Cutting Torch - Forch AC 71 Manual Del Usuario

F. Green LED
Stand-by mode
G. Yellow LED
Overheating protection
H. Red LED
Cutting arc on
CUTTING PROCESS MEASURES
WARNING!
Switch off the machine before carrying out any maintenance work on the device or the
cutting torch, for example replacing wear parts or the earth cable! Follow the instructions as
described in the Section "Safety and general warnings" in these operating instructions.

CUTTING TORCH

Every time before commissioning, ensure that the cutting torch has been installed correctly!
Install the electrode, cutting nozzle, and protective shield appropriate for the application
as described in the Section "Torch wear parts".
EARTH CABLE
Make sure that the earth cable is properly connected to the workpiece. The surface must
■
be free of oil, paint, and dust. Make sure that a good electrical contact has been made,
especially if you are cutting insulated or oxidised panels.
GAS CLEANING
Press the torch button or button (B) to start the gas cleaning and to remove the steam
■
which has collected in the torch or the supply line.
AIR PRESSURE CONTROL
Keep button (B) for steam release pressed and control the air pressure with the air pres-
■
sure controller (5). The display shows the value set for the air pressure in bar.
CUTTING CURRENT CONTROL
Control the cutting current using the potentiometer (2).
■
WARNING!
Do not start the pilot arc while selecting the current.
■
THE PLASMA ARC
Plasma is a gas that is heated to an extremely high temperature and is ionised so that it
■
conducts a current.
During the cutting process, the plasma is used to conduct the arc to the workpiece which is
■
then melted by the heat and cut off.
The cutting torch requires compressed air. This is required both for the cutting process and
■
also for cooling the cutting torch and its wear parts.