
B-63323EN-1/03 6.NTERPOLATION FUNCTION
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Fig. 6.18.1(a)
- Supporting roll-over
If a control point command is issued to a rotation axis to be subjected to
roll-over in absolute (G90) mode, a change made due to short-cutting to
the relative position of the control point is calculated after roll-over is
performed on the control point.
- Supporting inverse-time feed
Issuing G93 during NURBS interpolation puts the machine in inverse-
time (G93) mode. The inverse time (FRN) is specified using an F code.
The inverse time (FRN) for NURBS interpolation is represented using
the following expression:
FRN = Speed/Distance
Speed: mm/min (metric input) or inch/min (inch input)
Distance: mm (metric input) or inch (inch input)
(Distance of movement along the NURBS curve. It is not
necessarily the distance moved if a rotation axis is involved.)