3-4.
Notices to Cutting
- Given current :
The cutting power within the specified range of the parameter table, the
corresponding value for the work must be adjusted. The current is adjustable and the
display shows.
3-3.
Working Parameters of Cutter
Air plasma cutting specs for low-carbon steel
Plate
thickness
(mm)
Conduction
nozzle
aperture
(mm)
Cutting
current
(A)
Airflow
(l/min)
Cutting
speed
(m/min)
6
ø 1,0
30
8
0,24
10
ø 1,2
40
70
0,3
Air plasma cutting specs for stainless steel
Plate
thickness
(mm)
Conduction
nozzle
aperture
(mm)
Cutting
current
(A)
Airflow
(l/min)
Cutting
speed
(m/min)
6
ø 1
30
8
0-2,5
10
ø 1,2
40
70
0-2,5
Air plasma cutting specs for aluminium and aluminium alloy
Plate
thickness
(mm)
Conduction
nozzle
aperture
(mm)
Cutting
current
(A)
Airflow
(l/min)
Cutting
speed
(m/min)
6
ø 1,2
40
10
0-30
10
ø 1,5
100
70
0-30
• When preparing for cutting, hold the cutting gun (the cutting gun does not contact the workpiece for a
model of non-contact arc striking) and press the gun switch; at this time, plasma arc will eject from the noz-
zle hole, indicating the electrode, nozzle, etc., are installed correctly. If there is no plasma arc or only weak
plasma arc ejected from the nozzle hole, it indicates the electrode and nozzle are installed improperly, so
reinstallation is necessary after power-on.
• When cutting starts, the outer edge of the nozzle hole should be aligned to the edge of the workpiece. Press
the cutting torch switch to strike the arc; if the arc is not struck, release the switch and press it again. After
successful arc striking, move the cutting torch at a constant speed to conduct normal cutting (the moving
speed should vary from different plate thicknesses; if the sparks upturn, it indicates the moving speed is too
fast and the workpiece is not cut through, and the moving speed should be slower. If the sparks splash verti-
cally to the workpiece, it indicates the moving speed is too slow and the adhering slags may increase, and
the speed should be improved properly.
• At the end of the cutting, when the workpiece will be cut off, the cutting speed should be slowed down,
release the cutting torch switch to complete the cutting.
• Splashes adhering to the nozzle surface will affect the cooling effect of the nozzle, so they should be removed
in time, and dust and splashes on the cutting gun head should be removed regularly so as to maintain a
good heat emission effect.
• The cutting torch rack ensures the distance from the nozzle to the plate. Never remove the cutting torch rack
during cutting; otherwise the normal distance from the nozzle to the plate can not be guaranteed, thus
causing the nozzle to touch the plate so as to lead to the gun burned.
• Replace the electrode and nozzle. In case of the following cases, be sure to replace the electrode and noz-
zle in time.
1) above 1.5 mm electrode consumption depth;
2) irregularly deformed nozzle aperture;
3) obviously slower cutting speed and green flames occurring for arc
4) difficult arc striking;
5) Slanting kerf or widening kerf
EN-9
