Table 28 - Process options and possible results for mild steel
Process cate-
gory number
Process cate-
gory condition
Category description Quality Speed
Category 1 PCT • The process best balances cut speed
and cut quality.
• The process is optimal for this
thickness.
• The cuts frequently have no dross.
Very good Very good
Category 2 Thicker than PCT • The process is a good selection when
edge quality is more important than
speed.
• Some low-speed dross is possible.
Very good
to excellent
Lower
Category 3 Thinner than PCT • The process is a good selection when
speed is more important than edge
quality.
• The cuts frequently have no dross.
Lower Higher
Category 4 Edge start for
most processes
• An edge start is necessary, but not for
argon-assist processes.
• Thick, low-speed dross is possible.
Good Low
Category 5 Severance • This is the maximum thickness for
these processes.
• An edge start is necessary.
• Cut speeds can be very slow.
• Cut-edge quality can be rough.
• It is possible to get a lot of dross.
• Thick-metal cutting techniques can be
necessary.
• There is a risk that the voltages that
are necessary for severance cutting
can prevent the system from operating
at 100% duty cycle with extended
cutting intervals.
Very low Very low
In general, Hypertherm recommends lower amperage processes for the
best cut-edge quality and higher amperage processes for the best dross-
free cutting. When speed is more important than quality, use a higher
amperage process. For information about process selection, refer to the
XPR Cut Charts Instruction Manual (809830).
Operation
6
234
811530 Instruction Manual XPR460
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