13
The workpiece is not cut fully. This may be caused by:
The cutting current is too low.
The cutting speed is too high.
The electrode and nozzle of the torch are burned.
The workpiece is too thick.
Molten slag drops from the bottom of workpiece. This may be caused by:
The cutting speed is too low.
The electrode and nozzle of the torch are burned.
The cutting current is too high.
3.6 Cutting parameters table
Select proper current according to the cutting parameters table, workpiece material, cutting
thickness and cutting speed, etc.
(
The figure in the below table is an approximation.
)
Table 3-1: Cutting speed
(
in
)
when cutting current is 40A
m/m
9
8
7
6
5
4
3
2
1
0.1
0.4
0.4
0.4
1.5
1.5
1.5
1.5
8
8
8
8
0.75
0.75
Cutting thickness
(
mm
)
Mild steel
Galvanized steel
Stainless steel
Aluminum
Brass
Red copper
0.12
0.15
0.15
0.15
25
20
15
10
5
0.1
0.1
0.1
0.1
0.3
0.3
0.3
0.2
0.5
0.5
0.5
0.3
1.9
1.9
1.9
0.8
0.5
0.5
Cutting thickness
(
mm
)
Mild steel
Galvanized steel
Stainless steel
Aluminum
Brass
Red copper
Table 3-2: Cutting speed
(
in
)
when cutting current is 60A
m/m
