Plasma 70 S
Operating Manual
Page 7
1
Master switch
Position "O": unit is switched off.
Position "I": unit is switched on.
Attention!
The fan is controlled via the temperature of the current source.
At the instant of starting the cutting unit in a cold state, the fan is not
set to work. Only in the course of the cutting process when the current
source warms up, a thermostat activates the fan and, after cooling
down, switches it off again.
2
Fuse F1 for control transformer, 2 A slow
3
Control lamp ‘mains’
is lit when unit is switched on.
4
Rotary type control knob for infinitely variable regulation of cutting current
Regulates the cutting current between 20 A and 70 A. The display also shows the
appropriate cutting nozzle diameter.
5
Compressed-air test key
At pressed key, the compressed air is in full flow. This allows regulation of the
working pressure while air is flowing.
6
Compressed-air gauge
indicates the working pressure of compressed air downstream the filter pressure
reducer.
If, despite the availability of adequate supply pressure, the specified working
pressure cannot be reached, heavily clogged filters may be the cause. In this case,
the filter cartridges have to be changed.
7
Compressed-air fault indicator
lights up if there is insufficient supply of compressed air or if the working pressure
has been set too low. No starting of the arc via torch trigger possible. After
elimination of the deficiency, the plant will be operable again.
8
Temperature fault indicator
lights up if the current source is overheated. No starting of the arc via torch trigger
possible. With the fan running, the unit will be operable again after approx. 5 min.
9
Torch fault indicator
lights up in case of defects occurring on the torch. No starting of the arc via torch
trigger possible. The unit will not be operable again until the following steps
have been taken: switch off mains (1), eliminate cause of deficiency, restore power.
10
Workpiece connecting socket
11
Central connecting socket
for plasma torch
