
6. INTERPOLATION FUNCTION
B–63523EN–1/03
752
NURBS interpolation must be specified in high–precision contour
control mode (between G05 P10000 and G05 P0). The CNC executes
NURBS interpolation while smoothly accelerating or decelerating the
movement so that the acceleration on each axis will not exceed the
allowable maximum acceleration of the machine. In this way, the CNC
automatically controls the speed in order to prevent excessive strain
imposed on the machine.
For parameter information, see Subsection 7.1.14, ”High–precision
Contour Control by RISC (M series)”.
Number Message Description
An illegal rank is specified.
No knot is specified.
An illegal knot is specified.
Too many axes are specified.
Other program error
A look–ahead block contains a pro-
gram error.
The knot does not increase at a
constant rate.
An inhibited mode is specified in
NURBS interpolation mode.
5117 SPL: ERROR The first NURBS control point is illegal.
5188 SPL: ERROR An attempt was made to resume
NURBS interpolation after manual in-
tervention in manual absolute mode.
Series
16i/18i/160i/180i/
160is/180is
OPERATOR’S MANUAL
(For Machining Center)
(B–63534EN)
II.4.13 NURBS interpolation
Parameter
Alarm and message
Reference item