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OPERATION
Torch height too high
excessive bevel; plasma
Stream may not cut all the
way through the material
Tip size and condition
The tip orifices focus the plasma stream to the work piece. II is important to use
the correct size tip for the amperage being used.for example a tip with a 3/64"
orifice is good for 0-40 amps whereas a 1/16" orifice is better for 40-80 amps. The
low-amp tip has a smaller orifice which maintains a narrow plasma stream
at lower settings for use on thin-gauge material. Using a 25 amp tip at an 60 amp
setting will blow out and distort the tip orifice and require replacement.
Conversely. using an 80-amp tip on the lower settings will not allow you to focus
the plasma stream as well and creates a wide kerf.The condi Lion of the tip orifice
is critical to the quality of the cut result. a worn or damaged tip orifice will
produce a distorted plasma stream resulting in a poor cut quality.
Electrode condition
A fixed gap is established between the electrode and the inside of the cutting tip.
Electrons arc across the gap, ionizing and super heating the air creating the
plasma stream. The electrode contains an insert in the end made of a highly
conductive material called hafnium. This insert erodes with use and develops a
pit in the end of the electrode, when the pit becomes too much poor quality cuts
will result and necessitate replacement of the electrode.
Air pressure and volume
Air pressure, flow rate and air quality are critical to quality plasma cutting and
consumable life span.The required air pressure and volume can vary from model
to model and the manufacturer will provide the specs.The primeweld cut50 air
pressure is pre-set at 4.5 psi and requires a flow rate of 6.0 CF/M. The volume
capacity of your compressor is important. if you have a small compressor with
exactly the same l/min rating as the plasma, then the compressor will run
continuously when you are plasma cutting. a compressor with a l/min rating
slightly higher than the plasma would be more adequate. If you are doing a lot of
cutting, cutting thick plate (same air consumption but slower cut speeds = longer
cut time) then choose a compressor at 1.5 to 2 times the plasma system
requirement.
PLASMA CUTTER
Torch height too low Reverse
bevel. Tip may contact the work
piece and short out or damage
the tip.
OPERATION MANUAL
15
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