Plasma 70 S
Operating Manual
Page 9
7. Preparations for cutting
7.1 Regulation of cutting current
Set the cutting current dependant to the material and thickness of the workpiece.
In manual cutting operations, the current setting should be high enough to enable continu-
ous manipulation of the cutting torch.
7.2 Torch equipment
Select the correct plasma nozzle according to the table below. If the torch is fitted with an
oversized plasma nozzle, the performance and cutting quality will be impaired. An under-
sized tip bore will overload and destroy the plasma nozzle.
cutting current
20 - 60 A
50 - 70 A
plasma nozzle
1,0 - 1,2
1,2 - 1,4
When replacing a worn part, check for tight fit.
The plasma nozzle and the electrode are wearing parts. A plasma nozzle with a
gravely burnt bore and an electrode exhibiting a deep penetration crater will
degrade the ignition characteristics and thus the cutting quality.
The parts need to be exchanged.
7.3 Regulation of compressed air
Set master switch to „I“; control lamp ‘mains’ is lit.
Unlock the pressure reducer by pulling the control knob upwards. Set the working pres-
sure according to the torch manufacturer’s specification. The working pressure must be
regulated at flowing air (press compressed-air test key).
