5
04.00 Special Motion Commands
5.2 S
line inter
olation
5
840D
NCU 571
840D
NCU 572
NCU 573
FM-NC
810D
840Di
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Siemens AG 2000. All rights reserved
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA)
−
04.00 Edition
5-157
What does which spline do?
Comparison of three spline types with identical
interpolation points:
A spline (akima spline)
B spline (Bezier spline)
C spline (cubic spline)
P2
P3
P4
P6
P7
P5
P1
A spline
B spline
C spline
Spline grouping
Up to eight path axes can be involved in a spline
interpolation grouping. The SPLINEPATH instruction
defines which axes are to be involved in the spline.
The instruction is programmed in a separate block. If
SPLINEPATH is not explicitly programmed, then the
first three axes in the channel are traversed as the
spline grouping.
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