Initial Operation - Scheppach PLC40 Original Bedienungsanleitung

m ATTENTION!
The ceramic cap (15) must only be screwed on to
the burner (13) once it has been equipped with the
electrode (18), the diffuser (17) and the nozzle (16).
If these parts are missing, the device may malfunc-
tion and it may create a hazard for the operating
personnel.
9.

Initial operation

1. Set the plasma cutter up in a dry and well venti-
lated area.
2. Position the machine in the vicinity of the work-
piece.
3. Press the on/off switch (24).
4. Clamp the ground terminal (5) to the workpiece to
be cut and make sure that there is a good electri-
cal contact.
5. Set the cutting current on the current controller
(12). If the arc beam is interrupted the cutting cur-
rent must be set higher if necessary. If the elec-
trode burns through frequently, then the cutting
current must be set lower.
6. Position the plasma cutter (13) on the workpiece
so that the sleeve (16) is free and that a blow-
back of the molten metal is not possible. Press the
plasma burner button (14). The transmitted cut-
ting arch is ignited on the edge of the sheet in this
manner.
7. Start cutting slowly and then increase the speed
to achieve the desired cutting quality.
8. The speed must be regulated so that a good cut-
ting capacity can be achieved. The plasma beam
creates a straight arch (stainless steel, aluminium)
or a 5° arch of approach (soft steel).
To cut in the manual cutting mode, pull the overlying
burner across the workpiece while maintaining a con-
stant 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 cut-
ting 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 (14) is released, the plas-
ma jet goes out and the power source switches off.
The gas continues to flow for approx. 5 seconds in or-
der to cool the burner. The same process is followed
when the workpiece is pulled out with a pressed plas-
ma burner button (14).
During the gas post-flow time, the plasma cutter must
not be switched off to avoid damaging the plasma
burner (13) 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.
Types of plasma cutting
Drag cutting
• Hold the tip of the sleeve (16) low over the workpiece
and press the plasma burner button (14).
• Now move the sleeve until (16) there is contact with
the workpiece and the cutting arch is fixed.
• Once the cutting arch has been generated, move
the plasma burner (8) in the desired direction. Make
sure that burner sleeve is slightly (16) 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 of the top of the workpiece.
• Move the plasma burner (13) at a speed in which
the spark accumulation is concentrated on the bot-
tom 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 cases, it is beneficial cut while holding the
sleeve (16) 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 strengths.
Distance cutting should be used if penetration or fur-
row 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.
Perforation
• To drill through place the tip approx. 3.2 mm above
the workpiece.
• Hold the plasma burner (13) at a slight angle to guide
the sparks away from the sleeve (16) and your body.
• Press the plasma burner button (14) and lower the
tip of the plasma burner until there is a main cutting
arch and sparks begin to form.
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