Plasma PTW 1500, Manual

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10
Loading limits
dependent on the
plasma gas flow
rate
For plasma welding, the values for the plasma gas flow rate and maximum welding current
must lie within the set limits. An upper or lower exceed of these limits can change the
plasma properties, e.g.:
-
Low plasma gas flow rate ............. „soft“ plasma jet
- High plasma gas flow rate ............ „hard“ plasma jet („plasma cutting“)
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%):
∅ ∅
∅ ∅
∅ Plasma nozzle Plasma gas flow rate Max. welding current
0.6 mm min. 0.3 l/min 15 A
0.8 mm min. 0.3 l/min 20 A
1 mm min. 0.3 l/min 28 A
1.2 mm min. 0.3 l/min 35 A
1.4 mm min. 0.3 l/min 45 A
1.6 mm min. 0.3 l/min 50 A
1.8 mm min. 0.3 l/min 50 A
This table is only valid for the PTW 1500:
∅ ∅
∅ ∅
∅ Plasma nozzle Plasma gas flow rate Max. welding current
1.5 mm min.0.30 l/min 60 A
max.0.80 l/min 100 A
2.0 mm min.0.35 l/min 80 A
max.1.00 l/min 120 A
2.5 mm min.0.45 l/min 110 A
max.1.20 l/min 145 A
3.0 mm min.0.55 l/min 130 A
max.1.30 l/min 150 A
Minimum plasma gas flow rate:
Amount of gas at which the welding arc still remains stable.
Maximum plasma gas flow rate:
Gas flow rate that makes working with the maximum welding current possible, depending
on the plasma nozzle.
Loading limits dependent on the plasma gas flow
rate
General Loading limits for plasma welding/plasma brazing depend on the following factors:
-
Diameter of the plasma nozzle
- Plasma gas flow rate
- Position of the tungsten electrode
The following loading limits apply to the standard tungsten electrode setting (see also
section entitled „Adjusting the tungsten electrode“).