Loading Limits Dependent On The Plasma Gas Flow Rate; General - Fronius Robacta PTW 500 Operating Instructions Manual

Loading limits dependent on the plasma gas flow
rate

General

Loading limits for plasma welding/plasma brazing depend on the following fac-
tors:
-
-
-
The following loading limits apply to the standard tungsten electrode setting (see
also „Adjusting the tungsten electrode").
Loading limits For plasma welding, the values for the plasma gas flow rate and maximum wel-
dependent on ding current must lie within the set limits. An upper or lower exceed of these li-
the plasma gas
mits can change the plasma properties, e.g.:
flow rate
-
-
IMPORTANT! Do not exceed the upper or lower limits set for plasma gas values
and max. welding current during operation.
IMPORTANT! The minimum coolant flow rate is 1 l/min
This table is only valid for the PTW 500 (electrode diameter 1.0 mm; d.c. 60%):
ø Plasma nozzle
0.6 mm
0.8 mm
1 mm
1.2 mm
1.4 mm
1.6 mm
1.8 mm
This table is only valid for the PTW 1500:
ø Plasma nozzle
1.5 mm
2.0 mm
2.5 mm
3.0 mm
Diameter of the plasma nozzle
Position of the tungsten electrode
Plasma gas flow rate
Low plasma gas flow rate -> „soft" plasma jet
High plasma gas flow rate -> „hard" plasma jet („plasma cutting")
Plasma gas flow rate
Min. 0.30 l/min
Min. 0.30 l/min
Min. 0.30 l/min
Min. 0.30 l/min
Min. 0.30 l/min
Min. 0.30 l/min
Min. 0.30 l/min
Plasma gas flow rate
Min. 0.30 l/min
Max. 0.80 l/min
Min. 0.35 l/min
Max. 1.00 l/min
Min. 0.45 l/min
Max. 1.20 l/min
Min. 0.55 l/min
Max. 1.30 l/min
Max. welding current
15 A
20 A
28 A
35 A
45 A
50 A
50 A
Max. welding current
60 A
100 A
80 A
120 A
110 A
145 A
130 A
150 A
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