Raider RD-PCM29 User Manual page 22

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Press the on / off switch.
Connect the ground terminal to the cut part and make sure there is a good electrical outlet.
Adjust the cutting current with the current regulator. Move the plasma torch closer to the part so
that the nozzle is free and there is no repulsion of molten metal particles. Press the plasma torch
button. This ignites the transferred cutting arc at the end of the blade. Start cutting slowly and then
increase the speed to achieve the desired cutting quality. Adjust the speed so that you get a good
cutting result. Plasma air generates a straight arc (stainless steel, aluminum) or a 5-degree arc (mild
steel). When cutting, make sure that the nozzle is in constant contact with the workpiece. To get an
optimal cut, it is important to adjust the cutting speed to the thickness of the material. At too low a
cutting speed, the cut is not smooth due to the strong heat. The optimum cutting speed is achieved
when the cutting beam tilts back slightly during cutting. When the plasma torch button 8a is released,
the plasma beam goes out and the power source is switched off. The gas continues to flow for another
5 seconds to cool the plasma burner.
The same process takes place when separating from the part with the plasma torch button
pressed. During residual gas evolution, the plasma cutting apparatus 1 must not be switched off in
order to avoid damage due to overheating of the plasma torch.
ATTENTION! After cutting, leave the appliance on for another 2-3 minutes! The fan cools the
electronics.
8. • Types of plasma cutting
Sliding cutting
Hold the blade of the pistol low next to the workpiece and press
gun switch. Now move the blade of the gun until it touches the workpiece, the cutting arc is fixed.
Once the cutting arc is generated, move the gun in the desired direction. In doing so, make sure that
the blade of the pistol is slightly inclined and in constant contact with the workpiece. This method of
operation is called sliding cutting. Avoid sudden movements. A sign of this are the sparks that fly out
from the upper side of the processed object. Move the gun at such a speed that the accumulation
of sparks is concentrated on the underside of the workpiece. Make sure the material is completely
separated before proceeding. Adjust the slip speed as needed.
Remote cutting
In some cases, it is preferable to cut, keeping the gun blade about 1.5 mm to 3 mm above
the workpiece. This reduces the amount of material that is blown back into the blade. This allows
penetration through thicker materials. Remote cutting should be used when penetrating or furrowing.
You can use the "distance" cutting technique when cutting sheet metal to minimize the risk of back-
spraying material that could damage the blade.
Drilling
For drilling, place the blade about 3.2 mm above the workpiece. Hold the pistol at a slight angle
to direct the sparks away from you and the blade of the pistol. Press the plasma torch button and tilt
the gun blade until it appears
the main cutting arc and begin to form sparks. Try drilling an object that you no longer need,
and only when it is obtained without problems, start drilling along the predetermined line for cutting
your part. Check the gun for wear defects, cracks, or exposed cable sections. Replace or repair it
before using the appliance. Excessively worn blade / nozzle of the pistol leads to speed deceleration,
voltage drop and uneven cutting. A sign of an excessively worn pistol blade / nozzle is an elongated
or enlarged nozzle bore. The outer end of the electrode must not be deeper than 3.2 mm. Replace it
when it is more worn than indicated above. When the protective cap is more difficult to install, check
the thread.
9. Troubleshooting