
B-63783EN-1/01 6.INTERPOLATION FUNCTION
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1491 Lower feedrate limit for the deceleration function based on the acceleration
during circular interpolation (for normal mode)
[Input type] Parameter input
[Data type] Real
[Unit of data] mm/min, inch/min, degree/min (machine unit)
[Minimum unit of data] Depend on the increment system of the reference axis
[Valid data range] Refer to the standard parameter setting table (C)
(When the increment system is IS-B, 0.0 - +240000.0)
The deceleration function based on the acceleration during circular
interpolation automatically calculates the optimum feedrate so that the
acceleration resulting from changes in the travel direction during
circular interpolation does not exceed the allowable acceleration
specified for parameter No. 1665.
If the arc radius is very small, the calculated feedrate may become very
low.
If this occurs, to prevent the feedrate from becoming too low,
deceleration to a feedrate lower than that specified for this parameter
can be suppressed.
The lower feedrate limit for the deceleration function based on the
acceleration in fine HPCC mode can be specified for parameter No. 1483.
NOTE
During involute interpolation, this parameter is applied to the
lower feedrate limit for the "acceleration clamp in the vicinity of
the basic circle" of involute interpolation automatic feedrate
control.