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ALFA IN a.s ©
www.alfain.eu
8. CUTTING
1. Move the torch to the material and press the torch trigger. The arc will
ignite.
2. Start with cutting. After end of cutting release the torch trigger, the arc turns
off and for 30 seconds the air will flow to cool down the torch.
3. After end of pre-gas procedure/torch cooling, which lasts 30 seconds, you
can turn off the machine.
4. Move the torch with a constant speed. Cutting speeds vary according to
torch output amperage, the type of material being cut, and operator skill.
5. Output current setting or cutting speeds may be reduced to allow slower
cutting when following a line, or using a template or cutting guide while still
producing cuts of excellent quality.
6. To achieve a good cutting quality make sure the distance between the tip
and the material is max. 2 mm. At a greater distance decreases cutting
power and the arc may go off. The nozzle can be pulled directly on the
material.
7. Plasma cutting may be done in all possible positions (vertically,
horizontally, overhead, vertical ascending and descending), but as far as
possible choose primarily horizontal cut. In other positions the operator is
increasingly threatened by flying drops of molten material.
8. We recommend starting cutting at the edge of the material. If needed to
start from the centre of the material, or to cut hole into the material, slightly
tilt the torch head and gradually it straighten into a vertical position so the
spraying material would not damage the cutting tip (see Figure 4). This
workflow must always be followed, if the thickness of material is above 3
mm.
9. In case of cutting in the corner or around the corner (see Figure 5), use the
long electrode and cutting tip. The cutting power while using the Long
cutting tip is decreased.
Fig. 4
Fig. 5
