4. DESCRIPTION OF PARAMETERS
B–63010EN/02
296
5463 Allowable automatic override percentage in polar coordinate interpolation
[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):
(Override) =
(Allowable feedrate on rotation axis)
(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 1.