
4.DESCRIPTION OF PARAMETERS B-64120EN/01
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This parameter sets the upper limit of the cutting feedrate that is
effective during polar coordinate interpolation. If a feedrate greater
than the maximum feedrate is specified during polar coordinate
interpolation, it is clamped to the feedrate specified by the parameter.
When the setting is 0, the feedrate during polar coordinate
interpolation is clamped to the maximum cutting feedrate usually
specified with parameter 1422.
Allowable automatic override percentage in polar coordinate interpolation
5463
[Data type] Byte
[Unit of data] %
[Valid data range] 0 to 100
This parameter sets an allowable percentage to find an allowable
feedrate on a rotation axis in polar coordinate interpolation mode. A
maximum cutting feedrate (parameter No.5462), multiplied by the
allowable percentage set with this parameter represents an allowable
feedrate.
Allowable feedrate
on rotation axis
=
maximum cutting
feedrate
× allowable percentage
In polar coordinate interpolation mode, the feedrate component on a
rotation axis increases as the tool moves closer to the center of a
workpiece. Near the center of a workpiece, the maximum allowable
feedrate (parameter No.5462) may be exceeded. To prevent the
feedrate component on a rotation axis from exceeding the maximum
allowable feedrate in polar coordinate interpolation mode, the
following override is automatically applied to the feedrate (automatic
override):
Allowable feedrate on rotation axis
Override =
Feedrate component on rotation axis
× 100 (%)
If the overridden feedrate component for a rotation axis still exceeds
the allowable feedrate, the feedrate is clamped to prevent the feedrate
component on a rotation axis from exceeding a maximum cutting
feedrate (automatic feedrate clamp).
NOTE
When 0 is set in this parameter, a specification of
90% is assumed. When a value of 100 or greater is
set with this parameter, a specification of 100% is
assumed. Before the automatic override function
and automatic feedrate clamp function can be
used, bit 1 (AFC) of parameter No.5450 must be
set to