GB
17
3. Clamp the earthing terminal
4
onto the workpiece to be cut and make sure that there is a good
electrical contact.
4. Press the on/off switch
16
.
5. Set the cutting current on the current controller
14
. If the arc beam is interrupted the cutting current
must be set higher if necessary. If the electrode burns through frequently, then the cutting current
must be set lower.
6. Position the plasma cutter
8
on the workpiece so that the burner sleeve
8c
is free and that a
blowback of the molten metal is not possible. Push the interlocking switch
8f
forwards to lock the
plasma burner button
8a
in place. Press the plasma burner button
8a
. The transmitted cutting arc is
ignited on the edge of the sheet in this manner.
7. Start cutting slowly and then increase the speed in order to achieve the desired cutting quality.
8. The speed must be regulated so that a good cutting capacity can be achieved.
9. When the cutting work is complete push the interlocking switch
8f
backwards again.
PLEASE NOTE:
To cut in manual cutting mode, pull the overlying burner across the workpiece
while maintaining a constant speed. To achieve the perfect cut, it is important for the material thickness
to comply with the correct cutting speed. If the cutting speed is too low, the cutting edge will be blunt
due to the severe heat input. The optimal cutting speed is achieved once the cutting jet is slightly inclined
towards the rear while cutting. If the plasma burner button is released
8a
, the plasma jet goes out and
the power supply switches off. The gas continues to flow for approx. 5 seconds in order to cool the
burner. During the gas post-flow time, the plasma cutter
1
must not be switched off to avoid damaging
the plasma burner
8
as a result of overheating.
ATTENTION:
The device must be left on for approx. 2–3 minutes once the cutting work has been
completed. The cooler cools the electronics.
z
Overheating protection and HRD display
If the device overheats, the overheating protection and HRD display
9
lights up yellow.
The output voltage will be lowered to zero.
After the device has cooled down (approx. 10 minutes) you can resume work.
If you press the burner button and the electrical contact is not good, the hazard reduction device (HRD)
will inhibit the voltage output. The overheating protection and HRD display
9
lights up blue.
z
Types of plasma cutting
Drag cutting
Hold the tip of the burner sleeve
8c
low over the workpiece and press the plasma burner button
8a
.
Now move the burner sleeve until
8c
there is contact with the workpiece and the cutting arc is fixed.
Once the cutting arc has been generated, move the plasma burner
8
in the desired direction.
Makes sure that burner sleeve is slightly
8c
angled and that contact with the workpiece is maintained.
This working method is called drag cutting. Avoid quick movements. A sign of quick movements is
sparks that fall off the top of the workpiece. Move the plasma burner
8
at a speed in which the spark
accumulation is concentrated on the bottom side of the workpiece. Ensure the material is completely
separated prior to continuing with this process. Set the necessary drag speed.
Distance cutting
In some case, it is beneficial cut while holding the burner sleeve
8c
at a height of 1.5 mm to 3 mm
above the workpiece. This reduces the quantity of material that is blown back into the tip. This makes it
possible to penetrate thicker material thicknesses. Distance cutting should be used if penetration or
furrow work is carried out. Furthermore, the “distance” working technique can be used when you need
to cut sheet metal to minimise the risk of material splashing back which could damage the tip.
