
: Rated supply voltage and frequency.
: Delayed fuse(s) for supply protection.
I
1
: Supply current at corresponding cutting outputs.
S
1
: Apparent supply power at corresponding cutting outputs.
cos
j:
Power factor - actual supply power (P
1
) = cos
j
x S
1
kVA.
10 - Output
U
0
: Maximum open-circuit voltage.
I
2
, U
2
: Corresponding cutting current and voltage.
X: Cutting ratio based on a 10 minute cycle. 30% indicates
3 minutes cutting and 7 minutes rest, 100% indicates
continuous cutting.
11 -Serial Number. Specifically identifies each plasma cutter.
